data_2KEK
# 
_entry.id   2KEK 
# 
_audit_conform.dict_name       mmcif_pdbx.dic 
_audit_conform.dict_version    5.350 
_audit_conform.dict_location   http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 
# 
loop_
_database_2.database_id 
_database_2.database_code 
_database_2.pdbx_database_accession 
_database_2.pdbx_DOI 
PDB   2KEK         pdb_00002kek 10.2210/pdb2kek/pdb 
RCSB  RCSB101023   ?            ?                   
WWPDB D_1000101023 ?            ?                   
# 
loop_
_pdbx_database_related.content_type 
_pdbx_database_related.db_id 
_pdbx_database_related.db_name 
_pdbx_database_related.details 
unspecified 1L1M PDB .                                               
unspecified 2KEI PDB 'Same protein bound to its natural operator O1' 
unspecified 2KEJ PDB 'Same protein bound to its natural operator O2' 
# 
_pdbx_database_status.deposit_site                    BMRB 
_pdbx_database_status.entry_id                        2KEK 
_pdbx_database_status.process_site                    RCSB 
_pdbx_database_status.recvd_initial_deposition_date   2009-01-30 
_pdbx_database_status.SG_entry                        ? 
_pdbx_database_status.status_code                     REL 
_pdbx_database_status.status_code_mr                  REL 
_pdbx_database_status.status_code_sf                  ? 
_pdbx_database_status.pdb_format_compatible           Y 
_pdbx_database_status.status_code_cs                  ? 
_pdbx_database_status.status_code_nmr_data            ? 
_pdbx_database_status.methods_development_category    ? 
# 
loop_
_audit_author.name 
_audit_author.pdbx_ordinal 
'Romanuka, J.'   1 
'Folkers, G.'    2 
'Biris, N.'      3 
'Tishchenko, E.' 4 
'Wienk, H.'      5 
'Kaptein, R.'    6 
'Boelens, R.'    7 
# 
_citation.id                        primary 
_citation.title                     
;Specificity and affinity of Lac repressor for the auxiliary operators O2 and O3 are explained by the structures of their protein-DNA complexes.
;
_citation.journal_abbrev            J.Mol.Biol. 
_citation.journal_volume            390 
_citation.page_first                478 
_citation.page_last                 489 
_citation.year                      2009 
_citation.journal_id_ASTM           JMOBAK 
_citation.country                   UK 
_citation.journal_id_ISSN           0022-2836 
_citation.journal_id_CSD            0070 
_citation.book_publisher            ? 
_citation.pdbx_database_id_PubMed   19450607 
_citation.pdbx_database_id_DOI      10.1016/j.jmb.2009.05.022 
# 
loop_
_citation_author.citation_id 
_citation_author.name 
_citation_author.ordinal 
_citation_author.identifier_ORCID 
primary 'Romanuka, J.'   1 ? 
primary 'Folkers, G.E.'  2 ? 
primary 'Biris, N.'      3 ? 
primary 'Tishchenko, E.' 4 ? 
primary 'Wienk, H.'      5 ? 
primary 'Bonvin, A.M.'   6 ? 
primary 'Kaptein, R.'    7 ? 
primary 'Boelens, R.'    8 ? 
# 
_cell.entry_id           2KEK 
_cell.length_a           1.000 
_cell.length_b           1.000 
_cell.length_c           1.000 
_cell.angle_alpha        90.00 
_cell.angle_beta         90.00 
_cell.angle_gamma        90.00 
_cell.Z_PDB              1 
_cell.pdbx_unique_axis   ? 
# 
_symmetry.entry_id                         2KEK 
_symmetry.space_group_name_H-M             'P 1' 
_symmetry.pdbx_full_space_group_name_H-M   ? 
_symmetry.cell_setting                     ? 
_symmetry.Int_Tables_number                1 
# 
loop_
_entity.id 
_entity.type 
_entity.src_method 
_entity.pdbx_description 
_entity.formula_weight 
_entity.pdbx_number_of_molecules 
_entity.pdbx_ec 
_entity.pdbx_mutation 
_entity.pdbx_fragment 
_entity.details 
1 polymer man 'Lactose operon repressor'                                                             6822.755 2 ? V52C 
'UNP residues 1-62' ? 
2 polymer syn 
;DNA (5'-D(*CP*GP*GP*CP*AP*GP*TP*GP*AP*GP*CP*GP*CP*AP*AP*CP*GP*CP*AP*AP*TP*TP*C)-3')
;
7075.575 1 ? ?    ?                   ? 
3 polymer syn 
;DNA (5'-D(P*GP*AP*AP*TP*TP*GP*CP*GP*TP*TP*GP*CP*GP*CP*TP*CP*AP*CP*TP*GP*CP*CP*G)-3')
;
7048.532 1 ? ?    ?                   ? 
# 
loop_
_entity_poly.entity_id 
_entity_poly.type 
_entity_poly.nstd_linkage 
_entity_poly.nstd_monomer 
_entity_poly.pdbx_seq_one_letter_code 
_entity_poly.pdbx_seq_one_letter_code_can 
_entity_poly.pdbx_strand_id 
_entity_poly.pdbx_target_identifier 
1 'polypeptide(L)'        no no MKPVTLYDVAEYAGVSYQTVSRVVNQASHVSAKTREKVEAAMAELNYIPNRCAQQLAGKQSL                                  
MKPVTLYDVAEYAGVSYQTVSRVVNQASHVSAKTREKVEAAMAELNYIPNRCAQQLAGKQSL A,B ? 
2 polydeoxyribonucleotide no no 
;(DC)(DG)(DG)(DC)(DA)(DG)(DT)(DG)(DA)(DG)(DC)(DG)(DC)(DA)(DA)(DC)(DG)(DC)(DA)(DA)
(DT)(DT)(DC)
;
CGGCAGTGAGCGCAACGCAATTC                                        C   ? 
3 polydeoxyribonucleotide no no 
;(DG)(DA)(DA)(DT)(DT)(DG)(DC)(DG)(DT)(DT)(DG)(DC)(DG)(DC)(DT)(DC)(DA)(DC)(DT)(DG)
(DC)(DC)(DG)
;
GAATTGCGTTGCGCTCACTGCCG                                        D   ? 
# 
loop_
_entity_poly_seq.entity_id 
_entity_poly_seq.num 
_entity_poly_seq.mon_id 
_entity_poly_seq.hetero 
1 1  MET n 
1 2  LYS n 
1 3  PRO n 
1 4  VAL n 
1 5  THR n 
1 6  LEU n 
1 7  TYR n 
1 8  ASP n 
1 9  VAL n 
1 10 ALA n 
1 11 GLU n 
1 12 TYR n 
1 13 ALA n 
1 14 GLY n 
1 15 VAL n 
1 16 SER n 
1 17 TYR n 
1 18 GLN n 
1 19 THR n 
1 20 VAL n 
1 21 SER n 
1 22 ARG n 
1 23 VAL n 
1 24 VAL n 
1 25 ASN n 
1 26 GLN n 
1 27 ALA n 
1 28 SER n 
1 29 HIS n 
1 30 VAL n 
1 31 SER n 
1 32 ALA n 
1 33 LYS n 
1 34 THR n 
1 35 ARG n 
1 36 GLU n 
1 37 LYS n 
1 38 VAL n 
1 39 GLU n 
1 40 ALA n 
1 41 ALA n 
1 42 MET n 
1 43 ALA n 
1 44 GLU n 
1 45 LEU n 
1 46 ASN n 
1 47 TYR n 
1 48 ILE n 
1 49 PRO n 
1 50 ASN n 
1 51 ARG n 
1 52 CYS n 
1 53 ALA n 
1 54 GLN n 
1 55 GLN n 
1 56 LEU n 
1 57 ALA n 
1 58 GLY n 
1 59 LYS n 
1 60 GLN n 
1 61 SER n 
1 62 LEU n 
2 1  DC  n 
2 2  DG  n 
2 3  DG  n 
2 4  DC  n 
2 5  DA  n 
2 6  DG  n 
2 7  DT  n 
2 8  DG  n 
2 9  DA  n 
2 10 DG  n 
2 11 DC  n 
2 12 DG  n 
2 13 DC  n 
2 14 DA  n 
2 15 DA  n 
2 16 DC  n 
2 17 DG  n 
2 18 DC  n 
2 19 DA  n 
2 20 DA  n 
2 21 DT  n 
2 22 DT  n 
2 23 DC  n 
3 1  DG  n 
3 2  DA  n 
3 3  DA  n 
3 4  DT  n 
3 5  DT  n 
3 6  DG  n 
3 7  DC  n 
3 8  DG  n 
3 9  DT  n 
3 10 DT  n 
3 11 DG  n 
3 12 DC  n 
3 13 DG  n 
3 14 DC  n 
3 15 DT  n 
3 16 DC  n 
3 17 DA  n 
3 18 DC  n 
3 19 DT  n 
3 20 DG  n 
3 21 DC  n 
3 22 DC  n 
3 23 DG  n 
# 
_entity_src_gen.entity_id                          1 
_entity_src_gen.pdbx_src_id                        1 
_entity_src_gen.pdbx_alt_source_flag               sample 
_entity_src_gen.pdbx_seq_type                      ? 
_entity_src_gen.pdbx_beg_seq_num                   ? 
_entity_src_gen.pdbx_end_seq_num                   ? 
_entity_src_gen.gene_src_common_name               ? 
_entity_src_gen.gene_src_genus                     ? 
_entity_src_gen.pdbx_gene_src_gene                 'lacI, b0345, JW0336' 
_entity_src_gen.gene_src_species                   ? 
_entity_src_gen.gene_src_strain                    K-12 
_entity_src_gen.gene_src_tissue                    ? 
_entity_src_gen.gene_src_tissue_fraction           ? 
_entity_src_gen.gene_src_details                   ? 
_entity_src_gen.pdbx_gene_src_fragment             ? 
_entity_src_gen.pdbx_gene_src_scientific_name      'Escherichia coli' 
_entity_src_gen.pdbx_gene_src_ncbi_taxonomy_id     83333 
_entity_src_gen.pdbx_gene_src_variant              ? 
_entity_src_gen.pdbx_gene_src_cell_line            ? 
_entity_src_gen.pdbx_gene_src_atcc                 ? 
_entity_src_gen.pdbx_gene_src_organ                ? 
_entity_src_gen.pdbx_gene_src_organelle            ? 
_entity_src_gen.pdbx_gene_src_cell                 ? 
_entity_src_gen.pdbx_gene_src_cellular_location    ? 
_entity_src_gen.host_org_common_name               ? 
_entity_src_gen.pdbx_host_org_scientific_name      'Escherichia coli' 
_entity_src_gen.pdbx_host_org_ncbi_taxonomy_id     562 
_entity_src_gen.host_org_genus                     ? 
_entity_src_gen.pdbx_host_org_gene                 ? 
_entity_src_gen.pdbx_host_org_organ                ? 
