data_5EBX # _entry.id 5EBX # _audit_conform.dict_name mmcif_pdbx.dic _audit_conform.dict_version 5.287 _audit_conform.dict_location http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic # loop_ _database_2.database_id _database_2.database_code PDB 5EBX WWPDB D_1000179701 # _pdbx_database_related.db_name PDB _pdbx_database_related.db_id 3EBX _pdbx_database_related.details . _pdbx_database_related.content_type unspecified # _pdbx_database_status.status_code REL _pdbx_database_status.entry_id 5EBX _pdbx_database_status.recvd_initial_deposition_date 1989-12-20 _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.methods_development_category ? # loop_ _audit_author.name _audit_author.pdbx_ordinal 'Corfield, P.W.R.' 1 'Lee, T.-J.' 2 'Low, B.W.' 3 # loop_ _citation.id _citation.title _citation.journal_abbrev _citation.journal_volume _citation.page_first _citation.page_last _citation.year _citation.journal_id_ASTM _citation.country _citation.journal_id_ISSN _citation.journal_id_CSD _citation.book_publisher _citation.pdbx_database_id_PubMed _citation.pdbx_database_id_DOI primary 'The crystal structure of erabutoxin a at 2.0-A resolution.' J.Biol.Chem. 264 9239 9242 1989 JBCHA3 US 0021-9258 0071 ? 2722828 ? 1 'Refinement at 1.4 Angstroms Resolution of a Model of Erabutoxin B. Treatment of Ordered Solvent and Discrete Disorder' 'Acta Crystallogr.,Sect.A' 44 357 ? 1988 ACACEQ DK 0108-7673 0621 ? ? ? 2 'Alpha-Toxin Binding to Acetylcholine Receptor Alpha 179-191 Peptides. Intrinsic Fluorescence Studies' 'FEBS Lett.' 231 212 ? 1988 FEBLAL NE 0014-5793 0165 ? ? ? 3 'Acetylcholine Receptor. Alpha-Toxin Binding Site. Theoretical and Model Studies' 'Asia Pac.J.Pharmacol.' 2 115 ? 1987 APJPEV SI 0217-9687 0852 ? ? ? 4 'Erabutoxin B. Initial Protein Refinement and Sequence Analysis at 0.140 Nanometers Resolution' Eur.J.Biochem. 153 521 ? 1985 EJBCAI IX 0014-2956 0262 ? ? ? 5 'The Three-Dimensional Structure of Postsynaptic Snake Neurotoxins. Consideration of Structure and Function' Handb.Exp.Pharmacol. 52 213 ? 1979 HEPHD2 GW 0171-2004 0884 ? ? ? 6 'X-Ray Crystallographic Study of the Erabutoxins and of a Diiodo Derivative' J.Biol.Chem. 246 4366 ? 1971 JBCHA3 US 0021-9258 0071 ? ? ? # loop_ _citation_author.citation_id _citation_author.name _citation_author.ordinal primary 'Corfield, P.W.' 1 primary 'Lee, T.J.' 2 primary 'Low, B.W.' 3 1 'Smith, J.L.' 4 1 'Corfield, P.W.R.' 5 1 'Hendrickson, W.A.' 6 1 'Low, B.W.' 7 2 'Radding, W.' 8 2 'Corfield, P.W.R.' 9 2 'Levinson, L.S.' 10 2 'Hashim, G.A.' 11 2 'Low, B.W.' 12 3 'Low, B.W.' 13 3 