data_1AYG # _entry.id 1AYG # _audit_conform.dict_name mmcif_pdbx.dic _audit_conform.dict_version 5.355 _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 1AYG pdb_00001ayg 10.2210/pdb1ayg/pdb WWPDB D_1000171409 ? ? # _pdbx_database_status.status_code REL _pdbx_database_status.entry_id 1AYG _pdbx_database_status.recvd_initial_deposition_date 1997-11-04 _pdbx_database_status.deposit_site ? _pdbx_database_status.process_site BNL _pdbx_database_status.SG_entry . _pdbx_database_status.pdb_format_compatible Y _pdbx_database_status.status_code_mr ? _pdbx_database_status.status_code_sf ? _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 'Hasegawa, J.' 1 'Yoshida, T.' 2 'Yamazaki, T.' 3 'Sambongi, Y.' 4 'Yu, Y.' 5 'Igarashi, Y.' 6 'Kodama, T.' 7 'Yamazaki, K.' 8 'Hakusui, H.' 9 'Kyogoku, Y.' 10 'Kobayashi, Y.' 11 # _citation.id primary _citation.title 'Solution structure of thermostable cytochrome c-552 from Hydrogenobacter thermophilus determined by 1H-NMR spectroscopy.' _citation.journal_abbrev Biochemistry _citation.journal_volume 37 _citation.page_first 9641 _citation.page_last 9649 _citation.year 1998 _citation.journal_id_ASTM BICHAW _citation.country US _citation.journal_id_ISSN 0006-2960 _citation.journal_id_CSD 0033 _citation.book_publisher ? _citation.pdbx_database_id_PubMed 9657676 _citation.pdbx_database_id_DOI 10.1021/bi9803067 # loop_ _citation_author.citation_id _citation_author.name _citation_author.ordinal _citation_author.identifier_ORCID primary 'Hasegawa, J.' 1 ? primary 'Yoshida, T.' 2 ? primary 'Yamazaki, T.' 3 ? primary 'Sambongi, Y.' 4 ? primary 'Yu, Y.' 5 ? primary 'Igarashi, Y.' 6 ? primary 'Kodama, T.' 7 ? primary 'Yamazaki, K.' 8 ? primary 'Kyogoku, Y.' 9 ? primary 'Kobayashi, Y.' 10 ? # _cell.entry_id 1AYG _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 1AYG _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 nat 'CYTOCHROME C-552' 8586.015 1 ? ? ? 'C-TYPE CYTOCHROME (REDUCED FORM)' 2 non-polymer syn 'HEME C' 618.503 1 ? ? ? ? # _entity_poly.entity_id 1 _entity_poly.type 'polypeptide(L)' _entity_poly.nstd_linkage no _entity_poly.nstd_monomer no _entity_poly.pdbx_seq_one_letter_code NEQLAKQKGCMACHDLKAKKVGPAYADVAKKYAGRKDAVDYLAGKIKKGGSGVWGSVPMPPQNVTDAEAKQLAQWILSIK _entity_poly.pdbx_seq_one_letter_code_can NEQLAKQKGCMACHDLKAKKVGPAYADVAKKYAGRKDAVDYLAGKIKKGGSGVWGSVPMPPQNVTDAEAKQLAQWILSIK _entity_poly.pdbx_strand_id A _entity_poly.pdbx_target_identifier ? # loop_ _entity_poly_seq.entity_id _entity_poly_seq.num _entity_poly_seq.mon_id _entity_poly_seq.hetero 1 1 ASN n 1 2 GLU n 1 3 GLN n 1 4 LEU n 1 5 ALA n 1 6 LYS n 1 7 GLN n 1 8 LYS n 1 9 GLY n 1 10 CYS n 1 11 MET n 1 12 ALA n 1 13 CYS n 1 14 HIS n 1 15 ASP n 1 16 LEU n 1 17 LYS n 1 18 ALA n 1 19 LYS n 1 20 LYS n 1 21 VAL n 1 22 GLY n 1 23 PRO n 1 24 ALA n 1 25 TYR n 1 26 ALA n 1 27 ASP n 1 28 VAL n 1 29 ALA n 1 30 LYS n 1 31 LYS n 1 32 TYR n 1 33 ALA n 1 34 GLY n 1 35 ARG n 1 36 LYS n 1 37 ASP n 1 38 ALA n 1 39 VAL n 1 40 ASP n 1 41 TYR n 1 42 LEU n 1 43 ALA n 1 44 GLY n 1 45 LYS n 1 46 ILE n 1 47 LYS n 1 48 LYS n 1 49 GLY n 1 50 GLY n 1 51 SER n 1 52 GLY n 1 53 VAL n 1 54 TRP n 1 55 GLY n 1 56 SER n 1 57 VAL n 1 58 PRO n 1 59 MET