data_2KEI
# 
_entry.id   2KEI 
# 
_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   2KEI         pdb_00002kei 10.2210/pdb2kei/pdb 
RCSB  RCSB101021   ?            ?                   
WWPDB D_1000101021 ?            ?                   
# 
loop_
_pdbx_database_related.content_type 
_pdbx_database_related.db_id 
_pdbx_database_related.db_name 
_pdbx_database_related.details 
unspecified 1L1M PDB .                                               
unspecified 2KEK PDB 'Same protein bound to its natural operator O3' 
unspecified 2KEJ PDB 'Same protein bound to its natural operator O2' 
# 
_pdbx_database_status.deposit_site                    BMRB 
_pdbx_database_status.entry_id                        2KEI 
_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           2KEI 
_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                         2KEI 
_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(*GP*AP*AP*TP*TP*GP*TP*GP*AP*GP*CP*GP*GP*AP*TP*AP*AP*CP*AP*AP*TP*TP*T)-3')
;
7143.645 1 ? ?    ?                   ? 
3 polymer syn 
;DNA (5'-D(P*AP*AP*AP*TP*TP*GP*TP*TP*AP*TP*CP*CP*GP*CP*TP*CP*AP*CP*AP*AP*TP*TP*C)-3')
;
6974.534 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 
;(DG)(DA)(DA)(DT)(DT)(DG)(DT)(DG)(DA)(DG)(DC)(DG)(DG)(DA)(DT)(DA)(DA)(DC)(DA)(DA)
(DT)(DT)(DT)
;
GAATTGTGAGCGGATAACAATTT                                        C   ? 
3 polydeoxyribonucleotide no no 
;(DA)(DA)(DA)(DT)(DT)(DG)(DT)(DT)(DA)(DT)(DC)(DC)(DG)(DC)(DT)(DC)(DA)(DC)(DA)(DA)
(DT)(DT)(DC)
;
AAATTGTTATCCGCTCACAATTC                                        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  DG  n 
2 2  DA  n 
2 3  DA  n 
2 4  DT  n 
2 5  DT  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 DG  n 
2 14 DA  n 
2 15 DT  n 
2 16 DA  n 
2 17 DA  n 
2 18 DC  n 
2 19 DA  n 
2 20 DA  n 
2 21 DT  n 
2 22 DT  n 
2 23 DT  n 
3 1  DA  n 
3 2  DA  n 
3 3  DA  n 
3 4  DT  n 
3 5  DT  n 
3 6  DG  n 
3 7  DT  n 
3 8  DT  n 
3 9  DA  n 
3 10 DT  n 
3 11 DC  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 DA  n 
3 20 DA  n 
3 21 DT  n 
3 22 DT  n 
3 23 DC  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 2KEI       2KEI   2 GAATTGTGAGCGGATAACAATTT                                        1 ? 
3 PDB 2KEI       2KEI   3 AAATTGTTATCCGCTCACAATTC                                        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 2KEI A 1 ? 62 ? P03023 1  ? 62 ? 1  62 
2 1 2KEI B 1 ? 62 ? P03023 1  ? 62 ? 1  62 
3 2 2KEI C 1 ? 23 ? 2KEI   -1 ? 22 ? -1 22 
4 3 2KEI D 1 ? 23 ? 2KEI   -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 2KEI CYS A 52 ? UNP P03023 VAL 52 'engineered mutation' 52 1 
2 2KEI 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         
;2 mM DNA (5'-D(*DGP*DAP*DAP*DTP*DTP*DGP*DTP*DGP*DAP*DGP*DCP*DGP*DGP*DAP*DTP*DAP*DAP*DCP*DAP*DAP*DTP*DTP*DT)-3'), 
2 mM DNA (5'-D(P*DAP*DAP*DAP*DTP*DTP*DGP*DTP*DTP*DAP*DTP*DCP*DCP*DGP*DCP*DTP*DCP*DAP*DCP*DAP*DAP*DTP*DTP*DC)-3'), 
2 mM Lac headpiece dimer, 10% D2O, 10 mM potassium phosphate, 20 mM potassium chloride, 90% H2O/10% D2O
;
_pdbx_nmr_sample_details.solution_id      1 
_pdbx_nmr_sample_details.solvent_system   '90% H2O/10% 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 DRX 1 'Bruker DRX' 
600 Bruker DRX 2 'Bruker DRX' 
# 
_pdbx_nmr_refine.entry_id           2KEI 
_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             20 
_pdbx_nmr_ensemble.distance_constraint_violation_method          ? 