_entity_src_gen.host_org_species                   ? 
_entity_src_gen.pdbx_host_org_tissue               ? 
_entity_src_gen.pdbx_host_org_tissue_fraction      ? 
_entity_src_gen.pdbx_host_org_strain               DH9 
_entity_src_gen.pdbx_host_org_variant              ? 
_entity_src_gen.pdbx_host_org_cell_line            ? 
_entity_src_gen.pdbx_host_org_atcc                 ? 
_entity_src_gen.pdbx_host_org_culture_collection   ? 
_entity_src_gen.pdbx_host_org_cell                 ? 
_entity_src_gen.pdbx_host_org_organelle            ? 
_entity_src_gen.pdbx_host_org_cellular_location    ? 
_entity_src_gen.pdbx_host_org_vector_type          ? 
_entity_src_gen.pdbx_host_org_vector               ? 
_entity_src_gen.host_org_details                   ? 
_entity_src_gen.expression_system_id               ? 
_entity_src_gen.plasmid_name                       ? 
_entity_src_gen.plasmid_details                    ? 
_entity_src_gen.pdbx_description                   ? 
# 
loop_
_struct_ref.id 
_struct_ref.db_name 
_struct_ref.db_code 
_struct_ref.pdbx_db_accession 
_struct_ref.entity_id 
_struct_ref.pdbx_seq_one_letter_code 
_struct_ref.pdbx_align_begin 
_struct_ref.pdbx_db_isoform 
1 UNP LACI_ECOLI P03023 1 MKPVTLYDVAEYAGVSYQTVSRVVNQASHVSAKTREKVEAAMAELNYIPNRVAQQLAGKQSL 1 ? 
2 PDB 2KEK       2KEK   2 CGGCAGTGAGCGCAACGCAATTC                                        1 ? 
3 PDB 2KEK       2KEK   3 GAATTGCGTTGCGCTCACTGCCG                                        1 ? 
# 
loop_
_struct_ref_seq.align_id 
_struct_ref_seq.ref_id 
_struct_ref_seq.pdbx_PDB_id_code 
_struct_ref_seq.pdbx_strand_id 
_struct_ref_seq.seq_align_beg 
_struct_ref_seq.pdbx_seq_align_beg_ins_code 
_struct_ref_seq.seq_align_end 
_struct_ref_seq.pdbx_seq_align_end_ins_code 
_struct_ref_seq.pdbx_db_accession 
_struct_ref_seq.db_align_beg 
_struct_ref_seq.pdbx_db_align_beg_ins_code 
_struct_ref_seq.db_align_end 
_struct_ref_seq.pdbx_db_align_end_ins_code 
_struct_ref_seq.pdbx_auth_seq_align_beg 
_struct_ref_seq.pdbx_auth_seq_align_end 
1 1 2KEK A 1 ? 62 ? P03023 1  ? 62 ? 1  62 
2 1 2KEK B 1 ? 62 ? P03023 1  ? 62 ? 1  62 
3 2 2KEK C 1 ? 23 ? 2KEK   -1 ? 22 ? -1 22 
4 3 2KEK D 1 ? 23 ? 2KEK   -1 ? 22 ? -1 22 
# 
loop_
_struct_ref_seq_dif.align_id 
_struct_ref_seq_dif.pdbx_pdb_id_code 
_struct_ref_seq_dif.mon_id 
_struct_ref_seq_dif.pdbx_pdb_strand_id 
_struct_ref_seq_dif.seq_num 
_struct_ref_seq_dif.pdbx_pdb_ins_code 
_struct_ref_seq_dif.pdbx_seq_db_name 
_struct_ref_seq_dif.pdbx_seq_db_accession_code 
_struct_ref_seq_dif.db_mon_id 
_struct_ref_seq_dif.pdbx_seq_db_seq_num 
_struct_ref_seq_dif.details 
_struct_ref_seq_dif.pdbx_auth_seq_num 
_struct_ref_seq_dif.pdbx_ordinal 
1 2KEK CYS A 52 ? UNP P03023 VAL 52 'engineered mutation' 52 1 
2 2KEK CYS B 52 ? UNP P03023 VAL 52 'engineered mutation' 52 2 
# 
loop_
_chem_comp.id 
_chem_comp.type 
_chem_comp.mon_nstd_flag 
_chem_comp.name 
_chem_comp.pdbx_synonyms 
_chem_comp.formula 
_chem_comp.formula_weight 
ALA 'L-peptide linking' y ALANINE                              ? 'C3 H7 N O2'      89.093  
ARG 'L-peptide linking' y ARGININE                             ? 'C6 H15 N4 O2 1'  175.209 
ASN 'L-peptide linking' y ASPARAGINE                           ? 'C4 H8 N2 O3'     132.118 
ASP 'L-peptide linking' y 'ASPARTIC ACID'                      ? 'C4 H7 N O4'      133.103 
CYS 'L-peptide linking' y CYSTEINE                             ? 'C3 H7 N O2 S'    121.158 
DA  'DNA linking'       y "2'-DEOXYADENOSINE-5'-MONOPHOSPHATE" ? 'C10 H14 N5 O6 P' 331.222 
DC  'DNA linking'       y "2'-DEOXYCYTIDINE-5'-MONOPHOSPHATE"  ? 'C9 H14 N3 O7 P'  307.197 
DG  'DNA linking'       y "2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE" ? 'C10 H14 N5 O7 P' 347.221 
DT  'DNA linking'       y "THYMIDINE-5'-MONOPHOSPHATE"         ? 'C10 H15 N2 O8 P' 322.208 
GLN 'L-peptide linking' y GLUTAMINE                            ? 'C5 H10 N2 O3'    146.144 
GLU 'L-peptide linking' y 'GLUTAMIC ACID'                      ? 'C5 H9 N O4'      147.129 
GLY 'peptide linking'   y GLYCINE                              ? 'C2 H5 N O2'      75.067  
HIS 'L-peptide linking' y HISTIDINE                            ? 'C6 H10 N3 O2 1'  156.162 
ILE 'L-peptide linking' y ISOLEUCINE                           ? 'C6 H13 N O2'     131.173 
LEU 'L-peptide linking' y LEUCINE                              ? 'C6 H13 N O2'     131.173 
LYS 'L-peptide linking' y LYSINE                               ? 'C6 H15 N2 O2 1'  147.195 
MET 'L-peptide linking' y METHIONINE                           ? 'C5 H11 N O2 S'   149.211 
PRO 'L-peptide linking' y PROLINE                              ? 'C5 H9 N O2'      115.130 
SER 'L-peptide linking' y SERINE                               ? 'C3 H7 N O3'      105.093 
THR 'L-peptide linking' y THREONINE                            ? 'C4 H9 N O3'      119.119 
TYR 'L-peptide linking' y TYROSINE                             ? 'C9 H11 N O3'     181.189 
VAL 'L-peptide linking' y VALINE                               ? 'C5 H11 N O2'     117.146 
# 
loop_
_pdbx_nmr_exptl.conditions_id 
_pdbx_nmr_exptl.experiment_id 
_pdbx_nmr_exptl.solution_id 
_pdbx_nmr_exptl.type 
1 1 1 '3D 1H-13C NOESY' 
1 2 1 '3D 1H-15N NOESY' 
1 3 1 '2D 1H-1H NOESY'  
# 
_pdbx_nmr_exptl_sample_conditions.conditions_id       1 
_pdbx_nmr_exptl_sample_conditions.ionic_strength      0.03 
_pdbx_nmr_exptl_sample_conditions.pH                  6 
_pdbx_nmr_exptl_sample_conditions.pressure            ambient 
_pdbx_nmr_exptl_sample_conditions.pressure_units      ? 
_pdbx_nmr_exptl_sample_conditions.temperature         315 
_pdbx_nmr_exptl_sample_conditions.temperature_units   K 
# 
_pdbx_nmr_sample_details.contents         
;0.7 mM DNA (5'-strand1-3'), 0.7 mM DNA (5'-strand2-3'), 
0.7 mM Lac headpiece dimer, 5% D2O, 10 mM potassium phosphate, 
20 mM potassium chloride, 5% U-100% 2H d8-glycerol, 
0.01% sodium azide, 95% H2O/5% D2O
;
_pdbx_nmr_sample_details.solution_id      1 
_pdbx_nmr_sample_details.solvent_system   '95% H2O/5% D2O' 
# 
loop_
_pdbx_nmr_spectrometer.field_strength 
_pdbx_nmr_spectrometer.manufacturer 
_pdbx_nmr_spectrometer.model 
_pdbx_nmr_spectrometer.spectrometer_id 
_pdbx_nmr_spectrometer.type 
750 Bruker AVANCE 1 'Bruker Avance' 
600 Bruker AVANCE 2 'Bruker Avance' 
900 Bruker AVANCE 3 'Bruker Avance' 
500 Bruker AVANCE 4 'Bruker Avance' 
# 
_pdbx_nmr_refine.entry_id           2KEK 
_pdbx_nmr_refine.method             'simulated annealing' 
_pdbx_nmr_refine.details            ? 
_pdbx_nmr_refine.software_ordinal   1 
# 
_pdbx_nmr_ensemble.average_constraint_violations_per_residue     ? 
_pdbx_nmr_ensemble.average_constraints_per_residue               ? 
_pdbx_nmr_ensemble.average_distance_constraint_violation         ? 
_pdbx_nmr_ensemble.average_torsion_angle_constraint_violation    ? 
_pdbx_nmr_ensemble.conformer_selection_criteria                  'structures with the lowest energy' 
_pdbx_nmr_ensemble.conformers_calculated_total_number            200 
_pdbx_nmr_ensemble.conformers_submitted_total_number             10 
_pdbx_nmr_ensemble.distance_constraint_violation_method          ? 
_pdbx_nmr_ensemble.entry_id                                      2KEK 
_pdbx_nmr_ensemble.maximum_distance_constraint_violation         ? 
_pdbx_nmr_ensemble.maximum_lower_distance_constraint_violation   ? 
_pdbx_nmr_ensemble.maximum_torsion_angle_constraint_violation    ? 
_pdbx_nmr_ensemble.maximum_upper_distance_constraint_violation   ? 
_pdbx_nmr_ensemble.torsion_angle_constraint_violation_method     ? 
# 
_pdbx_nmr_representative.conformer_id         1 
_pdbx_nmr_representative.entry_id             2KEK 
_pdbx_nmr_representative.selection_criteria   'lowest energy' 
# 
loop_
_pdbx_nmr_software.authors 
_pdbx_nmr_software.classification 
_pdbx_nmr_software.name 
_pdbx_nmr_software.version 
_pdbx_nmr_software.ordinal 
'Brunger, Adams, Clore, Gros, Nilges and Read'      refinement                  CNS     1.2 1 
'Bruker Biospin'                                    'chemical shift assignment' XwinNMR ?   2 
'Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax' processing                  NMRPipe ?   3 
'Dominguez, Boelens, Bonvin'                        refinement                  HADDOCK 2.1 4 
# 
_exptl.absorpt_coefficient_mu     ? 