n 1 60 PRO n 1 61 PRO n 1 62 GLN n 1 63 ASN n 1 64 VAL n 1 65 THR n 1 66 ASP n 1 67 ALA n 1 68 GLU n 1 69 ALA n 1 70 LYS n 1 71 GLN n 1 72 LEU n 1 73 ALA n 1 74 GLN n 1 75 TRP n 1 76 ILE n 1 77 LEU n 1 78 SER n 1 79 ILE n 1 80 LYS n # _entity_src_nat.entity_id 1 _entity_src_nat.pdbx_src_id 1 _entity_src_nat.pdbx_alt_source_flag sample _entity_src_nat.pdbx_beg_seq_num ? _entity_src_nat.pdbx_end_seq_num ? _entity_src_nat.common_name ? _entity_src_nat.pdbx_organism_scientific 'Hydrogenobacter thermophilus' _entity_src_nat.pdbx_ncbi_taxonomy_id 940 _entity_src_nat.genus Hydrogenobacter _entity_src_nat.species ? _entity_src_nat.strain TK-6 _entity_src_nat.tissue ? _entity_src_nat.tissue_fraction ? _entity_src_nat.pdbx_secretion ? _entity_src_nat.pdbx_fragment ? _entity_src_nat.pdbx_variant ? _entity_src_nat.pdbx_cell_line ? _entity_src_nat.pdbx_atcc ? _entity_src_nat.pdbx_cellular_location PERIPLASM _entity_src_nat.pdbx_organ ? _entity_src_nat.pdbx_organelle ? _entity_src_nat.pdbx_cell ? _entity_src_nat.pdbx_plasmid_name ? _entity_src_nat.pdbx_plasmid_details ? _entity_src_nat.details ? # _struct_ref.id 1 _struct_ref.db_name UNP _struct_ref.db_code CY552_HYDTH _struct_ref.entity_id 1 _struct_ref.pdbx_db_accession P15452 _struct_ref.pdbx_align_begin 1 _struct_ref.pdbx_seq_one_letter_code ;MKKFLLVAVVGLAGITFANEQLAKQKGCMACHDLKAKKVGPAYADVAKKYAGRKDAVDYLAGKIKKGGSGVWGSVPMPPQ NVTDAEAKQLAQWILSIK ; _struct_ref.pdbx_db_isoform ? # _struct_ref_seq.align_id 1 _struct_ref_seq.ref_id 1 _struct_ref_seq.pdbx_PDB_id_code 1AYG _struct_ref_seq.pdbx_strand_id A _struct_ref_seq.seq_align_beg 1 _struct_ref_seq.pdbx_seq_align_beg_ins_code ? _struct_ref_seq.seq_align_end 80 _struct_ref_seq.pdbx_seq_align_end_ins_code ? _struct_ref_seq.pdbx_db_accession P15452 _struct_ref_seq.db_align_beg 19 _struct_ref_seq.pdbx_db_align_beg_ins_code ? _struct_ref_seq.db_align_end 98 _struct_ref_seq.pdbx_db_align_end_ins_code ? _struct_ref_seq.pdbx_auth_seq_align_beg 1 _struct_ref_seq.pdbx_auth_seq_align_end 80 # 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 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 HEC non-polymer . 'HEME C' ? 'C34 H34 Fe N4 O4' 618.503 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 TRP 'L-peptide linking' y TRYPTOPHAN ? 'C11 H12 N2 O2' 204.225 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.experiment_id _pdbx_nmr_exptl.conditions_id _pdbx_nmr_exptl.type _pdbx_nmr_exptl.solution_id 1 1 NOESY 1 2 1 DQF-COSY 1 3 1 TOCSY 1 4 1 E.COSY 1 # _pdbx_nmr_exptl_sample_conditions.conditions_id 1 _pdbx_nmr_exptl_sample_conditions.temperature 298 _pdbx_nmr_exptl_sample_conditions.pressure 1 _pdbx_nmr_exptl_sample_conditions.pH 4.8 _pdbx_nmr_exptl_sample_conditions.ionic_strength '120mM ACETATE' _pdbx_nmr_exptl_sample_conditions.pressure_units atm _pdbx_nmr_exptl_sample_conditions.temperature_units K # _pdbx_nmr_sample_details.solution_id 1 _pdbx_nmr_sample_details.contents '90% H2O/10% D2O, OR 99.98% D2O CONTAINING 120MM DEUTERATED ACETATE BUFFER' # loop_ _pdbx_nmr_spectrometer.spectrometer_id _pdbx_nmr_spectrometer.model _pdbx_nmr_spectrometer.manufacturer _pdbx_nmr_spectrometer.field_strength 1 ARX500 Bruker 500 2 'AMX500 & DMX750' Bruker 750 # _pdbx_nmr_refine.entry_id 1AYG _pdbx_nmr_refine.method 'simulated annealing' _pdbx_nmr_refine.details 'SIMULATED ANNEALING REFINEMENT FOR NMR STRUCTURE DETERMINATION.' _pdbx_nmr_refine.software_ordinal 1 # _pdbx_nmr_details.entry_id 1AYG _pdbx_nmr_details.text 'THE STRUCTURE WAS DETERMINED USING 1H-NMR SPECTROSCOPY ON CYTOCHROME C-552' # _pdbx_nmr_ensemble.entry_id 1AYG _pdbx_nmr_ensemble.conformers_calculated_total_number 100 _pdbx_nmr_ensemble.conformers_submitted_total_number 20 _pdbx_nmr_ensemble.conformer_selection_criteria 'LOWER ENERGY' # loop_ _pdbx_nmr_software.classification _pdbx_nmr_software.name _pdbx_nmr_software.version _pdbx_nmr_software.authors _pdbx_nmr_software.ordinal refinement X-PLOR 3.1 BRUNGER 1 'structure solution' X-PLOR ? ? 2 # _exptl.entry_id 1AYG _exptl.method 'SOLUTION NMR' _exptl.crystals_number ? # _struct.entry_id 1AYG _struct.title 'SOLUTION STRUCTURE OF CYTOCHROME C-552, NMR, 20 STRUCTURES' _struct.pdbx_model_details ? _struct.pdbx_CASP_flag ? _struct.pdbx_model_type_details ? # _struct_keywords.entry_id 1AYG _struct_keywords.pdbx_keywords 'ELECTRON TRANSPORT' _struct_keywords.text 'CYTOCHROME C, ELECTRON TRANSPORT, PORPHYRIN, FERROUS IRON' # loop_ _struct_asym.id _struct_asym.pdbx_blank_PDB_chainid_flag _struct_asym.pdbx_modified _struct_asym.entity_id _struct_asym.details A Y N 1 ? B N N 2 ? # _struct_biol.id 1 # 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 GLN A 3 ? GLN A 7 ? GLN A 3 GLN A 7 1 ? 5 HELX_P HELX_P2 2 TYR A 25 ? TYR A 32 ? TYR A 25 TYR A 32 1 ? 8 HELX_P HELX_P3 3 ALA A 38 ? LYS A 47 ? ALA A 38 LYS A 47 1 ? 10 HELX_P HELX_P4 4 ALA A 67 ? SER A 78 ? ALA A 67 SER A 78 1 ? 12 # _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 covale1 covale none ? A CYS 10 SG ? ? ? 1_555 B HEC . CAB ? ? A CYS 10 A HEC 81 1_555 ? ? ? ? ? ? ? 1.812 ? ? covale2 covale none ? A CYS 13 SG ? ? ? 1_555 B HEC . CAC ? ? A CYS 13 A HEC 81 1_555 ? ? ? ? ? ? ? 1.813 ? ? metalc1 metalc ? ? A HIS 14 NE2 ? ? ? 1_555 B HEC . FE ? ? A HIS 14 A HEC 81 1_555 ? ? ? ? ? ? ? 2.984 ? ? # loop_ _struct_conn_type.id _struct_conn_type.criteria _struct_conn_type.reference covale ? ? metalc ? ? # _struct_site.id AC1 _struct_site.pdbx_evidence_code Software _struct_site.pdbx_auth_asym_id A _struct_site.pdbx_auth_comp_id HEC _struct_site.pdbx_auth_seq_id 81 _struct_site.pdbx_auth_ins_code ? _struct_site.pdbx_num_residues 14 _struct_site.details 'BINDING SITE FOR RESIDUE HEC A 81' # loop_ _struct_site_gen.id _struct_site_gen.site_id _struct_site_gen.pdbx_num_res _struct_site_gen.label_comp_id _struct_site_gen.label_asym_id _struct_site_gen.label_seq_id _struct_site_gen.pdbx_auth_ins_code _struct_site_gen.auth_comp_id _struct_site_gen.auth_asym_id _struct_site_gen.auth_seq_id _struct_site_gen.label_atom_id _struct_site_gen.label_alt_id _struct_site_gen.symmetry _struct_site_gen.details 1 AC1 14 GLY A 9 ? GLY A 9 . ? 1_555 ? 2 AC1 14 CYS A 10 ? CYS A 10 . ? 1_555 ? 3 AC1 14 CYS A 13 ? CYS A 13 . ? 1_555 ? 4 AC1 14 HIS A 14 ? HIS A 14 . ? 1_555 ? 5 AC1 14 PRO A 23 ? PRO A 23 . ? 1_555 ? 6 AC1 14 TYR A 32 ? TYR A 32 . ? 1_555 ? 7 AC1 14 ILE A 46 ? ILE A 46 . ? 1_555 ? 