_pdbx_nmr_ensemble.entry_id                                      2KEI 
_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             2KEI 
_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                   2KEI 
_exptl.method                     'SOLUTION NMR' 
_exptl.method_details             ? 
# 
_struct.entry_id                  2KEI 
_struct.title                     
'Refined Solution Structure of a Dimer of LAC repressor DNA-Binding domain complexed to its natural operator O1' 
_struct.pdbx_model_details        ? 
_struct.pdbx_CASP_flag            ? 
_struct.pdbx_model_type_details   ? 
# 
_struct_keywords.entry_id        2KEI 
_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 SER A 31 ? ASN A 46 ? SER A 31 ASN A 46 1 ? 16 
HELX_P HELX_P4 4 ASN A 50 ? GLY A 58 ? ASN A 50 GLY A 58 1 ? 9  
HELX_P HELX_P5 5 THR B 5  ? GLY B 14 ? THR B 5  GLY B 14 1 ? 10 
HELX_P HELX_P6 6 SER B 16 ? ASN B 25 ? SER B 16 ASN B 25 1 ? 10 
HELX_P HELX_P7 7 SER B 31 ? LEU B 45 ? SER B 31 LEU B 45 1 ? 15 
HELX_P HELX_P8 8 ASN B 50 ? ALA B 57 ? ASN B 50 ALA B 57 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 ? ? ? ? ? ? ?            2.032 ? ? 
hydrog1  hydrog ? ? C DG  1  N1 ? ? ? 1_555 D DC  23 N3 ? ? C DG  -1 D DC  22 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog2  hydrog ? ? C DG  1  N2 ? ? ? 1_555 D DC  23 O2 ? ? C DG  -1 D DC  22 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog3  hydrog ? ? C DG  1  O6 ? ? ? 1_555 D DC  23 N4 ? ? C DG  -1 D DC  22 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog4  hydrog ? ? C DA  2  N1 ? ? ? 1_555 D DT  22 N3 ? ? C DA  1  D DT  21 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog5  hydrog ? ? C DA  2  N6 ? ? ? 1_555 D DT  22 O4 ? ? C DA  1  D DT  21 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog6  hydrog ? ? C DA  3  N1 ? ? ? 1_555 D DT  21 N3 ? ? C DA  2  D DT  20 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog7  hydrog ? ? C DA  3  N6 ? ? ? 1_555 D DT  21 O4 ? ? C DA  2  D DT  20 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog8  hydrog ? ? C DT  4  N3 ? ? ? 1_555 D DA  20 N1 ? ? C DT  3  D DA  19 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog9  hydrog ? ? C DT  4  O4 ? ? ? 1_555 D DA  20 N6 ? ? C DT  3  D DA  19 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog10 hydrog ? ? C DT  5  N3 ? ? ? 1_555 D DA  19 N1 ? ? C DT  4  D DA  18 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog11 hydrog ? ? C DT  5  O4 ? ? ? 1_555 D DA  19 N6 ? ? C DT  4  D DA  18 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog12 hydrog ? ? C DG  6  N1 ? ? ? 1_555 D DC  18 N3 ? ? C DG  5  D DC  17 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog13 hydrog ? ? C DG  6  N2 ? ? ? 