_exptl.absorpt_correction_T_max   ? 
_exptl.absorpt_correction_T_min   ? 
_exptl.absorpt_correction_type    ? 
_exptl.absorpt_process_details    ? 
_exptl.crystals_number            ? 
_exptl.details                    ? 
_exptl.entry_id                   2KEK 
_exptl.method                     'SOLUTION NMR' 
_exptl.method_details             ? 
# 
_struct.entry_id                  2KEK 
_struct.title                     
'Solution structure of a dimer of LAC repressor DNA-binding domain complexed to its natural operator O3' 
_struct.pdbx_model_details        ? 
_struct.pdbx_CASP_flag            ? 
_struct.pdbx_model_type_details   ? 
# 
_struct_keywords.entry_id        2KEK 
_struct_keywords.pdbx_keywords   Transcription/DNA 
_struct_keywords.text            
;Lac repressor, lac operators, protein-DNA complex, DNA-binding, Repressor, Transcription, Transcription regulation, Transcription-DNA COMPLEX
;
# 
loop_
_struct_asym.id 
_struct_asym.pdbx_blank_PDB_chainid_flag 
_struct_asym.pdbx_modified 
_struct_asym.entity_id 
_struct_asym.details 
A N N 1 ? 
B N N 1 ? 
C N N 2 ? 
D N N 3 ? 
# 
_struct_biol.id        1 
_struct_biol.details   ? 
# 
loop_
_struct_conf.conf_type_id 
_struct_conf.id 
_struct_conf.pdbx_PDB_helix_id 
_struct_conf.beg_label_comp_id 
_struct_conf.beg_label_asym_id 
_struct_conf.beg_label_seq_id 
_struct_conf.pdbx_beg_PDB_ins_code 
_struct_conf.end_label_comp_id 
_struct_conf.end_label_asym_id 
_struct_conf.end_label_seq_id 
_struct_conf.pdbx_end_PDB_ins_code 
_struct_conf.beg_auth_comp_id 
_struct_conf.beg_auth_asym_id 
_struct_conf.beg_auth_seq_id 
_struct_conf.end_auth_comp_id 
_struct_conf.end_auth_asym_id 
_struct_conf.end_auth_seq_id 
_struct_conf.pdbx_PDB_helix_class 
_struct_conf.details 
_struct_conf.pdbx_PDB_helix_length 
HELX_P HELX_P1 1 THR A 5  ? GLY A 14 ? THR A 5  GLY A 14 1 ? 10 
HELX_P HELX_P2 2 SER A 16 ? GLN A 26 ? SER A 16 GLN A 26 1 ? 11 
HELX_P HELX_P3 3 THR A 34 ? LEU A 45 ? THR A 34 LEU A 45 1 ? 12 
HELX_P HELX_P4 4 CYS A 52 ? ALA A 57 ? CYS A 52 ALA A 57 1 ? 6  
HELX_P HELX_P5 5 THR B 5  ? GLY B 14 ? THR B 5  GLY B 14 1 ? 10 
HELX_P HELX_P6 6 TYR B 17 ? GLN B 26 ? TYR B 17 GLN B 26 1 ? 10 
HELX_P HELX_P7 7 SER B 31 ? ASN B 46 ? SER B 31 ASN B 46 1 ? 16 
HELX_P HELX_P8 8 CYS B 52 ? LYS B 59 ? CYS B 52 LYS B 59 1 ? 8  
# 
_struct_conf_type.id          HELX_P 
_struct_conf_type.criteria    ? 
_struct_conf_type.reference   ? 
# 
loop_
_struct_conn.id 
_struct_conn.conn_type_id 
_struct_conn.pdbx_leaving_atom_flag 
_struct_conn.pdbx_PDB_id 
_struct_conn.ptnr1_label_asym_id 
_struct_conn.ptnr1_label_comp_id 
_struct_conn.ptnr1_label_seq_id 
_struct_conn.ptnr1_label_atom_id 
_struct_conn.pdbx_ptnr1_label_alt_id 
_struct_conn.pdbx_ptnr1_PDB_ins_code 
_struct_conn.pdbx_ptnr1_standard_comp_id 
_struct_conn.ptnr1_symmetry 
_struct_conn.ptnr2_label_asym_id 
_struct_conn.ptnr2_label_comp_id 
_struct_conn.ptnr2_label_seq_id 
_struct_conn.ptnr2_label_atom_id 
_struct_conn.pdbx_ptnr2_label_alt_id 
_struct_conn.pdbx_ptnr2_PDB_ins_code 
_struct_conn.ptnr1_auth_asym_id 
_struct_conn.ptnr1_auth_comp_id 
_struct_conn.ptnr1_auth_seq_id 
_struct_conn.ptnr2_auth_asym_id 
_struct_conn.ptnr2_auth_comp_id 
_struct_conn.ptnr2_auth_seq_id 
_struct_conn.ptnr2_symmetry 
_struct_conn.pdbx_ptnr3_label_atom_id 
_struct_conn.pdbx_ptnr3_label_seq_id 
_struct_conn.pdbx_ptnr3_label_comp_id 
_struct_conn.pdbx_ptnr3_label_asym_id 
_struct_conn.pdbx_ptnr3_label_alt_id 
_struct_conn.pdbx_ptnr3_PDB_ins_code 
_struct_conn.details 
_struct_conn.pdbx_dist_value 
_struct_conn.pdbx_value_order 
_struct_conn.pdbx_role 
disulf1  disulf ? ? A CYS 52 SG ? ? ? 1_555 B CYS 52 SG ? ? A CYS 52 B CYS 52 1_555 ? ? ? ? ? ? ?                       2.028 ? ? 
hydrog1  hydrog ? ? C DC  1  N3 ? ? ? 1_555 D DG  23 N2 ? ? C DC  -1 D DG  22 1_555 ? ? ? ? ? ? 'REVERSED WATSON-CRICK' ?     ? ? 
hydrog2  hydrog ? ? C DC  1  O2 ? ? ? 1_555 D DG  23 N1 ? ? C DC  -1 D DG  22 1_555 ? ? ? ? ? ? 'REVERSED WATSON-CRICK' ?     ? ? 
hydrog3  hydrog ? ? C DG  2  N1 ? ? ? 1_555 D DC  22 N3 ? ? C DG  1  D DC  21 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog4  hydrog ? ? C DG  2  N2 ? ? ? 1_555 D DC  22 O2 ? ? C DG  1  D DC  21 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog5  hydrog ? ? C DG  2  O6 ? ? ? 1_555 D DC  22 N4 ? ? C DG  1  D DC  21 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog6  hydrog ? ? C DG  3  N1 ? ? ? 1_555 D DC  21 N3 ? ? C DG  2  D DC  20 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog7  hydrog ? ? C DG  3  N2 ? ? ? 1_555 D DC  21 O2 ? ? C DG  2  D DC  20 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog8  hydrog ? ? C DG  3  O6 ? ? ? 1_555 D DC  21 N4 ? ? C DG  2  D DC  20 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog9  hydrog ? ? C DC  4  N3 ? ? ? 1_555 D DG  20 N1 ? ? C DC  3  D DG  19 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog10 hydrog ? ? C DC  4  N4 ? ? ? 1_555 D DG  20 O6 ? ? C DC  3  D DG  19 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog11 hydrog ? ? C DC  4  O2 ? ? ? 1_555 D DG  20 N2 ? ? C DC  3  D DG  19 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog12 hydrog ? ? C DA  5  N1 ? ? ? 1_555 D DT  19 N3 ? ? C DA  4  D DT  18 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog13 hydrog ? ? C DA  5  N6 ? ? ? 1_555 D DT  19 O4 ? ? C DA  4  D DT  18 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog14 hydrog ? ? C DG  6  N1 ? ? ? 1_555 D DC  18 N3 ? ? C DG  5  D DC  17 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog15 hydrog ? ? C DG  6  N2 ? ? ? 1_555 D DC  18 O2 ? ? C DG  5  D DC  17 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog16 hydrog ? ? C DG  6  O6 ? ? ? 1_555 D DC  18 N4 ? ? C DG  5  D DC  17 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog17 hydrog ? ? C DT  7  N3 ? ? ? 1_555 D DA  17 N1 ? ? C DT  6  D DA  16 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog18 hydrog ? ? C DT  7  O4 ? ? ? 1_555 D DA  17 N6 ? ? C DT  6  D DA  16 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog19 hydrog ? ? C DG  8  N1 ? ? ? 1_555 D DC  16 N3 ? ? C DG  7  D DC  15 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog20 hydrog ? ? C DG  8  N2 ? ? ? 1_555 D DC  16 O2 ? ? C DG  7  D DC  15 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog21 hydrog ? ? C DG  8  O6 ? ? ? 1_555 D DC  16 N4 ? ? C DG  7  D DC  15 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog22 hydrog ? ? C DA  9  N1 ? ? ? 1_555 D DT  15 N3 ? ? C DA  8  D DT  14 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog23 hydrog ? ? C DA  9  N6 ? ? ? 1_555 D DT  15 O4 ? ? C DA  8  D DT  14 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog24 hydrog ? ? C DG  10 N1 ? ? ? 1_555 D DC  14 N3 ? ? C DG  9  D DC  13 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog25 hydrog ? ? C DG  10 N2 ? ? ? 