8 AC1 14 GLY A 52 ? GLY A 52 . ? 1_555 ? 9 AC1 14 TRP A 54 ? TRP A 54 . ? 1_555 ? 10 AC1 14 GLY A 55 ? GLY A 55 . ? 1_555 ? 11 AC1 14 VAL A 57 ? VAL A 57 . ? 1_555 ? 12 AC1 14 MET A 59 ? MET A 59 . ? 1_555 ? 13 AC1 14 GLN A 62 ? GLN A 62 . ? 1_555 ? 14 AC1 14 LEU A 72 ? LEU A 72 . ? 1_555 ? # _database_PDB_matrix.entry_id 1AYG _database_PDB_matrix.origx[1][1] 1.000000 _database_PDB_matrix.origx[1][2] 0.000000 _database_PDB_matrix.origx[1][3] 0.000000 _database_PDB_matrix.origx[2][1] 0.000000 _database_PDB_matrix.origx[2][2] 1.000000 _database_PDB_matrix.origx[2][3] 0.000000 _database_PDB_matrix.origx[3][1] 0.000000 _database_PDB_matrix.origx[3][2] 0.000000 _database_PDB_matrix.origx[3][3] 1.000000 _database_PDB_matrix.origx_vector[1] 0.00000 _database_PDB_matrix.origx_vector[2] 0.00000 _database_PDB_matrix.origx_vector[3] 0.00000 # _atom_sites.entry_id 1AYG _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 FE H N O 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 ASN 1 1 1 ASN ASN A . n A 1 2 GLU 2 2 2 GLU GLU A . n A 1 3 GLN 3 3 3 GLN GLN A . n A 1 4 LEU 4 4 4 LEU LEU A . n A 1 5 ALA 5 5 5 ALA ALA A . n A 1 6 LYS 6 6 6 LYS LYS A . n A 1 7 GLN 7 7 7 GLN GLN A . n A 1 8 LYS 8 8 8 LYS LYS A . n A 1 9 GLY 9 9 9 GLY GLY A . n A 1 10 CYS 10 10 10 CYS CYS A . n A 1 11 MET 11 11 11 MET MET A . n A 1 12 ALA 12 12 12 ALA ALA A . n A 1 13 CYS 13 13 13 CYS CYS A . n A 1 14 HIS 14 14 14 HIS HIS A . n A 1 15 ASP 15 15 15 ASP ASP A . n A 1 16 LEU 16 16 16 LEU LEU A . n A 1 17 LYS 17 17 17 LYS LYS A . n A 1 18 ALA 18 18 18 ALA ALA A . n A 1 19 LYS 19 19 19 LYS LYS A . n A 1 20 LYS 20 20 20 LYS LYS A . n A 1 21 VAL 21 21 21 VAL VAL A . n A 1 22 GLY 22 22 22 GLY GLY A . n A 1 23 PRO 23 23 23 PRO PRO A . n A 1 24 ALA 24 24 24 ALA ALA A . n A 1 25 TYR 25 25 25 TYR TYR A . n A 1 26 ALA 26 26 26 ALA ALA A . n A 1 27 ASP 27 27 27 ASP ASP A . n A 1 28 VAL 28 28 28 VAL VAL A . n A 1 29 ALA 29 29 29 ALA ALA A . n A 1 30 LYS 30 30 30 LYS LYS A . n A 1 31 LYS 31 31 31 LYS LYS A . n A 1 32 TYR 32 32 32 TYR TYR A . n A 1 33 ALA 33 33 33 ALA ALA A . n A 1 34 GLY 34 34 34 GLY GLY A . n A 1 35 ARG 35 35 35 ARG ARG A . n A 1 36 LYS 36 36 36 LYS LYS A . n A 1 37 ASP 37 37 37 ASP ASP A . n A 1 38 ALA 38 38 38 ALA ALA A . n A 1 39 VAL 39 39 39 VAL VAL A . n A 1 40 ASP 40 40 40 ASP ASP A . n A 1 41 TYR 41 41 41 TYR TYR A . n A 1 42 LEU 42 42 42 LEU LEU A . n A 1 43 ALA 43 43 43 ALA ALA A . n A 1 44 GLY 44 44 44 GLY GLY A . n A 1 45 LYS 45 45 45 LYS LYS A . n A 1 46 ILE 46 46 46 ILE ILE A . n A 1 47 LYS 47 47 47 LYS LYS A . n A 1 48 LYS 48 48 48 LYS LYS A . n A 1 49 GLY 49 49 49 GLY GLY A . n A 1 50 GLY 50 50 50 GLY GLY A . n A 1 51 SER 51 51 51 SER SER A . n A 1 52 GLY 52 52 52 GLY GLY A . n A 1 53 VAL 53 53 53 VAL VAL A . n A 1 54 TRP 54 54 54 TRP TRP A . n A 1 55 GLY 55 55 55 GLY GLY A . n A 1 56 SER 56 56 56 SER SER A . n A 1 57 VAL 57 57 57 VAL VAL A . n A 1 58 PRO 58 58 58 PRO PRO A . n A 1 59 MET 59 59 59 MET MET A . n A 1 60 PRO 60 60 60 PRO PRO A . n A 1 61 PRO 61 61 61 PRO PRO A . n A 1 62 GLN 62 62 62 GLN GLN A . n A 1 63 ASN 63 63 63 ASN ASN A . n A 1 64 VAL 64 64 64 VAL VAL A . n A 1 65 THR 65 65 65 THR THR A . n A 1 66 ASP 66 66 66 