1_555 D DC  18 O2 ? ? C DG  5  D DC  17 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog14 hydrog ? ? C DG  6  O6 ? ? ? 1_555 D DC  18 N4 ? ? C DG  5  D DC  17 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog15 hydrog ? ? C DT  7  N3 ? ? ? 1_555 D DA  17 N1 ? ? C DT  6  D DA  16 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog16 hydrog ? ? C DT  7  O4 ? ? ? 1_555 D DA  17 N6 ? ? C DT  6  D DA  16 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog17 hydrog ? ? C DG  8  N1 ? ? ? 1_555 D DC  16 N3 ? ? C DG  7  D DC  15 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog18 hydrog ? ? C DG  8  N2 ? ? ? 1_555 D DC  16 O2 ? ? C DG  7  D DC  15 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog19 hydrog ? ? C DG  8  O6 ? ? ? 1_555 D DC  16 N4 ? ? C DG  7  D DC  15 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog20 hydrog ? ? C DA  9  N1 ? ? ? 1_555 D DT  15 N3 ? ? C DA  8  D DT  14 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog21 hydrog ? ? C DA  9  N6 ? ? ? 1_555 D DT  15 O4 ? ? C DA  8  D DT  14 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog22 hydrog ? ? C DG  10 N1 ? ? ? 1_555 D DC  14 N3 ? ? C DG  9  D DC  13 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog23 hydrog ? ? C DG  10 N2 ? ? ? 1_555 D DC  14 O2 ? ? C DG  9  D DC  13 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog24 hydrog ? ? C DG  10 O6 ? ? ? 1_555 D DC  14 N4 ? ? C DG  9  D DC  13 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog25 hydrog ? ? C DC  11 N3 ? ? ? 1_555 D DG  13 N1 ? ? C DC  10 D DG  12 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog26 hydrog ? ? C DC  11 N4 ? ? ? 1_555 D DG  13 O6 ? ? C DC  10 D DG  12 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog27 hydrog ? ? C DC  11 O2 ? ? ? 1_555 D DG  13 N2 ? ? C DC  10 D DG  12 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog28 hydrog ? ? C DG  12 N1 ? ? ? 1_555 D DC  12 N3 ? ? C DG  11 D DC  11 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog29 hydrog ? ? C DG  12 N2 ? ? ? 1_555 D DC  12 O2 ? ? C DG  11 D DC  11 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog30 hydrog ? ? C DG  12 O6 ? ? ? 1_555 D DC  12 N4 ? ? C DG  11 D DC  11 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog31 hydrog ? ? C DG  13 N1 ? ? ? 1_555 D DC  11 N3 ? ? C DG  12 D DC  10 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog32 hydrog ? ? C DG  13 N2 ? ? ? 1_555 D DC  11 O2 ? ? C DG  12 D DC  10 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog33 hydrog ? ? C DG  13 O6 ? ? ? 1_555 D DC  11 N4 ? ? C DG  12 D DC  10 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog34 hydrog ? ? C DA  14 N1 ? ? ? 