1_555 D DC  14 O2 ? ? C DG  9  D DC  13 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog26 hydrog ? ? C DG  10 O6 ? ? ? 1_555 D DC  14 N4 ? ? C DG  9  D DC  13 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog27 hydrog ? ? C DC  11 N3 ? ? ? 1_555 D DG  13 N1 ? ? C DC  10 D DG  12 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog28 hydrog ? ? C DC  11 N4 ? ? ? 1_555 D DG  13 O6 ? ? C DC  10 D DG  12 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog29 hydrog ? ? C DC  11 O2 ? ? ? 1_555 D DG  13 N2 ? ? C DC  10 D DG  12 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog30 hydrog ? ? C DG  12 N1 ? ? ? 1_555 D DC  12 N3 ? ? C DG  11 D DC  11 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog31 hydrog ? ? C DG  12 N2 ? ? ? 1_555 D DC  12 O2 ? ? C DG  11 D DC  11 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog32 hydrog ? ? C DG  12 O6 ? ? ? 1_555 D DC  12 N4 ? ? C DG  11 D DC  11 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog33 hydrog ? ? C DC  13 N3 ? ? ? 1_555 D DG  11 N1 ? ? C DC  12 D DG  10 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog34 hydrog ? ? C DC  13 N4 ? ? ? 1_555 D DG  11 O6 ? ? C DC  12 D DG  10 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog35 hydrog ? ? C DC  13 O2 ? ? ? 1_555 D DG  11 N2 ? ? C DC  12 D DG  10 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog36 hydrog ? ? C DA  14 N1 ? ? ? 1_555 D DT  10 N3 ? ? C DA  13 D DT  9  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog37 hydrog ? ? C DA  14 N6 ? ? ? 1_555 D DT  10 O4 ? ? C DA  13 D DT  9  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog38 hydrog ? ? C DA  15 N1 ? ? ? 1_555 D DT  9  N3 ? ? C DA  14 D DT  8  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog39 hydrog ? ? C DA  15 N6 ? ? ? 1_555 D DT  9  O4 ? ? C DA  14 D DT  8  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog40 hydrog ? ? C DC  16 N3 ? ? ? 1_555 D DG  8  N1 ? ? C DC  15 D DG  7  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog41 hydrog ? ? C DC  16 N4 ? ? ? 1_555 D DG  8  O6 ? ? C DC  15 D DG  7  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog42 hydrog ? ? C DC  16 O2 ? ? ? 1_555 D DG  8  N2 ? ? C DC  15 D DG  7  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog43 hydrog ? ? C DG  17 N1 ? ? ? 1_555 D DC  7  N3 ? ? C DG  16 D DC  6  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog44 hydrog ? ? C DG  17 N2 ? ? ? 1_555 D DC  7  O2 ? ? C DG  16 D DC  6  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog45 hydrog ? ? C DG  17 O6 ? ? ? 1_555 D DC  7  N4 ? ? C DG  16 D DC  6  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog46 hydrog ? ? C DC  18 N3 ? ? ? 1_555 D DG  6  N1 ? ? C DC  17 D DG  5  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog47 hydrog ? ? C DC  18 N4 ? ? ? 1_555 D DG  6  O6 ? ? C DC  17 D DG  5  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog48 hydrog ? ? C DC  18 O2 ? ? ? 1_555 D DG  6  N2 ? ? C DC  17 D DG  5  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog49 hydrog ? ? C DA  19 N1 ? ? ? 1_555 D DT  5  N3 ? ? C DA  18 D DT  4  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog50 hydrog ? ? C DA  19 N6 ? ? ? 1_555 D DT  5  O4 ? ? C DA  18 D DT  4  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog51 hydrog ? ? C DA  20 N1 ? ? ? 1_555 D DT  4  N3 ? ? C DA  19 D DT  3  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog52 hydrog ? ? C DA  20 N6 ? ? ? 1_555 D DT  4  O4 ? ? C DA  19 D DT  3  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog53 hydrog ? ? C DT  21 N3 ? ? ? 1_555 D DA  3  N1 ? ? C DT  20 D DA  2  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog54 hydrog ? ? C DT  21 O4 ? ? ? 1_555 D DA  3  N6 ? ? C DT  20 D DA  2  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog55 hydrog ? ? C DT  22 N3 ? ? ? 1_555 D DA  2  N1 ? ? C DT  21 D DA  1  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog56 hydrog ? ? C DT  22 O4 ? ? ? 1_555 D DA  2  N6 ? ? C DT  21 D DA  1  1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog57 hydrog ? ? C DC  23 N3 ? ? ? 1_555 D DG  1  N1 ? ? C DC  22 D DG  -1 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog58 hydrog ? ? C DC  23 N4 ? ? ? 1_555 D DG  1  O6 ? ? C DC  22 D DG  -1 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
hydrog59 hydrog ? ? C DC  23 O2 ? ? ? 1_555 D DG  1  N2 ? ? C DC  22 D DG  -1 1_555 ? ? ? ? ? ? WATSON-CRICK            ?     ? ? 
# 
loop_
_struct_conn_type.id 
_struct_conn_type.criteria 
_struct_conn_type.reference 
disulf ? ? 
hydrog ? ? 
# 
_atom_sites.entry_id                    2KEK 
_atom_sites.fract_transf_matrix[1][1]   1.000000 
_atom_sites.fract_transf_matrix[1][2]   0.000000 
_atom_sites.fract_transf_matrix[1][3]   0.000000 
_atom_sites.fract_transf_matrix[2][1]   0.000000 
_atom_sites.fract_transf_matrix[2][2]   1.000000 
_atom_sites.fract_transf_matrix[2][3]   0.000000 
_atom_sites.fract_transf_matrix[3][1]   0.000000 
_atom_sites.fract_transf_matrix[3][2]   0.000000 
_atom_sites.fract_transf_matrix[3][3]   1.000000 
_atom_sites.fract_transf_vector[1]      0.00000 
_atom_sites.fract_transf_vector[2]      0.00000 
_atom_sites.fract_transf_vector[3]      0.00000 
# 
loop_
_atom_type.symbol 
C 
H 
N 
O 
P 
S 
# 
loop_
_pdbx_poly_seq_scheme.asym_id 
_pdbx_poly_seq_scheme.entity_id 
_pdbx_poly_seq_scheme.seq_id 
_pdbx_poly_seq_scheme.mon_id 
_pdbx_poly_seq_scheme.ndb_seq_num 
_pdbx_poly_seq_scheme.pdb_seq_num 
_pdbx_poly_seq_scheme.auth_seq_num 
_pdbx_poly_seq_scheme.pdb_mon_id 
_pdbx_poly_seq_scheme.auth_mon_id 
_pdbx_poly_seq_scheme.pdb_strand_id 
_pdbx_poly_seq_scheme.pdb_ins_code 
_pdbx_poly_seq_scheme.hetero 
A 1 1  MET 1  1  1  MET MET A . n 
A 1 2  LYS 2  2  2  LYS LYS A . n 
A 1 3  PRO 3  3  3  PRO PRO A . n 
A 1 4  VAL 4  4  4  VAL VAL A . n 
A 1 5  THR 5  5  5  THR THR A . n 
A 1 6  LEU 6  6  6  LEU LEU A . n 
A 1 7  TYR 7  7  7  TYR TYR A . n 
A 1 8  ASP 8  8  8  ASP ASP A . n 
A 1 9  VAL 9  9  9  VAL VAL A . n 
A 1 10 ALA 10 10 10 ALA ALA A . n 
A 1 11 GLU 11 11 11 GLU GLU A . n 
A 1 12 TYR 12 12 12 TYR TYR A . n 
A 1 13 ALA 13 13 13 ALA ALA A . n 
A 1 14 GLY 14 14 14 GLY GLY A . n 
A 1 15 VAL 15 15 15 VAL VAL A . n 
A 1 16 SER 16 16 16 SER SER A . n 
A 1 17 TYR 17 17 17 TYR TYR A . n 
A 1 18 GLN 18 18 18 GLN GLN A . n 
A 1 19 THR 19 19 19 THR THR A . n 
A 1 20 VAL 20 20 20 VAL VAL A . n 
A 1 21 SER 21 21 21 SER SER A . n 
A 1 22 ARG 22 22 22 ARG ARG A . n 
A 1 23 VAL 23 23 23 VAL VAL A . n 
A 1 24 VAL 24 24 24 VAL VAL A . n 
A 1 25 ASN 25 25 25 ASN ASN A . n 
A 1 26 GLN 26 26 26 GLN GLN A . n 
A 1 27 ALA 27 27 27 ALA ALA A . n 
A 1 28 SER 28 28 28 SER SER A . n 
A 1 29 HIS 29 29 29 HIS HIS A . n 
A 1 30 VAL 30 30 30 VAL VAL A . n 
A 1 31 SER 31 31 31 SER SER A . n 
A 1 32 ALA 32 32 32 ALA ALA A . n 
A 1 33 LYS 33 33 33 LYS LYS A . n 
A 1 34 THR 34 34 34 THR THR A . n 