ASP ASP A . n A 1 67 ALA 67 67 67 ALA ALA A . n A 1 68 GLU 68 68 68 GLU GLU A . n A 1 69 ALA 69 69 69 ALA ALA A . n A 1 70 LYS 70 70 70 LYS LYS A . n A 1 71 GLN 71 71 71 GLN GLN A . n A 1 72 LEU 72 72 72 LEU LEU A . n A 1 73 ALA 73 73 73 ALA ALA A . n A 1 74 GLN 74 74 74 GLN GLN A . n A 1 75 TRP 75 75 75 TRP TRP A . n A 1 76 ILE 76 76 76 ILE ILE A . n A 1 77 LEU 77 77 77 LEU LEU A . n A 1 78 SER 78 78 78 SER SER A . n A 1 79 ILE 79 79 79 ILE ILE A . n A 1 80 LYS 80 80 80 LYS LYS A . n # _pdbx_nonpoly_scheme.asym_id B _pdbx_nonpoly_scheme.entity_id 2 _pdbx_nonpoly_scheme.mon_id HEC _pdbx_nonpoly_scheme.ndb_seq_num 1 _pdbx_nonpoly_scheme.pdb_seq_num 81 _pdbx_nonpoly_scheme.auth_seq_num 81 _pdbx_nonpoly_scheme.pdb_mon_id HEC _pdbx_nonpoly_scheme.auth_mon_id HEC _pdbx_nonpoly_scheme.pdb_strand_id A _pdbx_nonpoly_scheme.pdb_ins_code . # _pdbx_struct_assembly.id 1 _pdbx_struct_assembly.details author_defined_assembly _pdbx_struct_assembly.method_details ? _pdbx_struct_assembly.oligomeric_details monomeric _pdbx_struct_assembly.oligomeric_count 1 # _pdbx_struct_assembly_gen.assembly_id 1 _pdbx_struct_assembly_gen.oper_expression 1 _pdbx_struct_assembly_gen.asym_id_list A,B # _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 x,y,z _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_struct_conn_angle.id _pdbx_struct_conn_angle.ptnr1_label_atom_id _pdbx_struct_conn_angle.ptnr1_label_alt_id _pdbx_struct_conn_angle.ptnr1_label_asym_id _pdbx_struct_conn_angle.ptnr1_label_comp_id _pdbx_struct_conn_angle.ptnr1_label_seq_id _pdbx_struct_conn_angle.ptnr1_auth_atom_id _pdbx_struct_conn_angle.ptnr1_auth_asym_id _pdbx_struct_conn_angle.ptnr1_auth_comp_id _pdbx_struct_conn_angle.ptnr1_auth_seq_id _pdbx_struct_conn_angle.ptnr1_PDB_ins_code _pdbx_struct_conn_angle.ptnr1_symmetry _pdbx_struct_conn_angle.ptnr2_label_atom_id _pdbx_struct_conn_angle.ptnr2_label_alt_id _pdbx_struct_conn_angle.ptnr2_label_asym_id _pdbx_struct_conn_angle.ptnr2_label_comp_id _pdbx_struct_conn_angle.ptnr2_label_seq_id _pdbx_struct_conn_angle.ptnr2_auth_atom_id _pdbx_struct_conn_angle.ptnr2_auth_asym_id _pdbx_struct_conn_angle.ptnr2_auth_comp_id _pdbx_struct_conn_angle.ptnr2_auth_seq_id _pdbx_struct_conn_angle.ptnr2_PDB_ins_code _pdbx_struct_conn_angle.ptnr2_symmetry _pdbx_struct_conn_angle.ptnr3_label_atom_id _pdbx_struct_conn_angle.ptnr3_label_alt_id _pdbx_struct_conn_angle.ptnr3_label_asym_id _pdbx_struct_conn_angle.ptnr3_label_comp_id _pdbx_struct_conn_angle.ptnr3_label_seq_id _pdbx_struct_conn_angle.ptnr3_auth_atom_id _pdbx_struct_conn_angle.ptnr3_auth_asym_id _pdbx_struct_conn_angle.ptnr3_auth_comp_id _pdbx_struct_conn_angle.ptnr3_auth_seq_id _pdbx_struct_conn_angle.ptnr3_PDB_ins_code _pdbx_struct_conn_angle.ptnr3_symmetry _pdbx_struct_conn_angle.value _pdbx_struct_conn_angle.value_esd 1 NE2 ? A HIS 14 ? A HIS 14 ? 1_555 FE ? B HEC . ? A HEC 81 ? 1_555 NA ? B HEC . ? A HEC 81 ? 1_555 72.8 ? 2 NE2 ? A HIS 14 ? A HIS 14 ? 1_555 FE ? B HEC . ? A HEC 81 ? 1_555 NB ? B HEC . ? A HEC 81 ? 1_555 105.3 ? 3 NA ? B HEC . ? A HEC 81 ? 1_555 FE ? B HEC . ? A HEC 81 ? 1_555 NB ? B HEC . ? A HEC 81 ? 1_555 90.0 ? 4 NE2 ? A HIS 14 ? A HIS 14 ? 1_555 FE ? B HEC . ? A HEC 81 ? 