1_555 D DT  10 N3 ? ? C DA  13 D DT  9  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog35 hydrog ? ? C DA  14 N6 ? ? ? 1_555 D DT  10 O4 ? ? C DA  13 D DT  9  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog36 hydrog ? ? C DT  15 N3 ? ? ? 1_555 D DA  9  N1 ? ? C DT  14 D DA  8  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog37 hydrog ? ? C DT  15 O4 ? ? ? 1_555 D DA  9  N6 ? ? C DT  14 D DA  8  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog38 hydrog ? ? C DA  16 N1 ? ? ? 1_555 D DT  8  N3 ? ? C DA  15 D DT  7  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog39 hydrog ? ? C DA  16 N6 ? ? ? 1_555 D DT  8  O4 ? ? C DA  15 D DT  7  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog40 hydrog ? ? C DA  17 N1 ? ? ? 1_555 D DT  7  N3 ? ? C DA  16 D DT  6  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog41 hydrog ? ? C DA  17 N6 ? ? ? 1_555 D DT  7  O4 ? ? C DA  16 D DT  6  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog42 hydrog ? ? C DC  18 N3 ? ? ? 1_555 D DG  6  N1 ? ? C DC  17 D DG  5  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog43 hydrog ? ? C DC  18 N4 ? ? ? 1_555 D DG  6  O6 ? ? C DC  17 D DG  5  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog44 hydrog ? ? C DC  18 O2 ? ? ? 1_555 D DG  6  N2 ? ? C DC  17 D DG  5  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog45 hydrog ? ? C DA  19 N1 ? ? ? 1_555 D DT  5  N3 ? ? C DA  18 D DT  4  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog46 hydrog ? ? C DA  19 N6 ? ? ? 1_555 D DT  5  O4 ? ? C DA  18 D DT  4  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog47 hydrog ? ? C DA  20 N1 ? ? ? 1_555 D DT  4  N3 ? ? C DA  19 D DT  3  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog48 hydrog ? ? C DA  20 N6 ? ? ? 1_555 D DT  4  O4 ? ? C DA  19 D DT  3  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog49 hydrog ? ? C DT  21 N3 ? ? ? 1_555 D DA  3  N1 ? ? C DT  20 D DA  2  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog50 hydrog ? ? C DT  21 O4 ? ? ? 1_555 D DA  3  N6 ? ? C DT  20 D DA  2  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog51 hydrog ? ? C DT  22 N3 ? ? ? 1_555 D DA  2  N1 ? ? C DT  21 D DA  1  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog52 hydrog ? ? C DT  22 O4 ? ? ? 1_555 D DA  2  N6 ? ? C DT  21 D DA  1  1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog53 hydrog ? ? C DT  23 N3 ? ? ? 1_555 D DA  1  N1 ? ? C DT  22 D DA  -1 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
hydrog54 hydrog ? ? C DT  23 O4 ? ? ? 1_555 D DA  1  N6 ? ? C DT  22 D DA  -1 1_555 ? ? ? ? ? ? WATSON-CRICK ?     ? ? 
# 
loop_
_struct_conn_type.id 
_struct_conn_type.criteria 
_struct_conn_type.reference 
disulf ? ? 
hydrog ? ? 