A 1 35 ARG 35 35 35 ARG ARG A . n 
A 1 36 GLU 36 36 36 GLU GLU A . n 
A 1 37 LYS 37 37 37 LYS LYS A . n 
A 1 38 VAL 38 38 38 VAL VAL A . n 
A 1 39 GLU 39 39 39 GLU GLU A . n 
A 1 40 ALA 40 40 40 ALA ALA A . n 
A 1 41 ALA 41 41 41 ALA ALA A . n 
A 1 42 MET 42 42 42 MET MET A . n 
A 1 43 ALA 43 43 43 ALA ALA A . n 
A 1 44 GLU 44 44 44 GLU GLU A . n 
A 1 45 LEU 45 45 45 LEU LEU A . n 
A 1 46 ASN 46 46 46 ASN ASN A . n 
A 1 47 TYR 47 47 47 TYR TYR A . n 
A 1 48 ILE 48 48 48 ILE ILE A . n 
A 1 49 PRO 49 49 49 PRO PRO A . n 
A 1 50 ASN 50 50 50 ASN ASN A . n 
A 1 51 ARG 51 51 51 ARG ARG A . n 
A 1 52 CYS 52 52 52 CYS CYS A . n 
A 1 53 ALA 53 53 53 ALA ALA A . n 
A 1 54 GLN 54 54 54 GLN GLN A . n 
A 1 55 GLN 55 55 55 GLN GLN A . n 
A 1 56 LEU 56 56 56 LEU LEU A . n 
A 1 57 ALA 57 57 57 ALA ALA A . n 
A 1 58 GLY 58 58 58 GLY GLY A . n 
A 1 59 LYS 59 59 59 LYS LYS A . n 
A 1 60 GLN 60 60 60 GLN GLN A . n 
A 1 61 SER 61 61 61 SER SER A . n 
A 1 62 LEU 62 62 62 LEU LEU A . n 
B 1 1  MET 1  1  1  MET MET B . n 
B 1 2  LYS 2  2  2  LYS LYS B . n 
B 1 3  PRO 3  3  3  PRO PRO B . n 
B 1 4  VAL 4  4  4  VAL VAL B . n 
B 1 5  THR 5  5  5  THR THR B . n 
B 1 6  LEU 6  6  6  LEU LEU B . n 
B 1 7  TYR 7  7  7  TYR TYR B . n 
B 1 8  ASP 8  8  8  ASP ASP B . n 
B 1 9  VAL 9  9  9  VAL VAL B . n 
B 1 10 ALA 10 10 10 ALA ALA B . n 
B 1 11 GLU 11 11 11 GLU GLU B . n 
B 1 12 TYR 12 12 12 TYR TYR B . n 
B 1 13 ALA 13 13 13 ALA ALA B . n 
B 1 14 GLY 14 14 14 GLY GLY B . n 
B 1 15 VAL 15 15 15 VAL VAL B . n 
B 1 16 SER 16 16 16 SER SER B . n 
B 1 17 TYR 17 17 17 TYR TYR B . n 
B 1 18 GLN 18 18 18 GLN GLN B . n 
B 1 19 THR 19 19 19 THR THR B . n 
B 1 20 VAL 20 20 20 VAL VAL B . n 
B 1 21 SER 21 21 21 SER SER B . n 
B 1 22 ARG 22 22 22 ARG ARG B . n 
B 1 23 VAL 23 23 23 VAL VAL B . n 
B 1 24 VAL 24 24 24 VAL VAL B . n 
B 1 25 ASN 25 25 25 ASN ASN B . n 
B 1 26 GLN 26 26 26 GLN GLN B . n 
B 1 27 ALA 27 27 27 ALA ALA B . n 
B 1 28 SER 28 28 28 SER SER B . n 
B 1 29 HIS 29 29 29 HIS HIS B . n 
B 1 30 VAL 30 30 30 VAL VAL B . n 
B 1 31 SER 31 31 31 SER SER B . n 
B 1 32 ALA 32 32 32 ALA ALA B . n 
B 1 33 LYS 33 33 33 LYS LYS B . n 
B 1 34 THR 34 34 34 THR THR B . n 
B 1 35 ARG 35 35 35 ARG ARG B . n 
B 1 36 GLU 36 36 36 GLU GLU B . n 
B 1 37 LYS 37 37 37 LYS LYS B . n 
B 1 38 VAL 38 38 38 VAL VAL B . n 
B 1 39 GLU 39 39 39 GLU GLU B . n 
B 1 40 ALA 40 40 40 ALA ALA B . n 
B 1 41 ALA 41 41 41 ALA ALA B . n 
B 1 42 MET 42 42 42 MET MET B . n 
B 1 43 ALA 43 43 43 ALA ALA B . n 
B 1 44 GLU 44 44 44 GLU GLU B . n 
B 1 45 LEU 45 45 45 LEU LEU B . n 
B 1 46 ASN 46 46 46 ASN ASN B . n 
B 1 47 TYR 47 47 47 TYR TYR B . n 
B 1 48 ILE 48 48 48 ILE ILE B . n 
B 1 49 PRO 49 49 49 PRO PRO B . n 
B 1 50 ASN 50 50 50 ASN ASN B . n 
B 1 51 ARG 51 51 51 ARG ARG B . n 
B 1 52 CYS 52 52 52 CYS CYS B . n 
B 1 53 ALA 53 53 53 ALA ALA B . n 
B 1 54 GLN 54 54 54 GLN GLN B . n 
B 1 55 GLN 55 55 55 GLN GLN B . n 
B 1 56 LEU 56 56 56 LEU LEU B . n 
B 1 57 ALA 57 57 57 ALA ALA B . n 
B 1 58 GLY 58 58 58 GLY GLY B . n 
B 1 59 LYS 59 59 59 LYS LYS B . n 
B 1 60 GLN 60 60 60 GLN GLN B . n 
B 1 61 SER 61 61 61 SER SER B . n 
B 1 62 LEU 62 62 62 LEU LEU B . n 
C 2 1  DC  1  -1 -1 DC  DC  C . n 
C 2 2  DG  2  1  1  DG  DG  C . n 
C 2 3  DG  3  2  2  DG  DG  C . n 
C 2 4  DC  4  3  3  DC  DC  C . n 
C 2 5  DA  5  4  4  DA  DA  C . n 
C 2 6  DG  6  5  5  DG  DG  C . n 
C 2 7  DT  7  6  6  DT  DT  C . n 
C 2 8  DG  8  7  7  DG  DG  C . n 
C 2 9  DA  9  8  8  DA  DA  C . n 
C 2 10 DG  10 9  9  DG  DG  C . n 
C 2 11 DC  11 10 10 DC  DC  C . n 
C 2 12 DG  12 11 11 DG  DG  C . n 
C 2 13 DC  13 12 12 DC  DC  C . n 
C 2 14 DA  14 13 13 DA  DA  C . n 
C 2 15 DA  15 14 14 DA  DA  C . n 
C 2 16 DC  16 15 15 DC  DC  C . n 
C 2 17 DG  17 16 16 DG  DG  C . n 
C 2 18 DC  18 17 17 DC  DC  C . n 
C 2 19 DA  19 18 18 DA  DA  C . n 
C 2 20 DA  20 19 19 DA  DA  C . n 
C 2 21 DT  21 20 20 DT  DT  C . n 
C 2 22 DT  22 21 21 DT  DT  C . n 
C 2 23 DC  23 22 22 DC  DC  C . n 
D 3 1  DG  1  -1 -1 DG  DG  D . n 
D 3 2  DA  2  1  1  DA  DA  D . n 
D 3 3  DA  3  2  2  DA  DA  D . n 
D 3 4  DT  4  3  3  DT  DT  D . n 
D 3 5  DT  5  4  4  DT  DT  D . n 
D 3 6  DG  6  5  5  DG  DG  D . n 
D 3 7  DC  7  6  6  DC  DC  D . n 
D 3 8  DG  8  7  7  DG  DG  D . n 
D 3 9  DT  9  8  8  DT  DT  D . n 
D 3 10 DT  10 9  9  DT  DT  D . n 
D 3 11 DG  11 10 10 DG  DG  D . n 
D 3 12 DC  12 11 11 DC  DC  D . n 
D 3 13 DG  13 12 12 DG  DG  D . n 
D 3 14 DC  14 13 13 DC  DC  D . n 
D 3 15 DT  15 14 14 DT  DT  D . n 
D 3 16 DC  16 15 15 DC  DC  D . n 
D 3 17 DA  17 16 16 DA  DA  D . n 
D 3 18 DC  18 17 17 DC  DC  D . n 
D 3 19 DT  19 18 18 DT  DT  D . n 
D 3 20 DG  20 19 19 DG  DG  D . n 
D 3 21 DC  21 20 20 DC  DC  D . n 
D 3 22 DC  22 21 21 DC  DC  D . n 
D 3 23 DG  23 22 22 DG  DG  D . n 
# 
_pdbx_struct_assembly.id                   1 
_pdbx_struct_assembly.details              author_defined_assembly 
_pdbx_struct_assembly.method_details       ? 
_pdbx_struct_assembly.oligomeric_details   tetrameric 
_pdbx_struct_assembly.oligomeric_count     4 
# 
_pdbx_struct_assembly_gen.assembly_id       1 
_pdbx_struct_assembly_gen.oper_expression   1 
_pdbx_struct_assembly_gen.asym_id_list      A,B,C,D 
# 
_pdbx_struct_oper_list.id                   1 
_pdbx_struct_oper_list.type                 'identity operation' 
_pdbx_struct_oper_list.name                 1_555 
_pdbx_struct_oper_list.symmetry_operation   ? 
_pdbx_struct_oper_list.matrix[1][1]         1.0000000000 
_pdbx_struct_oper_list.matrix[1][2]         0.0000000000 
_pdbx_struct_oper_list.matrix[1][3]         0.0000000000 
_pdbx_struct_oper_list.vector[1]            0.0000000000 
_pdbx_struct_oper_list.matrix[2][1]         0.0000000000 
_pdbx_struct_oper_list.matrix[2][2]         1.0000000000 
_pdbx_struct_oper_list.matrix[2][3]         0.0000000000 
_pdbx_struct_oper_list.vector[2]            0.0000000000 
_pdbx_struct_oper_list.matrix[3][1]         0.0000000000 
_pdbx_struct_oper_list.matrix[3][2]         0.0000000000 
_pdbx_struct_oper_list.matrix[3][3]         1.0000000000 
_pdbx_struct_oper_list.vector[3]            0.0000000000 
# 
loop_
_pdbx_audit_revision_history.ordinal 
_pdbx_audit_revision_history.data_content_type 
_pdbx_audit_revision_history.major_revision 
_pdbx_audit_revision_history.minor_revision 
_pdbx_audit_revision_history.revision_date 
1 'Structure model' 1 0 2009-05-19 
2 'Structure model' 1 1 2011-07-13 
3 'Structure model' 1 2 2021-10-20 
# 
_pdbx_audit_revision_details.ordinal             1 
_pdbx_audit_revision_details.revision_ordinal    1 
_pdbx_audit_revision_details.data_content_type   'Structure model' 
_pdbx_audit_revision_details.provider            repository 
_pdbx_audit_revision_details.type                'Initial release' 
_pdbx_audit_revision_details.description         ? 
_pdbx_audit_revision_details.details             ? 