1_555 NC ? B HEC . ? A HEC 81 ? 1_555 105.8 ? 5 NA ? B HEC . ? A HEC 81 ? 1_555 FE ? B HEC . ? A HEC 81 ? 1_555 NC ? B HEC . ? A HEC 81 ? 1_555 178.5 ? 6 NB ? B HEC . ? A HEC 81 ? 1_555 FE ? B HEC . ? A HEC 81 ? 1_555 NC ? B HEC . ? A HEC 81 ? 1_555 90.0 ? 7 NE2 ? A HIS 14 ? A HIS 14 ? 1_555 FE ? B HEC . ? A HEC 81 ? 1_555 ND ? B HEC . ? A HEC 81 ? 1_555 74.4 ? 8 NA ? B HEC . ? A HEC 81 ? 1_555 FE ? B HEC . ? A HEC 81 ? 1_555 ND ? B HEC . ? A HEC 81 ? 1_555 90.2 ? 9 NB ? B HEC . ? A HEC 81 ? 1_555 FE ? B HEC . ? A HEC 81 ? 1_555 ND ? B HEC . ? A HEC 81 ? 1_555 179.7 ? 10 NC ? B HEC . ? A HEC 81 ? 1_555 FE ? B HEC . ? A HEC 81 ? 1_555 ND ? B HEC . ? A HEC 81 ? 1_555 89.9 ? # 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 1998-11-25 2 'Structure model' 1 1 2008-03-24 3 'Structure model' 1 2 2011-07-13 4 'Structure model' 1 3 2022-02-16 # _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' 'Version format compliance' 3 4 'Structure model' 'Database references' 4 4 'Structure model' 'Derived calculations' 5 4 'Structure model' 'Experimental preparation' 6 4 'Structure model' Other # 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 4 'Structure model' database_2 2 4 'Structure model' pdbx_database_status 3 4 'Structure model' pdbx_nmr_exptl_sample_conditions 4 4 'Structure model' pdbx_struct_assembly 5 4 'Structure model' pdbx_struct_oper_list 6 4 'Structure model' struct_conn 7 4 'Structure model' struct_site # 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 4 'Structure model' '_database_2.pdbx_DOI' 2 4 'Structure model' '_database_2.pdbx_database_accession' 3 4 'Structure model' '_pdbx_database_status.process_site' 4 4 'Structure model' '_pdbx_nmr_exptl_sample_conditions.pressure_units' 5 4 'Structure model' '_struct_conn.pdbx_leaving_atom_flag' 6 4 'Structure model' '_struct_conn.ptnr1_auth_comp_id' 7 4 'Structure model' '_struct_conn.ptnr1_auth_seq_id' 8 4 'Structure model' '_struct_conn.ptnr1_label_asym_id' 9 4 'Structure model' '_struct_conn.ptnr1_label_atom_id' 10 4 'Structure model' '_struct_conn.ptnr1_label_comp_id' 11 4 'Structure model' '_struct_conn.ptnr1_label_seq_id' 12 4 'Structure model' '_struct_conn.ptnr2_auth_comp_id' 13 4 'Structure model' '_struct_conn.ptnr2_auth_seq_id' 14 4 'Structure model' '_struct_conn.ptnr2_label_asym_id' 15 4 'Structure model' '_struct_conn.ptnr2_label_atom_id' 16 4 'Structure model' '_struct_conn.ptnr2_label_comp_id' 17 4 'Structure model' '_struct_conn.ptnr2_label_seq_id' 18 4 'Structure model' '_struct_site.pdbx_auth_asym_id' 19 4 'Structure model' '_struct_site.pdbx_auth_comp_id' 20 4 'Structure model' '_struct_site.pdbx_auth_seq_id' # loop_ _software.name _software.classification _software.version _software.citation_id _software.pdbx_ordinal X-PLOR 'model building' 3.1 ? 1 X-PLOR refinement 3.1 ? 2 X-PLOR phasing 3.1 ? 3 # 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 GLU A 2 ? ? -157.07 -41.75 2 1 ASP A 15 ? ? 163.63 148.74 3 1 LEU A 16 ? ? -50.39 -75.68 4 1 ALA A 18 ? ? -118.39 67.58 5 1 LYS A 20 ? ? -128.96 -95.72 6 1 VAL A 21 ? ? -94.27 -72.81 7 1 ALA A 33 ? ? 163.59 109.91 8 1 LEU A 42 ? ? -56.78 -70.87 9 1 LYS A 48 ? ? -129.79 -59.97 10 1 SER A 51 ? ? 