# 
_atom_sites.entry_id                    2KEI 
_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  DG  1  -1 -1 DG  DG  C . n 
C 2 2  DA  2  1  1  DA  DA  C . n 
C 2 3  DA  3  2  2  DA  DA  C . n 
C 2 4  DT  4  3  3  DT  DT  C . n 
C 2 5  DT  5  4  4  DT  DT  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 DG  13 12 12 DG  DG  C . n 
C 2 14 DA  14 13 13 DA  DA  C . n 
C 2 15 DT  15 14 14 DT  DT  C . n 
C 2 16 DA  16 15 15 DA  DA  C . n 
C 2 17 DA  17 16 16 DA  DA  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 DT  23 22 22 DT  DT  C . n 
D 3 1  DA  1  -1 -1 DA  DA  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  DT  7  6  6  DT  DT  D . n 
D 3 8  DT  8  7  7  DT  DT  D . n 
D 3 9  DA  9  8  8  DA  DA  D . n 
D 3 10 DT  10 9  9  DT  DT  D . n 
D 3 11 DC  11 10 10 DC  DC  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 DA  19 18 18 DA  DA  D . n 
D 3 20 DA  20 19 19 DA  DA  D . n 
D 3 21 DT  21 20 20 DT  DT  D . n 
D 3 22 DT  22 21 21 DT  DT  D . n 
D 3 23 DC  23 22 22 DC  DC  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_struct_assembly  
4 3 'Structure model' pdbx_struct_oper_list 
5 3 'Structure model' struct_ref_seq        
6 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' '_struct_ref_seq.db_align_beg'        
5 3 'Structure model' '_struct_ref_seq.db_align_end'        
6 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'-D(*DGP*DAP*DAP*DTP*DTP*DGP*DTP*DGP*DAP*DGP*DCP*DGP*DGP*DAP*DTP*DAP*DAP*DCP*DAP*DAP*DTP*DTP*DT)-3')
;
2  ? mM ? 1 
;DNA (5'-D(P*DAP*DAP*DAP*DTP*DTP*DGP*DTP*DTP*DAP*DTP*DCP*DCP*DGP*DCP*DTP*DCP*DAP*DCP*DAP*DAP*DTP*DTP*DC)-3')
;
2  ? mM ? 1 
'Lac headpiece dimer'                                                                                         2  ? mM ? 1 
D2O-                                                                                                          10 ? %  ? 1 
'potassium phosphate'                                                                                         10 ? mM ? 1 
'potassium chloride'                                                                                          20 ? mM ? 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  H22  C DG  9  ? ? O2  D DC  13 ? ? 1.55 
2  1  O2   C DC  17 ? ? H22 D DG  5  ? ? 1.59 
3  2  O2   C DC  17 ? ? H22 D DG  5  ? ? 1.51 
4  2  H22  C DG  11 ? ? O2  D DC  11 ? ? 1.54 
5  2  H22  C DG  9  ? ? O2  D DC  13 ? ? 1.55 
6  3  H22  C DG  9  ? ? O2  D DC  13 ? ? 1.47 
7  3  O2   C DC  17 ? ? H22 D DG  5  ? ? 1.53 
8  3  H62  C DA  13 ? ? O4  D DT  9  ? ? 1.55 
9  3  O4   C DT  14 ? ? H62 D DA  8  ? ? 1.60 
10 4  H22  C DG  9  ? ? O2  D DC  13 ? ? 1.49 
11 4  O2   C DC  17 ? ? H22 D DG  5  ? ? 1.53 
12 4  H22  C DG  12 ? ? O2  D DC  10 ? ? 1.58 