# 
loop_
_pdbx_audit_revision_group.ordinal 
_pdbx_audit_revision_group.revision_ordinal 
_pdbx_audit_revision_group.data_content_type 
_pdbx_audit_revision_group.group 
1 2 'Structure model' 'Version format compliance' 
2 3 'Structure model' 'Data collection'           
3 3 'Structure model' 'Database references'       
4 3 'Structure model' 'Derived calculations'      
# 
loop_
_pdbx_audit_revision_category.ordinal 
_pdbx_audit_revision_category.revision_ordinal 
_pdbx_audit_revision_category.data_content_type 
_pdbx_audit_revision_category.category 
1 3 'Structure model' database_2            
2 3 'Structure model' pdbx_nmr_software     
3 3 'Structure model' pdbx_nmr_spectrometer 
4 3 'Structure model' pdbx_struct_assembly  
5 3 'Structure model' pdbx_struct_oper_list 
6 3 'Structure model' struct_ref_seq        
7 3 'Structure model' struct_ref_seq_dif    
# 
loop_
_pdbx_audit_revision_item.ordinal 
_pdbx_audit_revision_item.revision_ordinal 
_pdbx_audit_revision_item.data_content_type 
_pdbx_audit_revision_item.item 
1 3 'Structure model' '_database_2.pdbx_DOI'                
2 3 'Structure model' '_database_2.pdbx_database_accession' 
3 3 'Structure model' '_pdbx_nmr_software.name'             
4 3 'Structure model' '_pdbx_nmr_spectrometer.model'        
5 3 'Structure model' '_struct_ref_seq.db_align_beg'        
6 3 'Structure model' '_struct_ref_seq.db_align_end'        
7 3 'Structure model' '_struct_ref_seq_dif.details'         
# 
loop_
_pdbx_nmr_exptl_sample.component 
_pdbx_nmr_exptl_sample.concentration 
_pdbx_nmr_exptl_sample.concentration_range 
_pdbx_nmr_exptl_sample.concentration_units 
_pdbx_nmr_exptl_sample.isotopic_labeling 
_pdbx_nmr_exptl_sample.solution_id 
;DNA (5'-strand1-3')
;
0.7  ? mM ?             1 
;DNA (5'-strand2-3')
;
0.7  ? mM ?             1 
'Lac headpiece dimer' 0.7  ? mM ?             1 
D2O                   5    ? %  ?             1 
'potassium phosphate' 10   ? mM ?             1 
'potassium chloride'  20   ? mM ?             1 
d8-glycerol           5    ? %  '[U-100% 2H]' 1 
'sodium azide'        0.01 ? %  ?             1 
# 
loop_
_pdbx_validate_close_contact.id 
_pdbx_validate_close_contact.PDB_model_num 
_pdbx_validate_close_contact.auth_atom_id_1 
_pdbx_validate_close_contact.auth_asym_id_1 
_pdbx_validate_close_contact.auth_comp_id_1 
_pdbx_validate_close_contact.auth_seq_id_1 
_pdbx_validate_close_contact.PDB_ins_code_1 
_pdbx_validate_close_contact.label_alt_id_1 
_pdbx_validate_close_contact.auth_atom_id_2 
_pdbx_validate_close_contact.auth_asym_id_2 
_pdbx_validate_close_contact.auth_comp_id_2 
_pdbx_validate_close_contact.auth_seq_id_2 
_pdbx_validate_close_contact.PDB_ins_code_2 
_pdbx_validate_close_contact.label_alt_id_2 
_pdbx_validate_close_contact.dist 
1  1  O2     C DC  -1 ? ? H22   D DG  22 ? ? 0.99 
2  1  H22    C DG  1  ? ? O2    D DC  21 ? ? 1.50 
3  1  N3     C DC  -1 ? ? H1    D DG  22 ? ? 1.58 
4  1  OE1    A GLU 36 ? ? HZ1   A LYS 37 ? ? 1.60 
5  1  O2     C DC  -1 ? ? N2    D DG  22 ? ? 1.97 
6  2  O2     C DC  -1 ? ? H22   D DG  22 ? ? 0.99 
7  2  H22    C DG  1  ? ? O2    D DC  21 ? ? 1.33 
8  2  N3     C DC  -1 ? ? H1    D DG  22 ? ? 1.53 
9  2  "H2''" D DC  11 ? ? "O5'" D DG  12 ? ? 1.55 
10 2  O2     C DC  -1 ? ? N2    D DG  22 ? ? 1.98 
11 3  O2     C DC  -1 ? ? H22   D DG  22 ? ? 0.98 
12 3  H22    C DG  1  ? ? O2    D DC  21 ? ? 1.46 
13 3  N3     C DC  -1 ? ? H1    D DG  22 ? ? 1.51 
14 3  H22    C DG  2  ? ? O2    D DC  20 ? ? 1.60 
15 3  O2     C DC  -1 ? ? N2    D DG  22 ? ? 1.97 
16 4  O2     C DC  -1 ? ? H22   D DG  22 ? ? 1.00 
17 4  H22    C DG  1  ? ? O2    D DC  21 ? ? 1.46 
18 4  "H2''" D DC  11 ? ? "O5'" D DG  12 ? ? 1.48 
19 4  N3     C DC  -1 ? ? H1    D DG  22 ? ? 1.49 
20 4  O2     C DC  3  ? ? H22   D DG  19 ? ? 1.55 
21 4  H22    C DG  9  ? ? O2    D DC  13 ? ? 1.58 
22 4  HH12   A ARG 35 ? ? OE2   A GLU 39 ? ? 1.58 
23 4  O2     C DC  -1 ? ? N2    D DG  22 ? ? 1.98 
24 5  O2     C DC  -1 ? ? H22   D DG  22 ? ? 1.01 
25 5  H22    C DG  1  ? ? O2    D DC  21 ? ? 1.49 
26 5  N3     C DC  -1 ? ? H1    D DG  22 ? ? 1.55 
27 5  H22    C DG  5  ? ? O2    D DC  17 ? ? 1.58 
28 5  H22    C DG  11 ? ? O2    D DC  11 ? ? 1.59 
29 5  O2     C DC  -1 ? ? N2    D DG  22 ? ? 1.99 
30 6  O2     C DC  -1 ? ? H22   D DG  22 ? ? 0.97 
31 6  H22    C DG  1  ? ? O2    D DC  21 ? ? 1.47 
32 6  N3     C DC  -1 ? ? H1    D DG  22 ? ? 1.51 
33 6  O4     C DT  6  ? ? H62   D DA  16 ? ? 1.60 
34 6  O2     C DC  -1 ? ? N2    D DG  22 ? ? 1.97 
35 7  O2     C DC  -1 ? ? H22   D DG  22 ? ? 0.99 
36 7  H22    C DG  1  ? ? O2    D DC  21 ? ? 1.47 
37 7  N3     C DC  -1 ? ? H1    D DG  22 ? ? 1.49 
38 7  H22    C DG  2  ? ? O2    D DC  20 ? ? 1.50 
39 7  O2     C DC  -1 ? ? N2    D DG  22 ? ? 1.98 
40 8  O2     C DC  -1 ? ? H22   D DG  22 ? ? 0.98 
41 8  N3     C DC  -1 ? ? H1    D DG  22 ? ? 1.45 
42 8  H22    C DG  1  ? ? O2    D DC  21 ? ? 1.45 
43 8  HH22   A ARG 35 ? ? OE2   A GLU 39 ? ? 1.56 
44 8  H22    C DG  2  ? ? O2    D DC  20 ? ? 1.56 
45 8  O2     C DC  -1 ? ? N2    D DG  22 ? ? 1.98 
46 9  O2     C DC  -1 ? ? H22   D DG  22 ? ? 0.97 
47 9  N3     C DC  -1 ? ? H1    D DG  22 ? ? 1.47 
48 9  H22    C DG  1  ? ? O2    D DC  21 ? ? 1.48 
49 9  O2     C DC  -1 ? ? N2    D DG  22 ? ? 1.97 
50 10 O2     C DC  -1 ? ? H22   D DG  22 ? ? 0.99 
51 10 H22    C DG  1  ? ? O2    D DC  21 ? ? 1.42 
52 10 N3     C DC  -1 ? ? H1    D DG  22 ? ? 1.52 
53 10 O2     C DC  12 ? ? H22   D DG  10 ? ? 1.59 
54 10 O2     C DC  -1 ? ? N2    D DG  22 ? ? 1.98 
# 
loop_
_pdbx_validate_torsion.id 
_pdbx_validate_torsion.PDB_model_num 
_pdbx_validate_torsion.auth_comp_id 
_pdbx_validate_torsion.auth_asym_id 
_pdbx_validate_torsion.auth_seq_id 
_pdbx_validate_torsion.PDB_ins_code 
_pdbx_validate_torsion.label_alt_id 
_pdbx_validate_torsion.phi 
_pdbx_validate_torsion.psi 
1   1  THR A 5  ? ? -110.42 -168.43 
2   1  GLN A 26 ? ? -134.02 -33.50  
3   1  SER A 28 ? ? -72.82  -134.97 
4   1  SER A 31 ? ? 67.31   -7.85   
5   1  ALA A 32 ? ? 75.12   -27.96  
6   1  PRO A 49 ? ? -67.99  50.64   
7   1  ASN A 50 ? ? 54.76   -160.15 
8   1  ARG A 51 ? ? -145.13 -40.16  
9   1  TYR B 17 ? ? 70.97   -56.23  
10  1  ASN B 25 ? ? -103.55 -63.89  
11  1  GLN B 26 ? ? -167.40 54.53   
12  1  SER B 28 ? ? -124.44 -85.33  
13  1  ASN B 46 ? ? 65.16   86.14   
14  1  CYS B 52 ? ? -158.43 -69.84  
15  2  PRO A 3  ? ? -62.97  88.92   
16  2  GLN A 26 ? ? -160.22 -32.30  
17  2  SER A 31 ? ? 65.19   -23.67  
18  2  ALA A 32 ? ? 72.72   -19.63  
19  2  ASN A 46 ? ? 64.99   83.29   
20  2  PRO A 49 ? ? -63.99  18.09   
21  2  ASN A 50 ? ? 60.09   165.06  
22  2  ALA A 53 ? ? 174.49  -44.76  
23  2  VAL B 24 ? ? -67.52  -74.05  
24  2  ASN B 25 ? ? -155.33 67.00   
25  2  GLN B 26 ? ? -139.39 -66.42  
26  2  HIS B 29 ? ? -81.34  41.49   
27  2  PRO B 49 ? ? -43.98  95.87   
28  2  ALA B 53 ? ? 176.95  -25.70  
29  2  LYS B 59 ? ? -91.74  55.04   
30  3  PRO A 3  ? ? -75.91  46.81   
31  3  THR A 5  ? ? -126.50 -169.53 
32  3  ASN A 25 ? ? -94.68  -65.64  
33  3  SER A 28 ? ? -91.68  -155.08 
34  3  HIS A 29 ? ? -66.64  99.60   
35  3  VAL A 30 ? ? -106.76 69.76   
36  3  SER A 31 ? ? 67.69   -18.96  
37  3  PRO A 49 ? ? -66.98  30.73   
38  3  ASN A 50 ? ? 57.93   -173.48 