179.50 167.65 11 1 ASN A 63 ? ? -104.09 78.07 12 2 GLU A 2 ? ? -178.69 -40.08 13 2 ASP A 15 ? ? 161.07 136.12 14 2 LYS A 20 ? ? -140.39 -56.46 15 2 TYR A 32 ? ? -109.94 -132.57 16 2 ALA A 33 ? ? 78.50 107.67 17 2 ASP A 37 ? ? -94.27 39.08 18 2 LEU A 42 ? ? -65.14 -70.09 19 2 SER A 51 ? ? 169.49 56.50 20 2 VAL A 57 ? ? -50.01 106.98 21 3 GLN A 3 ? ? 173.06 -42.62 22 3 HIS A 14 ? ? -108.39 -169.38 23 3 ASP A 15 ? ? 162.69 135.95 24 3 TYR A 32 ? ? -96.61 -115.57 25 3 ALA A 33 ? ? 76.66 106.97 26 3 ASN A 63 ? ? -104.57 57.22 27 4 GLN A 3 ? ? 82.73 -43.29 28 4 HIS A 14 ? ? -69.87 -171.39 29 4 ASP A 15 ? ? 169.98 132.28 30 4 LEU A 16 ? ? -42.65 -70.05 31 4 ALA A 18 ? ? -153.70 59.46 32 4 LYS A 19 ? ? -48.92 101.79 33 4 ALA A 33 ? ? 170.47 -32.81 34 4 VAL A 57 ? ? -46.17 104.60 35 4 ASN A 63 ? ? -96.32 55.15 36 5 GLN A 3 ? ? 168.65 -75.29 37 5 ASP A 15 ? ? -160.44 23.27 38 5 LEU A 16 ? ? 81.36 -59.32 39 5 LYS A 19 ? ? -51.17 97.09 40 5 LYS A 20 ? ? -113.16 -89.37 41 5 ILE A 46 ? ? -102.20 -60.03 42 5 SER A 51 ? ? 179.81 150.76 43 5 VAL A 57 ? ? -43.66 107.61 44 5 GLN A 62 ? ? -100.46 -162.79 45 5 ASN A 63 ? ? -117.69 65.84 46 5 ILE A 79 ? ? -47.85 100.05 47 6 GLU A 2 ? ? -176.41 -44.20 48 6 LYS A 6 ? ? -88.92 -73.75 49 6 ASP A 15 ? ? -178.94 139.66 50 6 ALA A 18 ? ? 53.86 109.01 51 6 LYS A 19 ? ? 172.91 59.71 52 6 LYS A 20 ? ? -171.65 -176.19 53 6 ALA A 24 ? ? -49.73 153.23 54 6 ALA A 33 ? ? 168.61 107.93 55 6 ASP A 37 ? ? -174.86 50.31 56 6 LYS A 48 ? ? -159.35 64.57 57 6 VAL A 57 ? ? -48.35 109.99 58 7 GLU A 2 ? ? -113.10 71.60 59 7 GLN A 3 ? ? -175.11 -47.69 60 7 CYS A 13 ? ? -131.64 -39.37 61 7 HIS A 14 ? ? -74.87 -168.63 62 7 ASP A 15 ? ? 166.86 136.15 63 7 LYS A 19 ? ? -42.64 100.66 64 7 VAL A 21 ? ? -126.96 -68.67 65 7 TYR A 32 ? ? -112.39 -127.55 66 7 ALA A 33 ? ? 80.35 108.00 67 7 LYS A 48 ? ? -142.25 11.77 68 7 SER A 51 ? ? 174.74 94.92 69 7 ASN A 63 ? ? -97.33 58.87 70 7 ILE A 79 ? ? -62.06 99.72 71 8 GLN A 3 ? ? 84.04 -25.75 72 8 GLN A 7 ? ? -56.75 -74.77 73 8 ASP A 15 ? ? 162.78 123.16 74 8 ALA A 18 ? ? -164.35 49.96 75 8 LYS A 19 ? ? -49.49 164.94 76 8 LYS A 20 ? ? -150.09 -65.10 77 8 TYR A 32 ? ? -107.71 -139.96 78 8 ALA A 33 ? ? 83.37 112.80 79 8 LYS A 48 ? ? -108.03 -77.46 80 8 SER A 51 ? ? 179.02 156.20 81 8 TRP A 54 ? ? -134.08 -30.71 82 8 ASN A 63 ? ? -110.53 72.77 83 9 GLN A 3 ? ? -142.82 -43.31 84 9 ASP A 15 ? ? 166.99 120.68 85 9 ALA A 18 ? ? -152.78 72.43 86 9 LYS A 20 ? ? -116.59 -77.13 87 9 ALA A 33 ? ? 160.78 109.78 88 9 LYS A 48 ? ? -144.23 31.42 89 9 SER A 51 ? ? 174.89 90.98 90 9 VAL A 57 ? ? -41.56 101.70 91 9 ILE A 79 ? ? -69.79 92.11 92 10 GLU A 2 ? ? -171.32 -40.93 93 10 CYS A 13 ? ? -133.45 -40.04 94 10 ASP A 15 ? ? 163.47 119.37 95 10 LYS A 20 ? ? -142.16 -69.43 96 10 TYR A 32 ? ? -104.38 -149.87 97 10 ALA A 33 ? ? 84.10 -33.73 98 10 LYS A 36 ? ? -96.88 33.68 99 10 ASP A 37 ? ? 169.66 45.18 100 10 LYS A 48 ? ? -123.33 -71.70 101 10 SER A 51 ? ? 177.22 144.18 102 11 ASP A 15 ? ? 164.39 129.02 103 11 LYS A 20 ? ? -160.26 -97.05 104 11 TYR A 32 ? ? -125.64 -145.57 105 11 ALA A 33 ? ? 81.92 109.82 106 11 ARG A 35 ? ? -82.97 36.92 107 11 LYS A 36 ? ? 