13 5  H22  C DG  11 ? ? O2  D DC  11 ? ? 1.53 
14 5  H22  C DG  9  ? ? O2  D DC  13 ? ? 1.57 
15 5  HZ2  A LYS 59 ? ? OXT A LEU 62 ? ? 1.59 
16 6  H22  C DG  9  ? ? O2  D DC  13 ? ? 1.57 
17 6  H22  C DG  -1 ? ? O2  D DC  22 ? ? 1.59 
18 7  H22  C DG  9  ? ? O2  D DC  13 ? ? 1.53 
19 7  H1   A MET 1  ? ? O   B LEU 62 ? ? 1.57 
20 7  HG1  A THR 5  ? ? OD1 A ASP 8  ? ? 1.58 
21 7  HH12 B ARG 35 ? ? OE1 B GLU 39 ? ? 1.58 
22 8  H22  C DG  9  ? ? O2  D DC  13 ? ? 1.47 
23 8  O2   C DC  17 ? ? H22 D DG  5  ? ? 1.55 
24 9  O2   C DC  17 ? ? H22 D DG  5  ? ? 1.53 
25 9  H22  C DG  9  ? ? O2  D DC  13 ? ? 1.55 
26 9  O4   C DT  6  ? ? H62 D DA  16 ? ? 1.56 
27 9  H62  C DA  19 ? ? O4  D DT  3  ? ? 1.58 
28 10 H22  C DG  -1 ? ? O2  D DC  22 ? ? 1.49 
29 10 O2   C DC  17 ? ? H22 D DG  5  ? ? 1.54 
30 10 H22  C DG  9  ? ? O2  D DC  13 ? ? 1.55 
31 11 H22  C DG  12 ? ? O2  D DC  10 ? ? 1.54 
32 11 H22  C DG  9  ? ? O2  D DC  13 ? ? 1.55 
33 11 H22  C DG  -1 ? ? O2  D DC  22 ? ? 1.57 
34 11 O2   C DC  17 ? ? H22 D DG  5  ? ? 1.58 
35 12 H22  C DG  9  ? ? O2  D DC  13 ? ? 1.53 
36 12 O2   C DC  17 ? ? H22 D DG  5  ? ? 1.55 
37 13 H22  C DG  9  ? ? O2  D DC  13 ? ? 1.46 
38 14 H22  C DG  9  ? ? O2  D DC  13 ? ? 1.52 
39 14 O2   C DC  17 ? ? H22 D DG  5  ? ? 1.54 
40 15 H22  C DG  9  ? ? O2  D DC  13 ? ? 1.54 
41 15 H22  C DG  11 ? ? O2  D DC  11 ? ? 1.54 
42 15 HZ3  B LYS 59 ? ? O   B LEU 62 ? ? 1.59 
43 16 H22  C DG  9  ? ? O2  D DC  13 ? ? 1.49 
44 16 H22  C DG  12 ? ? O2  D DC  10 ? ? 1.55 
45 16 O2   C DC  17 ? ? H22 D DG  5  ? ? 1.55 
46 16 H22  C DG  11 ? ? O2  D DC  11 ? ? 1.56 
47 17 H22  C DG  9  ? ? O2  D DC  13 ? ? 1.56 
48 17 H22  C DG  11 ? ? O2  D DC  11 ? ? 1.58 
49 18 H22  C DG  9  ? ? O2  D DC  13 ? ? 1.44 
50 18 O2   C DC  17 ? ? H22 D DG  5  ? ? 1.57 
51 18 HE   A ARG 35 ? ? OE2 A GLU 39 ? ? 1.57 
52 19 H22  C DG  12 ? ? O2  D DC  10 ? ? 1.56 
53 20 H22  C DG  9  ? ? O2  D DC  13 ? ? 1.46 
54 20 H22  C DG  11 ? ? O2  D DC  11 ? ? 1.56 
55 20 H62  C DA  13 ? ? O4  D DT  9  ? ? 1.57 
# 
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  ALA A 27 ? ? -109.53 -160.69 
2   1  ASN A 46 ? ? 66.12   61.89   
3   1  HIS B 29 ? ? -85.08  39.27   
4   1  PRO B 49 ? ? -30.52  129.55  
5   1  ASN B 50 ? ? -67.68  86.38   
6   1  SER B 61 ? ? -141.36 -68.28  
7   2  GLN A 26 ? ? -125.79 -104.77 
8   2  ALA A 27 ? ? 151.44  -35.37  
9   2  ASN A 46 ? ? 67.76   64.93   
10  2  SER A 61 ? ? 60.63   79.45   
11  2  PRO B 49 ? ? -30.00  128.86  
12  2  ASN B 50 ? ? -63.65  87.35   
13  2  LYS B 59 ? ? -170.68 149.09  
14  3  GLN A 26 ? ? -149.95 -109.88 
15  3  ALA A 27 ? ? 166.53  -21.85  
16  3  SER A 61 ? ? 68.15   154.32  
17  3  HIS B 29 ? ? 89.37   -1.97   