39  3  ARG A 51 ? ? -137.31 -42.97  
40  3  LEU A 56 ? ? -58.35  -7.11   
41  3  LYS A 59 ? ? 63.91   -139.49 
42  3  GLN A 60 ? ? 64.38   -74.15  
43  3  LYS B 2  ? ? -150.82 -52.32  
44  3  TYR B 17 ? ? 58.30   17.39   
45  3  ASN B 25 ? ? -95.86  -76.67  
46  3  SER B 28 ? ? -142.07 -80.42  
47  3  HIS B 29 ? ? -99.75  57.50   
48  3  PRO B 49 ? ? -50.68  99.31   
49  3  CYS B 52 ? ? -176.30 -69.34  
50  4  ASN A 25 ? ? -90.91  -64.40  
51  4  GLN A 26 ? ? -65.95  -73.01  
52  4  SER A 28 ? ? -115.16 -82.64  
53  4  SER A 31 ? ? 60.07   -2.64   
54  4  LYS A 33 ? ? -150.84 -57.11  
55  4  THR A 34 ? ? -81.74  31.56   
56  4  PRO A 49 ? ? -67.38  15.25   
57  4  ASN A 50 ? ? 59.92   -171.97 
58  4  ARG A 51 ? ? -135.31 -34.77  
59  4  LYS A 59 ? ? 53.24   -145.16 
60  4  GLN A 60 ? ? 58.48   -163.52 
61  4  TYR B 17 ? ? 73.54   -60.59  
62  4  ASN B 25 ? ? -110.27 -73.41  
63  4  SER B 28 ? ? -108.82 -78.60  
64  4  HIS B 29 ? ? -102.49 48.81   
65  4  ASN B 46 ? ? 60.69   77.60   
66  4  PRO B 49 ? ? -49.51  103.81  
67  4  CYS B 52 ? ? -167.48 -64.40  
68  4  LEU B 56 ? ? -86.39  49.54   
69  4  ALA B 57 ? ? -155.84 -13.04  
70  5  THR A 5  ? ? -121.01 -169.16 
71  5  ALA A 27 ? ? 66.58   65.39   
72  5  SER A 28 ? ? -104.78 -142.61 
73  5  SER A 31 ? ? 67.10   -40.10  
74  5  LYS A 33 ? ? -133.86 -38.88  
75  5  ASN A 46 ? ? 72.91   105.94  
76  5  PRO A 49 ? ? -66.12  19.93   
77  5  ASN A 50 ? ? 59.84   -174.02 
78  5  GLN A 60 ? ? 53.60   -105.40 
79  5  LYS B 2  ? ? -130.67 -55.64  
80  5  SER B 16 ? ? -89.83  33.75   
81  5  TYR B 17 ? ? 67.46   -47.12  
82  5  ASN B 25 ? ? -95.83  -81.77  
83  5  GLN B 26 ? ? -154.10 88.84   
84  5  PRO B 49 ? ? -56.01  96.54   
85  5  CYS B 52 ? ? -167.11 -74.57  
86  5  GLN B 60 ? ? -62.12  -74.09  
87  5  SER B 61 ? ? -152.25 23.86   
88  6  PRO A 3  ? ? -61.88  89.79   
89  6  LEU A 6  ? ? -55.30  -8.10   
90  6  SER A 28 ? ? -88.13  -79.34  
91  6  SER A 31 ? ? 64.58   -21.81  
92  6  ALA A 32 ? ? 74.07   -5.50   
93  6  ASN A 46 ? ? 73.74   93.81   
94  6  PRO A 49 ? ? -64.07  26.03   
95  6  ASN A 50 ? ? 57.89   169.01  
96  6  ALA A 53 ? ? 178.68  -52.70  
97  6  LYS B 2  ? ? -170.59 -55.36  
98  6  VAL B 15 ? ? -127.91 -168.28 
99  6  ASN B 25 ? ? -173.49 35.88   
100 6  HIS B 29 ? ? -71.98  40.48   
101 6  PRO B 49 ? ? -43.34  101.01  
102 6  ALA B 53 ? ? 171.25  -25.19  
103 6  LYS B 59 ? ? -146.20 59.64   
104 7  PRO A 3  ? ? -48.38  94.99   
105 7  ALA A 32 ? ? 68.94   -52.59  
106 7  PRO A 49 ? ? -65.97  21.06   
107 7  ASN A 50 ? ? 53.85   -150.87 
108 7  ARG A 51 ? ? -170.39 -37.51  
109 7  VAL B 4  ? ? -168.98 93.13   
110 7  VAL B 24 ? ? -70.80  -72.26  
111 7  ASN B 25 ? ? -164.56 79.03   
112 7  GLN B 26 ? ? -151.68 -66.30  
113 7  HIS B 29 ? ? -69.04  66.14   
114 7  ASN B 46 ? ? 56.50   73.81   
115 7  PRO B 49 ? ? -48.91  106.58  
116 7  ALA B 53 ? ? 179.12  -24.62  
117 7  ALA B 57 ? ? -103.52 74.86   
118 8  GLN A 26 ? ? -146.07 -11.96  
119 8  SER A 28 ? ? -101.51 -60.31  
120 8  VAL A 30 ? ? -138.01 -31.21  
121 8  ALA A 32 ? ? 70.97   -43.03  
122 8  ASN A 46 ? ? 68.13   97.03   
123 8  PRO A 49 ? ? -58.57  4.22    
124 8  ASN A 50 ? ? 68.13   168.87  
125 8  GLN B 18 ? ? -161.56 -23.05  
126 8  ASN B 25 ? ? -152.71 27.04   
127 8  SER B 28 ? ? -77.59  -71.41  
128 8  PRO B 49 ? ? -30.32  105.33  
129 8  ALA B 53 ? ? -168.27 -18.02  
130 9  SER A 28 ? ? -108.69 -75.66  
131 9  HIS A 29 ? ? -109.43 78.66   
132 9  VAL A 30 ? ? -93.89  58.53   
133 9  SER A 31 ? ? 64.81   -18.67  
134 9  ALA A 32 ? ? 72.52   -49.27  
135 9  PRO A 49 ? ? -55.36  0.58    
136 9  ASN A 50 ? ? 58.81   -168.34 
137 9  ARG A 51 ? ? -148.49 -35.70  
138 9  GLN B 18 ? ? 158.15  -58.80  
139 9  ASN B 25 ? ? -117.01 -73.88  
140 9  GLN B 26 ? ? -165.09 77.39   
141 9  HIS B 29 ? ? -80.99  32.07   
142 9  SER B 31 ? ? -65.76  -112.89 
143 9  ALA B 32 ? ? -148.63 -55.45  
144 9  PRO B 49 ? ? -54.74  95.89   
145 9  ALA B 53 ? ? 172.70  -13.10  
146 10 GLN A 26 ? ? -143.97 -12.11  
147 10 SER A 28 ? ? -92.81  -82.80  
148 10 SER A 31 ? ? 70.08   -25.89  
149 10 ALA A 32 ? ? 77.70   -6.32   
150 10 ASN A 46 ? ? 76.94   54.28   
151 10 PRO A 49 ? ? -72.87  34.38   
152 10 ASN A 50 ? ? 49.56   -168.72 
153 10 ARG A 51 ? ? -94.89  -66.93  
154 10 GLN A 55 ? ? -93.05  33.80   
155 10 SER A 61 ? ? -86.81  49.20   
156 10 GLN B 18 ? ? -167.14 -38.45  
157 10 ASN B 25 ? ? -172.50 29.24   
158 10 SER B 28 ? ? -136.00 -56.97  
159 10 ASN B 46 ? ? 62.08   80.72   
160 10 ALA B 53 ? ? -167.38 -23.54  
# 
loop_
_ndb_struct_conf_na.entry_id 
_ndb_struct_conf_na.feature 
2KEK 'double helix'        
2KEK 'b-form double helix' 
# 
loop_
_ndb_struct_na_base_pair.model_number 
_ndb_struct_na_base_pair.i_label_asym_id 
_ndb_struct_na_base_pair.i_label_comp_id 
_ndb_struct_na_base_pair.i_label_seq_id 
_ndb_struct_na_base_pair.i_symmetry 
_ndb_struct_na_base_pair.j_label_asym_id 
_ndb_struct_na_base_pair.j_label_comp_id 
_ndb_struct_na_base_pair.j_label_seq_id 
_ndb_struct_na_base_pair.j_symmetry 
_ndb_struct_na_base_pair.shear 
_ndb_struct_na_base_pair.stretch 
_ndb_struct_na_base_pair.stagger 
_ndb_struct_na_base_pair.buckle 
_ndb_struct_na_base_pair.propeller 
_ndb_struct_na_base_pair.opening 
_ndb_struct_na_base_pair.pair_number 
_ndb_struct_na_base_pair.pair_name 
_ndb_struct_na_base_pair.i_auth_asym_id 
_ndb_struct_na_base_pair.i_auth_seq_id 
_ndb_struct_na_base_pair.i_PDB_ins_code 
_ndb_struct_na_base_pair.j_auth_asym_id 
_ndb_struct_na_base_pair.j_auth_seq_id 
_ndb_struct_na_base_pair.j_PDB_ins_code 
_ndb_struct_na_base_pair.hbond_type_28 
_ndb_struct_na_base_pair.hbond_type_12 
1 C DC 1  1_555 D DG 23 1_555 0.318  -0.309 0.142  -1.560 -1.948 11.969 1  C_DC-1:DG22_D C -1 ? D 22 ? 22 1 
1 C DG 2  1_555 D DC 22 1_555 -0.241 -0.054 -0.015 -1.000 -3.005 6.538  2  C_DG1:DC21_D  C 1  ? D 21 ? 19 1 
1 C DG 3  1_555 D DC 21 1_555 -0.480 -0.321 0.213  0.476  -3.163 -0.956 3  C_DG2:DC20_D  C 2  ? D 20 ? 19 1 
1 C DC 4  1_555 D DG 20 1_555 0.299  -0.195 0.128  -0.154 -1.579 -0.344 4  C_DC3:DG19_D  C 3  ? D 19 ? 19 1 
1 C DA 5  1_555 D DT 19 1_555 0.052  -0.254 0.209  -0.095 -5.682 -4.876 5  C_DA4:DT18_D  C 4  ? D 18 ? 20 1 
1 C DG 6  1_555 D DC 18 1_555 -0.078 -0.168 0.115  0.120  -1.304 -4.074 6  C_DG5:DC17_D  C 5  ? D 17 ? 19 1 
1 C DT 7  1_555 D DA 17 1_555 -0.194 -0.170 0.011  -0.323 -3.185 -6.342 7  C_DT6:DA16_D  C 6  ? D 16 ? 20 1 
1 C DG 8  1_555 D DC 16 1_555 0.009  -0.095 -0.012 -3.436 -2.601 -2.211 8  C_DG7:DC15_D  C 7  ? D 15 ? 19 1 
1 C DA 9  1_555 D DT 15 1_555 0.039  -0.192 0.009  -1.154 -4.856 -1.707 9  C_DA8:DT14_D  C 8  ? D 14 ? 20 1 
1 C DG 10 1_555 D DC 14 1_555 -0.504 -0.190 0.084  -0.340 -2.410 2.227  10 C_DG9:DC13_D  C 9  ? D 13 ? 19 1 
1 C DC 11 1_555 D DG 13 1_555 0.040  -0.076 0.022  3.727  -1.960 -2.178 11 C_DC10:DG12_D C 10 ? D 12 ? 19 1 
1 C DG 12 1_555 D DC 12 1_555 -0.034 -0.255 -0.070 -4.183 1.260  -2.640 12 C_DG11:DC11_D C 11 ? D 11 ? 19 1 
1 C DC 13 1_555 D DG 11 1_555 0.015  -0.130 0.135  -1.890 -0.371 -3.026 13 C_DC12:DG10_D C 12 ? D 10 ? 19 1 
1 C DA 14 1_555 D DT 10 1_555 0.081  -0.179 0.082  -0.051 -3.049 -7.141 14 C_DA13:DT9_D  C 13 ? D 9  ? 20 1 
1 C DA 15 1_555 D DT 9  1_555 -0.004 -0.201 0.198  0.775  -1.658 -5.246 15 C_DA14:DT8_D  C 14 ? D 8  ? 20 1 