69.73 -4.70 108 11 ASP A 37 ? ? 167.05 52.87 109 11 LEU A 42 ? ? -47.13 -75.90 110 11 SER A 51 ? ? 168.27 81.80 111 11 ASN A 63 ? ? -88.67 47.16 112 12 GLU A 2 ? ? -179.57 -34.78 113 12 ASP A 15 ? ? 173.19 136.25 114 12 ALA A 18 ? ? -152.73 81.32 115 12 LYS A 19 ? ? -55.16 90.50 116 12 LYS A 20 ? ? -89.97 -156.52 117 12 TYR A 32 ? ? -98.27 -101.89 118 12 ALA A 33 ? ? 72.37 104.97 119 12 SER A 51 ? ? -173.65 143.32 120 12 ASN A 63 ? ? -102.15 60.98 121 13 GLN A 3 ? ? 169.95 -44.77 122 13 ASP A 15 ? ? -176.80 145.77 123 13 ALA A 18 ? ? 55.39 -179.29 124 13 LYS A 19 ? ? 70.53 101.72 125 13 LYS A 20 ? ? 167.22 -166.65 126 13 TYR A 32 ? ? -104.37 -111.63 127 13 ALA A 33 ? ? 75.07 105.63 128 13 LYS A 48 ? ? -111.80 -76.88 129 13 ASN A 63 ? ? -115.86 76.00 130 14 GLU A 2 ? ? -118.77 75.67 131 14 GLN A 3 ? ? -157.47 -55.22 132 14 ASP A 15 ? ? 162.74 135.01 133 14 LYS A 20 ? ? -131.56 -95.80 134 14 ALA A 24 ? ? -49.93 155.84 135 14 SER A 51 ? ? 177.87 84.26 136 14 TRP A 54 ? ? -144.83 35.63 137 14 VAL A 57 ? ? -43.30 103.61 138 15 GLU A 2 ? ? 49.26 85.24 139 15 GLN A 3 ? ? -170.66 -62.31 140 15 HIS A 14 ? ? -62.09 -174.86 141 15 ASP A 15 ? ? 170.70 127.11 142 15 LEU A 16 ? ? -42.36 -71.73 143 15 LYS A 20 ? ? -91.71 -74.46 144 15 TYR A 32 ? ? -88.94 -103.50 145 15 ALA A 33 ? ? 75.40 106.98 146 15 LYS A 48 ? ? -126.71 -78.84 147 16 GLN A 3 ? ? -170.05 -37.32 148 16 GLN A 7 ? ? -53.92 -79.35 149 16 ASP A 15 ? ? 166.69 136.23 150 16 LYS A 19 ? ? -61.47 98.26 151 16 LYS A 20 ? ? -109.07 -97.76 152 16 TYR A 32 ? ? -123.64 -144.42 153 16 ALA A 33 ? ? 78.96 107.46 154 16 ARG A 35 ? ? -61.06 -163.66 155 16 ASP A 37 ? ? 178.77 70.86 156 16 SER A 51 ? ? 176.04 159.57 157 16 VAL A 57 ? ? -46.38 106.62 158 17 GLN A 3 ? ? 179.74 -48.94 159 17 ASP A 15 ? ? 164.29 124.02 160 17 ALA A 18 ? ? -158.10 58.56 161 17 LYS A 20 ? ? -122.81 -105.45 162 17 TYR A 32 ? ? -106.55 -143.63 163 17 ALA A 33 ? ? 83.55 -37.70 164 17 ASP A 37 ? ? -178.85 44.92 165 17 LYS A 48 ? ? -104.25 -72.68 166 18 GLU A 2 ? ? -165.30 62.94 167 18 GLN A 3 ? ? -172.25 -49.42 168 18 LYS A 6 ? ? -54.78 -71.74 169 18 ASP A 15 ? ? 164.68 126.61 170 18 LYS A 19 ? ? -53.02 108.97 171 18 LYS A 20 ? ? -114.06 -147.20 172 18 TYR A 32 ? ? -106.88 -142.65 173 18 ALA A 33 ? ? 80.98 107.38 174 18 LYS A 48 ? ? -125.01 -66.70 175 18 SER A 56 ? ? -113.16 51.60 176 18 ASN A 63 ? ? -109.34 52.07 177 19 GLU A 2 ? ? 179.93 42.30 178 19 ASP A 15 ? ? 175.58 137.21 179 19 ALA A 18 ? ? 49.31 98.34 180 19 LYS A 19 ? ? 171.04 88.34 181 19 LYS A 20 ? ? 175.26 -153.31 182 19 TYR A 32 ? ? -101.44 -123.44 183 19 ALA A 33 ? ? 81.24 109.95 184 19 LYS A 48 ? ? -149.18 -71.67 185 19 SER A 51 ? ? 179.25 143.57 186 19 TRP A 54 ? ? -152.66 33.15 187 19 ASN A 63 ? ? -98.86 50.07 188 20 GLU A 2 ? ? 46.34 86.40 189 20 GLN A 3 ? ? 179.17 -54.21 190 20 ASP A 15 ? ? 164.06 147.94 191 20 ALA A 18 ? ? -140.44 55.10 192 20 LYS A 20 ? ? -122.52 -91.39 193 20 ALA A 33 ? ? 175.32 107.80 194 20 LYS A 48 ? ? -146.66 -46.19 195 20 SER A 56 ? ? -95.61 41.72 196 20 GLN A 62 ? ? -118.86 -166.62 197 20 ASN A 63 ? ? -113.19 77.62 # _pdbx_entity_nonpoly.entity_id 2 _pdbx_entity_nonpoly.name 'HEME C' _pdbx_entity_nonpoly.comp_id HEC #