18  3  SER B 31 ? ? -45.19  166.03  
19  3  ASN B 46 ? ? 53.81   71.04   
20  3  TYR B 47 ? ? -35.98  128.72  
21  3  PRO B 49 ? ? -37.54  125.15  
22  3  ASN B 50 ? ? -66.80  76.49   
23  3  LYS B 59 ? ? 58.70   -163.30 
24  4  GLN A 26 ? ? -135.85 -106.36 
25  4  ALA A 27 ? ? 151.83  -35.32  
26  4  ASN A 46 ? ? 71.72   66.41   
27  4  PRO A 49 ? ? -55.26  107.16  
28  4  LYS A 59 ? ? -67.02  92.03   
29  4  SER A 61 ? ? 57.56   78.81   
30  4  VAL B 15 ? ? -45.52  160.92  
31  4  HIS B 29 ? ? 72.00   40.43   
32  4  PRO B 49 ? ? -34.48  126.60  
33  4  ASN B 50 ? ? -65.89  80.75   
34  4  LYS B 59 ? ? 50.13   -121.33 
35  5  GLN A 26 ? ? -129.12 -101.88 
36  5  ALA A 27 ? ? 145.04  -46.32  
37  5  ASN A 46 ? ? 67.67   70.89   
38  5  SER A 61 ? ? 69.71   -77.65  
39  5  VAL B 15 ? ? -48.66  159.55  
40  5  PRO B 49 ? ? -29.78  125.56  
41  5  ASN B 50 ? ? -52.23  94.81   
42  5  GLN B 60 ? ? -134.24 -91.59  
43  6  GLN A 26 ? ? -125.41 -117.72 
44  6  ALA A 27 ? ? 155.89  -29.64  
45  6  SER A 28 ? ? -42.87  -92.52  
46  6  HIS A 29 ? ? -61.73  42.24   
47  6  ASN A 46 ? ? 69.87   66.40   
48  6  ASN B 25 ? ? -76.12  -82.26  
49  6  SER B 28 ? ? -159.44 -46.11  
50  6  PRO B 49 ? ? -34.03  126.29  
51  6  ASN B 50 ? ? -65.93  81.34   
52  7  VAL A 15 ? ? -124.16 -169.83 
53  7  GLN A 26 ? ? -166.15 -67.08  
54  7  ALA A 27 ? ? 97.86   145.91  
55  7  SER A 28 ? ? -171.64 -89.26  
56  7  HIS A 29 ? ? -66.56  52.48   
57  7  ASN A 46 ? ? 66.11   65.53   
58  7  ASN B 25 ? ? -97.50  -83.43  
59  7  PRO B 49 ? ? -30.05  127.65  
60  7  ASN B 50 ? ? -62.33  87.78   
61  7  SER B 61 ? ? -145.00 -6.85   
62  8  ALA A 27 ? ? -108.04 -161.27 
63  8  GLN A 60 ? ? 76.44   32.02   
64  8  LYS B 2  ? ? -121.04 -58.64  
65  8  HIS B 29 ? ? -83.66  47.04   
66  8  PRO B 49 ? ? -31.49  127.84  
67  9  LYS A 2  ? ? -175.60 -58.59  
68  9  GLN A 26 ? ? -160.42 -59.76  
69  9  ALA A 27 ? ? 86.76   131.64  
70  9  SER A 28 ? ? -168.48 -88.29  
71  9  HIS A 29 ? ? -70.16  49.78   
72  9  ASN A 46 ? ? 67.12   68.89   
73  9  LYS A 59 ? ? -59.35  101.35  
74  9  ASN B 25 ? ? -66.28  -79.47  
75  9  GLN B 26 ? ? -168.81 85.96   
76  9  SER B 28 ? ? -137.33 -71.46  
77  9  HIS B 29 ? ? -81.43  47.32   
78  9  PRO B 49 ? ? -30.73  122.48  
79  9  ASN B 50 ? ? -56.49  91.66   
80  9  LYS B 59 ? ? 54.39   -111.91 
81  10 GLN A 26 ? ? -137.34 -113.39 
82  10 ALA A 27 ? ? 156.73  -32.67  
83  10 ASN A 46 ? ? 68.47   63.54   
84  10 SER A 61 ? ? 60.59   -83.77  
85  10 PRO B 49 ? ? -29.56  124.78  
86  10 ASN B 50 ? ? -59.41  85.01   
87  10 LYS B 59 ? ? 64.67   -83.50  
88  10 GLN B 60 ? ? -146.93 -65.48  
89  10 SER B 61 ? ? -146.62 -42.27  
90  11 LYS A 2  ? ? -125.11 -52.16  