1 C DC 16 1_555 D DG 8  1_555 0.209  -0.134 0.127  1.338  -0.456 0.091  16 C_DC15:DG7_D  C 15 ? D 7  ? 19 1 
1 C DG 17 1_555 D DC 7  1_555 -0.023 -0.087 0.032  -0.043 -1.909 2.290  17 C_DG16:DC6_D  C 16 ? D 6  ? 19 1 
1 C DC 18 1_555 D DG 6  1_555 0.169  -0.142 -0.040 -1.299 2.053  -1.956 18 C_DC17:DG5_D  C 17 ? D 5  ? 19 1 
1 C DA 19 1_555 D DT 5  1_555 0.304  -0.106 -0.104 -1.185 -2.607 -6.056 19 C_DA18:DT4_D  C 18 ? D 4  ? 20 1 
1 C DA 20 1_555 D DT 4  1_555 0.130  -0.124 -0.006 1.434  -2.534 -1.066 20 C_DA19:DT3_D  C 19 ? D 3  ? 20 1 
1 C DT 21 1_555 D DA 3  1_555 -0.012 -0.157 0.139  -0.136 -6.766 -0.786 21 C_DT20:DA2_D  C 20 ? D 2  ? 20 1 
1 C DT 22 1_555 D DA 2  1_555 -0.404 -0.069 0.027  -0.193 -1.214 -0.327 22 C_DT21:DA1_D  C 21 ? D 1  ? 20 1 
1 C DC 23 1_555 D DG 1  1_555 0.491  -0.218 -0.019 3.222  -3.059 0.423  23 C_DC22:DG-1_D C 22 ? D -1 ? 19 1 
# 
loop_
_ndb_struct_na_base_pair_step.model_number 
_ndb_struct_na_base_pair_step.i_label_asym_id_1 
_ndb_struct_na_base_pair_step.i_label_comp_id_1 
_ndb_struct_na_base_pair_step.i_label_seq_id_1 
_ndb_struct_na_base_pair_step.i_symmetry_1 
_ndb_struct_na_base_pair_step.j_label_asym_id_1 
_ndb_struct_na_base_pair_step.j_label_comp_id_1 
_ndb_struct_na_base_pair_step.j_label_seq_id_1 
_ndb_struct_na_base_pair_step.j_symmetry_1 
_ndb_struct_na_base_pair_step.i_label_asym_id_2 
_ndb_struct_na_base_pair_step.i_label_comp_id_2 
_ndb_struct_na_base_pair_step.i_label_seq_id_2 
_ndb_struct_na_base_pair_step.i_symmetry_2 
_ndb_struct_na_base_pair_step.j_label_asym_id_2 
_ndb_struct_na_base_pair_step.j_label_comp_id_2 
_ndb_struct_na_base_pair_step.j_label_seq_id_2 
_ndb_struct_na_base_pair_step.j_symmetry_2 
_ndb_struct_na_base_pair_step.shift 
_ndb_struct_na_base_pair_step.slide 
_ndb_struct_na_base_pair_step.rise 
_ndb_struct_na_base_pair_step.tilt 
_ndb_struct_na_base_pair_step.roll 
_ndb_struct_na_base_pair_step.twist 
_ndb_struct_na_base_pair_step.x_displacement 
_ndb_struct_na_base_pair_step.y_displacement 
_ndb_struct_na_base_pair_step.helical_rise 
_ndb_struct_na_base_pair_step.inclination 
_ndb_struct_na_base_pair_step.tip 
_ndb_struct_na_base_pair_step.helical_twist 
_ndb_struct_na_base_pair_step.step_number 
_ndb_struct_na_base_pair_step.step_name 
_ndb_struct_na_base_pair_step.i_auth_asym_id_1 
_ndb_struct_na_base_pair_step.i_auth_seq_id_1 
_ndb_struct_na_base_pair_step.i_PDB_ins_code_1 
_ndb_struct_na_base_pair_step.j_auth_asym_id_1 
_ndb_struct_na_base_pair_step.j_auth_seq_id_1 
_ndb_struct_na_base_pair_step.j_PDB_ins_code_1 
_ndb_struct_na_base_pair_step.i_auth_asym_id_2 
_ndb_struct_na_base_pair_step.i_auth_seq_id_2 
_ndb_struct_na_base_pair_step.i_PDB_ins_code_2 
_ndb_struct_na_base_pair_step.j_auth_asym_id_2 
_ndb_struct_na_base_pair_step.j_auth_seq_id_2 
_ndb_struct_na_base_pair_step.j_PDB_ins_code_2 
1 C DC 1  1_555 D DG 23 1_555 C DG 2  1_555 D DC 22 1_555 -0.598 0.331  3.076 0.501  5.643   31.443 -0.369 1.172  3.078 10.308  
-0.915  31.936 1  CC_DC-1DG1:DC21DG22_DD  C -1 ? D 22 ? C 1  ? D 21 ? 
1 C DG 2  1_555 D DC 22 1_555 C DG 3  1_555 D DC 21 1_555 -0.984 0.767  3.243 -5.019 6.478   34.555 0.278  0.855  3.432 10.720  
8.305   35.485 2  CC_DG1DG2:DC20DC21_DD   C 1  ? D 21 ? C 2  ? D 20 ? 
1 C DG 3  1_555 D DC 21 1_555 C DC 4  1_555 D DG 20 1_555 0.775  0.681  3.429 0.998  1.325   42.133 0.803  -0.970 3.465 1.842   
-1.388  42.164 3  CC_DG2DC3:DG19DC20_DD   C 2  ? D 20 ? C 3  ? D 19 ? 
1 C DC 4  1_555 D DG 20 1_555 C DA 5  1_555 D DT 19 1_555 -0.498 0.874  3.265 -5.820 -8.439  37.407 2.333  0.050  3.045 -12.864 
8.873   38.738 4  CC_DC3DA4:DT18DG19_DD   C 3  ? D 19 ? C 4  ? D 18 ? 
1 C DA 5  1_555 D DT 19 1_555 C DG 6  1_555 D DC 18 1_555 -0.531 0.464  3.492 2.783  -11.792 38.354 2.078  1.105  3.175 -17.425 
-4.113  40.153 5  CC_DA4DG5:DC17DT18_DD   C 4  ? D 18 ? C 5  ? D 17 ? 
1 C DG 6  1_555 D DC 18 1_555 C DT 7  1_555 D DA 17 1_555 -0.028 0.927  3.784 -1.412 -0.871  35.651 1.658  -0.190 3.759 -1.422  
2.305   35.688 6  CC_DG5DT6:DA16DC17_DD   C 5  ? D 17 ? C 6  ? D 16 ? 
1 C DT 7  1_555 D DA 17 1_555 C DG 8  1_555 D DC 16 1_555 -0.059 0.282  3.399 0.328  8.632   31.972 -1.037 0.162  3.358 15.325  
-0.582  33.089 7  CC_DT6DG7:DC15DA16_DD   C 6  ? D 16 ? C 7  ? D 15 ? 
1 C DG 8  1_555 D DC 16 1_555 C DA 9  1_555 D DT 15 1_555 -0.094 0.610  3.359 -3.691 15.991  30.526 -1.642 -0.457 3.262 27.977  
6.457   34.565 8  CC_DG7DA8:DT14DC15_DD   C 7  ? D 15 ? C 8  ? D 14 ? 
1 C DA 9  1_555 D DT 15 1_555 C DG 10 1_555 D DC 14 1_555 -0.065 0.564  3.305 -6.280 5.517   34.222 0.090  -0.853 3.313 9.205   
10.480  35.198 9  CC_DA8DG9:DC13DT14_DD   C 8  ? D 14 ? C 9  ? D 13 ? 
1 C DG 10 1_555 D DC 14 1_555 C DC 11 1_555 D DG 13 1_555 -1.097 0.376  2.883 -0.153 4.365   32.846 0.005  1.901  2.913 7.676   
0.269   33.127 10 CC_DG9DC10:DG12DC13_DD  C 9  ? D 13 ? C 10 ? D 12 ? 
1 C DC 11 1_555 D DG 13 1_555 C DG 12 1_555 D DC 12 1_555 -0.603 1.828  3.997 1.269  36.270  27.552 -2.596 0.958  3.892 53.966  
-1.888  45.283 11 CC_DC10DG11:DC11DG12_DD C 10 ? D 12 ? C 11 ? D 11 ? 
1 C DG 12 1_555 D DC 12 1_555 C DC 13 1_555 D DG 11 1_555 -0.025 1.806  3.347 0.608  2.686   33.947 2.637  0.143  3.475 4.592   
-1.039  34.055 12 CC_DG11DC12:DG10DC11_DD C 11 ? D 11 ? C 12 ? D 10 ? 
1 C DC 13 1_555 D DG 11 1_555 C DA 14 1_555 D DT 10 1_555 -0.576 0.252  3.190 -3.247 11.766  29.214 -1.722 0.454  3.103 22.147  
6.112   31.610 13 CC_DC12DA13:DT9DG10_DD  C 12 ? D 10 ? C 13 ? D 9  ? 
1 C DA 14 1_555 D DT 10 1_555 C DA 15 1_555 D DT 9  1_555 -0.410 0.449  3.440 -3.129 18.080  33.098 -1.877 0.189  3.273 29.121  
5.040   37.718 14 CC_DA13DA14:DT8DT9_DD   C 13 ? D 9  ? C 14 ? D 8  ? 
1 C DA 15 1_555 D DT 9  1_555 C DC 16 1_555 D DG 8  1_555 -0.511 1.423  3.989 3.724  -14.674 30.366 5.092  1.549  2.931 -26.076 
-6.619  33.852 15 CC_DA14DC15:DG7DT8_DD   C 14 ? D 8  ? C 15 ? D 7  ? 
1 C DC 16 1_555 D DG 8  1_555 C DG 17 1_555 D DC 7  1_555 -0.241 2.260  3.790 7.128  29.324  13.723 -4.021 2.365  3.532 64.231  
-15.613 33.085 16 CC_DC15DG16:DC6DG7_DD   C 15 ? D 7  ? C 16 ? D 6  ? 
1 C DG 17 1_555 D DC 7  1_555 C DC 18 1_555 D DG 6  1_555 -0.209 2.297  3.433 0.953  10.475  26.532 1.837  0.681  4.022 21.767  
-1.980  28.506 17 CC_DG16DC17:DG5DC6_DD   C 16 ? D 6  ? C 17 ? D 5  ? 
1 C DC 18 1_555 D DG 6  1_555 C DA 19 1_555 D DT 5  1_555 -0.967 0.679  4.302 -9.537 13.219  26.065 -2.413 -0.840 4.252 26.290  
18.968  30.668 18 CC_DC17DA18:DT4DG5_DD   C 17 ? D 5  ? C 18 ? D 4  ? 
1 C DA 19 1_555 D DT 5  1_555 C DA 20 1_555 D DT 4  1_555 0.022  0.740  3.273 -1.532 -12.493 37.186 2.550  -0.209 2.883 -18.938 
2.322   39.187 19 CC_DA18DA19:DT3DT4_DD   C 18 ? D 4  ? C 19 ? D 3  ? 
1 C DA 20 1_555 D DT 4  1_555 C DT 21 1_555 D DA 3  1_555 -0.201 -0.516 3.387 -3.303 -0.870  33.578 -0.742 -0.211 3.402 -1.501  
5.699   33.746 20 CC_DA19DT20:DA2DT3_DD   C 19 ? D 3  ? C 20 ? D 2  ? 
1 C DT 21 1_555 D DA 3  1_555 C DT 22 1_555 D DA 2  1_555 0.121  0.296  3.178 3.266  -11.259 37.316 1.749  0.198  2.969 -17.087 
-4.957  39.052 21 CC_DT20DT21:DA1DA2_DD   C 20 ? D 2  ? C 21 ? D 1  ? 
1 C DT 22 1_555 D DA 2  1_555 C DC 23 1_555 D DG 1  1_555 0.058  0.334  3.424 -0.824 -2.347  40.878 0.745  -0.177 3.399 -3.357  
1.178   40.950 22 CC_DT21DC22:DG-1DA1_DD  C 21 ? D 1  ? C 22 ? D -1 ? 
#