'Corfield, P.W.R.' 14 4 'Bourne, P.E.' 15 4 'Sato, A.' 16 4 'Corfield, P.W.R.' 17 4 'Rosen, L.S.' 18 4 'Birken, S.' 19 4 'Low, B.W.' 20 5 'Low, B.W.' 21 6 'Low, B.W.' 22 6 'Potter, R.' 23 6 'Jackson, R.B.' 24 6 'Tamiya, N.' 25 6 'Sato, S.' 26 # _cell.entry_id 5EBX _cell.length_a 50.140 _cell.length_b 46.970 _cell.length_c 20.870 _cell.angle_alpha 90.00 _cell.angle_beta 90.00 _cell.angle_gamma 90.00 _cell.Z_PDB 4 _cell.pdbx_unique_axis ? # _symmetry.entry_id 5EBX _symmetry.space_group_name_H-M 'P 21 21 21' _symmetry.pdbx_full_space_group_name_H-M ? _symmetry.cell_setting ? _symmetry.Int_Tables_number 19 # 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 'ERABUTOXIN A' 6853.715 1 ? ? ? ? 2 non-polymer syn 'SULFATE ION' 96.063 1 ? ? ? ? 3 water nat water 18.015 62 ? ? ? ? # _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 RICFNHQSSQPQTTKTCSPGESSCYNKQWSDFRGTIIERGCGCPTVKPGIKLSCCESEVCNN _entity_poly.pdbx_seq_one_letter_code_can RICFNHQSSQPQTTKTCSPGESSCYNKQWSDFRGTIIERGCGCPTVKPGIKLSCCESEVCNN _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 ARG n 1 2 ILE n 1 3 CYS n 1 4 PHE n 1 5 ASN n 1 6 HIS n 1 7 GLN n 1 8 SER n 1 9 SER n 1 10 GLN n 1 11 PRO n 1 12 GLN n 1 13 THR n 1 14 THR n 1 15 LYS n 1 16 THR n 1 17 CYS n 1 18 SER n 1 19 PRO n 1 20 GLY n 1 21 GLU n 1 22 SER n 1 23 SER n 1 24 CYS n 1 25 TYR n 1 26 ASN n 1 27 LYS n 1 28 GLN n 1 29 TRP n 1 30 SER n 1 31 ASP n 1 32 PHE n 1 33 ARG n 1 34 GLY n 1 35 THR n 1 36 ILE n 1 37 ILE n 1 38 GLU n 1 39 ARG n 1 40 GLY n 1 41 CYS n 1 42 GLY n 1 43 CYS n 1 44 PRO n 1 45 THR n 1 46 VAL n 1 47 LYS n 1 48 PRO n 1 49 GLY n 1 50 ILE n 1 51 LYS n 1 52 LEU n 1 53 SER n 1 54 CYS n 1 55 CYS n 1 56 GLU n 1 57 SER n 1 58 GLU n 1 59 VAL n 1 60 CYS n 1 61 ASN n 1 62 ASN 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 'broad-banded blue sea krait' _entity_src_gen.gene_src_genus Laticauda _entity_src_gen.pdbx_gene_src_gene ? _entity_src_gen.gene_src_species ? _entity_src_gen.gene_src_strain ? _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 'Laticauda semifasciata' _entity_src_gen.pdbx_gene_src_ncbi_taxonomy_id 8631 _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 ? _entity_src_gen.pdbx_host_org_ncbi_taxonomy_id ? _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 ? _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 ? # _struct_ref.id 1 _struct_ref.db_name UNP _struct_ref.db_code NXSA_LATSE _struct_ref.entity_id 1 _struct_ref.pdbx_db_accession P60775 _struct_ref.pdbx_align_begin 1 _struct_ref.pdbx_seq_one_letter_code ;MKTLLLTLVVVTIVCLDLGYTRICFNHQSSQPQTTKTCSPGESSCYNKQWSDFRGTIIERGCGCPTVKPGIKLSCCESEV