91  11 SER A 28 ? ? -164.51 -95.13  
92  11 HIS A 29 ? ? -65.21  53.89   
93  11 ASN A 46 ? ? 63.12   66.58   
94  11 SER A 61 ? ? -103.39 46.72   
95  11 ASN B 25 ? ? -81.73  -85.02  
96  11 SER B 28 ? ? -153.69 -26.08  
97  11 PRO B 49 ? ? -35.37  123.88  
98  11 ASN B 50 ? ? -65.02  75.88   
99  11 LYS B 59 ? ? 61.95   128.70  
100 12 GLN A 26 ? ? -135.44 -128.88 
101 12 ALA A 27 ? ? 167.06  -39.07  
102 12 GLN A 60 ? ? -153.45 46.19   
103 12 SER A 61 ? ? 63.91   95.47   
104 12 PRO B 49 ? ? -28.96  123.36  
105 12 ASN B 50 ? ? -62.50  77.80   
106 12 LYS B 59 ? ? 72.96   -95.78  
107 13 GLN A 26 ? ? -129.38 -120.48 
108 13 ALA A 27 ? ? 156.95  -33.43  
109 13 LYS A 59 ? ? -178.84 137.16  
110 13 PRO B 49 ? ? -36.45  127.03  
111 13 ASN B 50 ? ? -63.63  85.06   
112 14 GLN A 26 ? ? -130.70 -117.43 
113 14 ALA A 27 ? ? 152.31  -40.71  
114 14 ASN A 46 ? ? 69.99   68.92   
115 14 HIS B 29 ? ? 71.38   34.90   
116 14 PRO B 49 ? ? -32.06  121.34  
117 14 GLN B 60 ? ? -149.24 -57.05  
118 14 SER B 61 ? ? -148.63 -69.35  
119 15 ALA A 27 ? ? -107.19 -151.48 
120 15 ASN A 46 ? ? 67.57   61.65   
121 15 GLN B 26 ? ? 75.00   -53.06  
122 15 ALA B 27 ? ? 64.20   -129.24 
123 15 SER B 28 ? ? -158.32 -42.99  
124 15 PRO B 49 ? ? -34.60  123.59  
125 15 ASN B 50 ? ? -66.03  81.90   
126 15 GLN B 60 ? ? -175.70 -22.80  
127 16 GLN A 26 ? ? -133.45 -109.31 
128 16 ALA A 27 ? ? 158.43  -34.45  
129 16 GLN A 60 ? ? -93.19  -71.35  
130 16 PRO B 49 ? ? -29.76  125.77  
131 16 ASN B 50 ? ? -63.68  78.76   
132 16 LYS B 59 ? ? 171.84  118.66  
133 16 SER B 61 ? ? -100.89 -71.11  
134 17 GLN A 26 ? ? -165.04 74.44   
135 17 SER A 61 ? ? 75.20   -53.58  
136 17 PRO B 49 ? ? -28.97  121.66  
137 17 ASN B 50 ? ? -56.55  87.60   
138 17 LYS B 59 ? ? 60.27   -87.04  
139 18 GLN A 26 ? ? -131.68 -114.15 
140 18 ALA A 27 ? ? 158.25  -32.92  
141 18 PRO B 49 ? ? -34.51  131.33  
142 18 ASN B 50 ? ? -59.97  88.34   
143 19 GLN A 26 ? ? -142.68 -117.55 
144 19 ALA A 27 ? ? 163.27  -37.65  
145 19 ASN A 46 ? ? 66.81   69.26   
146 19 HIS B 29 ? ? 71.92   30.18   
147 19 PRO B 49 ? ? -30.45  127.08  
148 19 ASN B 50 ? ? -66.55  79.05   
149 19 LYS B 59 ? ? 72.60   134.55  
150 19 SER B 61 ? ? -136.26 -40.34  
151 20 GLN A 26 ? ? -139.31 -92.70  
152 20 ALA A 27 ? ? 102.02  120.76  
153 20 SER A 28 ? ? 159.57  -0.59   
154 20 ASN A 46 ? ? 71.28   70.66   
155 20 ASN B 25 ? ? -103.11 -91.01  
156 20 GLN B 26 ? ? -165.94 52.08   
157 20 PRO B 49 ? ? -34.81  127.79  
158 20 ASN B 50 ? ? -63.05  90.54   
159 20 LYS B 59 ? ? -130.12 -48.07  
160 20 GLN B 60 ? ? 69.64   -95.29  
# 
loop_
_ndb_struct_conf_na.entry_id 
_ndb_struct_conf_na.feature 
2KEI 'double helix'        
2KEI 'b-form double helix' 
#