CNN ; _struct_ref.pdbx_db_isoform ? # _struct_ref_seq.align_id 1 _struct_ref_seq.ref_id 1 _struct_ref_seq.pdbx_PDB_id_code 5EBX _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 62 _struct_ref_seq.pdbx_seq_align_end_ins_code ? _struct_ref_seq.pdbx_db_accession P60775 _struct_ref_seq.db_align_beg 22 _struct_ref_seq.pdbx_db_align_beg_ins_code ? _struct_ref_seq.db_align_end 83 _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 62 # 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 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 HIS 'L-peptide linking' y HISTIDINE ? 'C6 H10 N3 O2 1' 156.162 HOH non-polymer . WATER ? 'H2 O' 18.015 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 PHE 'L-peptide linking' y PHENYLALANINE ? 'C9 H11 N O2' 165.189 PRO 'L-peptide linking' y PROLINE ? 'C5 H9 N O2' 115.130 SER 'L-peptide linking' y SERINE ? 'C3 H7 N O3' 105.093 SO4 non-polymer . 'SULFATE ION' ? 'O4 S -2' 96.063 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 # _exptl.entry_id 5EBX _exptl.method 'X-RAY DIFFRACTION' _exptl.crystals_number ? # _exptl_crystal.id 1 _exptl_crystal.density_meas ? _exptl_crystal.density_Matthews 1.79 _exptl_crystal.density_percent_sol 31.39 _exptl_crystal.description ? # _refine.entry_id 5EBX _refine.ls_number_reflns_obs 2680 _refine.ls_number_reflns_all ? _refine.pdbx_ls_sigma_I 2.0 _refine.pdbx_ls_sigma_F ? _refine.pdbx_data_cutoff_high_absF ? _refine.pdbx_data_cutoff_low_absF ? _refine.pdbx_data_cutoff_high_rms_absF ? _refine.ls_d_res_low 10.0 _refine.ls_d_res_high 2.0 _refine.ls_percent_reflns_obs ? _refine.ls_R_factor_obs 0.168 _refine.ls_R_factor_all ? _refine.ls_R_factor_R_work ? _refine.ls_R_factor_R_free ? _refine.ls_R_factor_R_free_error ? _refine.ls_R_factor_R_free_error_details ? _refine.ls_percent_reflns_R_free ? _refine.ls_number_reflns_R_free ? _refine.ls_number_parameters ? _refine.ls_number_restraints ? _refine.occupancy_min ? _refine.occupancy_max ? _refine.B_iso_mean ? _refine.aniso_B[1][1] ? _refine.aniso_B[2][2] ? _refine.aniso_B[3][3] ? _refine.aniso_B[1][2] ? _refine.aniso_B[1][3] ? _refine.aniso_B[2][3] ? _refine.solvent_model_details ? _refine.solvent_model_param_ksol ? _refine.solvent_model_param_bsol ? _refine.pdbx_ls_cross_valid_method ? _refine.details ? _refine.pdbx_starting_model ? _refine.pdbx_method_to_determine_struct ? _refine.pdbx_isotropic_thermal_model ? _refine.pdbx_stereochemistry_target_values ? _refine.pdbx_stereochem_target_val_spec_case ? _refine.pdbx_R_Free_selection_details ? _refine.pdbx_overall_ESU_R ? _refine.pdbx_overall_ESU_R_Free ? _refine.overall_SU_ML ? _refine.overall_SU_B ? _refine.pdbx_refine_id 'X-RAY DIFFRACTION' _refine.pdbx_diffrn_id 1 _refine.pdbx_TLS_residual_ADP_flag ? _refine.correlation_coeff_Fo_to_Fc ? _refine.correlation_coeff_Fo_to_Fc_free ? _refine.pdbx_solvent_vdw_probe_radii ? _refine.pdbx_solvent_ion_probe_radii ? _refine.pdbx_solvent_shrinkage_radii ? _refine.pdbx_overall_phase_error ? _refine.overall_SU_R_Cruickshank_DPI ? _refine.pdbx_overall_SU_R_free_Cruickshank_DPI ? _refine.pdbx_overall_SU_R_Blow_DPI ? _refine.pdbx_overall_SU_R_free_Blow_DPI ? # _refine_hist.pdbx_refine_id 'X-RAY DIFFRACTION' _refine_hist.cycle_id LAST _refine_hist.pdbx_number_atoms_protein 476 _refine_hist.pdbx_number_atoms_nucleic_acid 0 _refine_hist.pdbx_number_atoms_ligand 5 _refine_hist.number_atoms_solvent 62 _refine_hist.number_atoms_total 543 _refine_hist.d_res_high 2.0 _refine_hist.d_res_low 10.0 # loop_ _refine_ls_restr.type _refine_ls_restr.dev_ideal _refine_ls_restr.dev_ideal_target _refine_ls_restr.weight _refine_ls_restr.number _refine_ls_restr.pdbx_refine_id _refine_ls_restr.pdbx_restraint_function p_bond_d 0.011 0.020 ? ? 'X-RAY DIFFRACTION' ? p_angle_d 0.026 0.030 ? ? 'X-RAY DIFFRACTION' ? p_angle_deg ? ? ? ? 'X-RAY DIFFRACTION' ? p_planar_d 0.040 0.060 ? ? 'X-RAY DIFFRACTION' ? p_hb_or_metal_coord ? ? ? ? 'X-RAY DIFFRACTION' ? p_mcbond_it 0.661 1.500 ? ? 'X-RAY DIFFRACTION' ? p_mcangle_it 1.100 2.000 ? ? 'X-RAY DIFFRACTION' ? p_scbond_it 1.276 2.000 ? ? 'X-RAY DIFFRACTION' ? p_scangle_it 1.986 3.000 ? ? 'X-RAY DIFFRACTION' ? p_plane_restr 0.010 0.020 ? ? 'X-RAY DIFFRACTION' ? p_chiral_restr 0.130 0.150 ? ? 'X-RAY DIFFRACTION' ? p_singtor_nbd 0.130 0.200 ? ? 'X-RAY DIFFRACTION' ? p_multtor_nbd 0.150 0.200 ? ? 'X-RAY DIFFRACTION' ? p_xhyhbond_nbd 0.144 0.200 ? ? 'X-RAY DIFFRACTION' ? p_xyhbond_nbd ? ? ? ? 'X-RAY DIFFRACTION' ? p_planar_tor 2.0 3.0 ? ? 'X-RAY DIFFRACTION' ? p_staggered_tor 19.8 15.0 ? ? 'X-RAY DIFFRACTION' ? p_orthonormal_tor 15.9 20.0 ? ? 'X-RAY DIFFRACTION' ? p_transverse_tor ? ? ? ? 'X-RAY DIFFRACTION' ? p_special_tor ? ? ? ? 'X-RAY DIFFRACTION' ? # _struct.entry_id 5EBX _struct.title 'THE CRYSTAL STRUCTURE OF ERABUTOXIN A AT 2.0 ANGSTROMS RESOLUTION' _struct.pdbx_descriptor 'ERABUTOXIN A' _struct.pdbx_model_details ? _struct.pdbx_CASP_flag ? _struct.pdbx_model_type_details ? # _struct_keywords.entry_id 5EBX _struct_keywords.pdbx_keywords TOXIN _struct_keywords.text TOXIN # 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 2 ? C N N 3 ? # _struct_biol.id 1 # 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 disulf1 disulf ? ? A CYS 3 SG ? ? ? 1_555 A CYS 24 SG ? ? A CYS 3 A CYS 24 1_555 ? ? ? ? ? ? ? 2.037 ? disulf2 disulf ? ? A CYS 17 SG ? ? ? 1_555 A CYS 41 SG ? ? A CYS 17 A CYS 41 1_555 ? ? ? ? ? ? ? 2.016 ? disulf3 disulf ? ? A CYS 43 SG ? ? ? 1_555 A CYS 54 SG ? ? A CYS 43 A CYS 54 1_555 ? ? ? ? ? ? ? 2.040 ? disulf4 disulf ? ? A CYS 55 SG ? ? ? 1_555 A CYS 60 SG ? ? A CYS 55 A CYS 60 1_555 ? ? ? ? ? ? ? 2.026 ? # _struct_conn_type.id disulf _struct_conn_type.criteria ? _struct_conn_type.reference ? # loop_ _struct_sheet.id _struct_sheet.type _struct_sheet.number_strands _struct_sheet.details AB ? 2 ? DCE ? 3 ? # loop_ _struct_sheet_order.sheet_id _struct_sheet_order.range_id_1 _struct_sheet_order.range_id_2 _struct_sheet_order.offset _struct_sheet_order.sense AB 1 2 ? anti-parallel DCE 1 2 ? anti-parallel DCE 2 3 ? parallel # loop_ _struct_sheet_range.sheet_id _struct_sheet_range.id _struct_sheet_range.beg_label_comp_id _struct_sheet_range.beg_label_asym_id _struct_sheet_range.beg_label_seq_id _struct_sheet_range.pdbx_beg_PDB_ins_code _struct_sheet_range.end_label_comp_id _struct_sheet_range.end_label_asym_id _struct_sheet_range.end_label_seq_id _struct_sheet_range.pdbx_end_PDB_ins_code _struct_sheet_range.beg_auth_comp_id _struct_sheet_range.beg_auth_asym_id _struct_sheet_range.beg_auth_seq_id _struct_sheet_range.end_auth_comp_id _struct_sheet_range.end_auth_asym_id _struct_sheet_range.end_auth_seq_id AB 1 ARG A 1 ? ASN A 5 ? ARG A 1 ASN A 5 AB 2 THR A 13 ? CYS A 17 ? THR A 13 CYS A 17 DCE 1 GLY A 34 ? GLY A 42 ? GLY A 34 GLY A 42 DCE 2 SER A 23 ? ASP A 31 ? SER A 23 ASP A 31 DCE 3 ILE A 50 ? CYS A 55 ? ILE A 50 CYS A 55 # loop_ _pdbx_struct_sheet_hbond.sheet_id _pdbx_struct_sheet_hbond.range_id_1 _pdbx_struct_sheet_hbond.range_id_2 _pdbx_struct_sheet_hbond.range_1_label_atom_id _pdbx_struct_sheet_hbond.range_1_label_comp_id _pdbx_struct_sheet_hbond.range_1_label_asym_id _pdbx_struct_sheet_hbond.range_1_label_seq_id _pdbx_struct_sheet_hbond.range_1_PDB_ins_code _pdbx_struct_sheet_hbond.range_1_auth_atom_id _pdbx_struct_sheet_hbond.range_1_auth_comp_id _pdbx_struct_sheet_hbond.range_1_auth_asym_id _pdbx_struct_sheet_hbond.range_1_auth_seq_id _pdbx_struct_sheet_hbond.range_2_label_atom_id _pdbx_struct_sheet_hbond.range_2_label_comp_id _pdbx_struct_sheet_hbond.range_2_label_asym_id _pdbx_struct_sheet_hbond.range_2_label_seq_id _pdbx_struct_sheet_hbond.range_2_PDB_ins_code _pdbx_struct_sheet_hbond.range_2_auth_atom_id _pdbx_struct_sheet_hbond.range_2_auth_comp_id _pdbx_struct_sheet_hbond.range_2_auth_asym_id _pdbx_struct_sheet_hbond.range_2_auth_seq_id AB 1 2 N CYS A 3 ? N CYS A 3 O LYS A 15 ? O LYS A 15 DCE 1 2 N TYR A 25 ? N TYR A 25 O GLY A 40 ? O GLY A 40 DCE 2 3 N ASN A 26 ? N ASN A 26 O SER A 53 ? O SER A 53 # loop_ _struct_site.id _struct_site.pdbx_evidence_code _struct_site.pdbx_auth_asym_id _struct_site.pdbx_auth_comp_id _struct_site.pdbx_auth_seq_id _struct_site.pdbx_auth_ins_code _struct_site.pdbx_num_residues _struct_site.details RCT Author ? ? ? ? 20 ;THE SERIES INVARIANT RESIDUES OF THE REACTIVE SITE. FIVE OF THESE RESIDUES (PHE 32, ILE 36, GLU 38, ILE 50, LEU 52) ARE TYPE-CONSERVED THROUGHOUT THE SERIES. THE ENUMERATION IS FOR A 62-RESIDUE TOXIN ; FNR Author ? ? ? ? 4 'RESIDUES IN THE REACTIVE SITE SHOWN CHEMICALLY TO BIND DIRECTLY TO RECEPTOR' CMR Author ? ? ? ? 13 'RESIDUES, INCLUDING FOUR CYSTINE LINKAGES, WHICH AID IN MAINTAINING THE UNIQUE TOXIN FOLD CONFORMATION' AC1 Software ? ? ? ? 7 'BINDING SITE FOR RESIDUE SO4 A 63' # 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 RCT 20 TYR A 25 ? TYR A 25 . ? 1_555 ? 2 RCT 20 LYS A 27 ? LYS A 27 . ? 1_555 ? 3 RCT 20 TRP A 29 ? TRP A 29 . ? 1_555 ? 4 RCT 20 ASP A 31 ? ASP A 31 . ? 1_555 ? 5 RCT 20 PHE A 32 ? PHE A 32 . ? 1_555 ? 6 RCT 20 ARG A 33 ? ARG A 33 . ? 1_555 ? 7 RCT 20 GLY A 34 ? GLY A 34 . ? 1_555 ? 8 RCT 20 ILE A 36 ? ILE A 36 . ? 1_555 ? 9 RCT 20 GLU A 38 ? GLU A 38 . ? 1_555 ? 10 RCT 20 GLY A 40 ? GLY A 40 . ? 1_555 ? 11 RCT 20 CYS A 41 ? CYS A 41 . ? 1_555 ? 12 RCT 20 GLY A 42 ? GLY A 42 . ? 1_555 ? 13 RCT 20 CYS A 43 ? CYS A 43 . ? 1_555 ? 14 RCT 20 PRO A 44 ? PRO A 44 . ? 1_555 ? 15 RCT 20 VAL A 46 ? VAL A 46 . ? 1_555 ? 16 RCT 20 LYS A 47 ? LYS A 47 . ? 1_555 ? 17 RCT 20 GLY A 49 ? GLY A 49 . ? 1_555 ? 18 RCT 20 ILE A 50 ? ILE A 50 . ? 1_555 ? 19 RCT 20 LEU A 52 ? LEU A 52 . ? 1_555 ? 20 RCT 20 CYS A 54 ? CYS A 54 . ? 1_555 ? 21 FNR 4 LYS A 27 ? LYS A 27 . ? 1_555 ? 22 FNR 4 TRP A 29 ? TRP A 29 . ? 1_555 ? 23 FNR 4 ARG A 33 ? ARG A 33 . ? 1_555 ? 24 FNR 4 LYS A 47 ? LYS A 47 . ? 1_555 ? 25 CMR 13 CYS A 3 ? CYS A 3 . ? 1_555 ? 26 CMR 13 PHE A 4 ? PHE A 4 . ? 1_555 ? 27 CMR 13 CYS A 17 ? CYS A 17 . ? 1_555 ? 28 CMR 13 CYS A 24 ? CYS A 24 . ? 1_555 ? 29 CMR 13 TYR A 25 ? TYR A 25 . ? 1_555 ? 30 CMR 13 GLY A 40 ? GLY A 40 . ? 1_555 ? 31 CMR 13 CYS A 41 ? CYS A 41 . ? 1_555 ? 32 CMR 13 GLY A 42 ? GLY A 42 . ? 1_555 ? 33 CMR 13 CYS A 43 ? CYS A 43 . ? 1_555 ? 34 CMR 13 CYS A 54 ? CYS A 54 . ? 1_555 ? 35 CMR 13 CYS A 55 ? CYS A 55 . ? 1_555 ? 36 CMR 13 CYS A 60 ? CYS A 60 . ? 1_555 ? 37 CMR 13 ASN A 61 ? ASN A 61 . ? 1_555 ? 38 AC1 7 ARG A 1 ? ARG A 1 . ? 1_556 ? 39 AC1 7 ASN A 5 ? ASN A 5 . ? 1_555 ? 40 AC1 7 LYS A 15 ? LYS A 15 . ? 1_555 ? 41 AC1 7 GLU A 56 ? GLU A 56 . ? 1_556 ? 42 AC1 7 HOH C . ? HOH A 103 . ? 1_555 ? 43 AC1 7 HOH C . ? HOH A 112 . ? 1_556 ? 44 AC1 7 HOH C . ? HOH A 127 . ? 1_555 ? # _database_PDB_matrix.entry_id 5EBX _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 5EBX _atom_sites.fract_transf_matrix[1][1] 0.019944 _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] 0.021290 _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] 0.047916 _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 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 ARG 1 1 1 ARG ARG A . n A 1 2 ILE 2 2 2 ILE ILE A . n A 1 3 CYS 3 3 3 CYS CYS A . n A 1 4 PHE 4 4 4 PHE PHE A . n A 1 5 ASN 5 5 5 ASN ASN A . n A 1 6 HIS 6 6 6 HIS HIS A . n A 1 7 GLN 7 7 7 GLN GLN A . n A 1 8 SER 8 8 8 SER SER A . n A 1 9 SER 9 9 9 SER SER A . n A 1 10 GLN 10 10 10 GLN GLN A . n A 1 11 PRO 11 11 11 PRO PRO A . n A 1 12 GLN 12 12 12 GLN GLN A . n A 1 13 THR 13 13 13 THR THR A . n A 1 14 THR 14 14 14 THR THR A . n A 1 15 LYS 15 15 15 LYS LYS A . n A 1 16 THR 16 16 16 THR THR A . n A 1 17 CYS 17 17 17 CYS CYS A . n A 1 18 SER 18 18 18 SER SER A . n A 1 19 PRO 19 19 19 PRO PRO A . n A 1 20 GLY 20 20 20 GLY GLY A . n A 1 21 GLU 21 21 21 GLU GLU A . n A 1 22 SER 22 22 22 SER SER A . n A 1 23 SER 23 23 23 SER SER A . n A 1 24 CYS 24 24 24 CYS CYS A . n A 1 25 TYR 25 25 25 TYR TYR A . n A 1 26 ASN 26 26 26 ASN ASN A . n A 1 27 LYS 27 27 27 LYS LYS A . n A 1 28 GLN 28 28 28 GLN GLN A . n A 1 29 TRP 29 29 29 TRP TRP A . n A 1 30 SER 30 30 30 SER SER A . n A 1 31 ASP 31 31 31 ASP ASP A . n A 1 32 PHE 32 32 32 PHE PHE A . n A 1 33 ARG 33 33 33 ARG ARG A . n A 1 34 GLY 34 34 34 GLY GLY A . n A 1 35 THR 35 35 35 THR THR A . n A 1 36 ILE 36 36 36 ILE ILE A . n A 1 37 ILE 37 37 37 ILE ILE A . n A 1 38 GLU 38 38 38 GLU GLU A . n A 1 39 ARG 39 39 39 ARG ARG A . n A 1 40 GLY 40 40 40 GLY GLY A . n A 1 41 CYS 41 41 41 CYS CYS A . n A 1 42 GLY 42 42 42 GLY GLY A . n A 1 43 CYS 43 43 43 CYS CYS A . n A 1 44 PRO 44 44 44 PRO PRO A . n A 1 45 THR 45 45 45 THR THR A . n A 1 46 VAL 46 46 46 VAL VAL A . n A 1 47 LYS 47 47 47 LYS LYS A . n A 1 48 PRO 48 48 48 PRO PRO A . n A 1 49 GLY 49 49 49 GLY GLY A . n A 1 50 ILE 50 50 50 ILE ILE A . n A 1 51 LYS 51 51 51 LYS LYS A . n A 1 52 LEU 52 52 52 LEU LEU A . n A 1 53 SER 53 53 53 SER SER A . n A 1 54 CYS 54 54 54 CYS CYS A . n A 1 55 CYS 55 55 55 CYS CYS A . n A 1 56 GLU 56 56 56 GLU GLU A . n A 1 57 SER 57 57 57 SER SER A . n A 1 58 GLU 58 58 58 GLU GLU A . n A 1 59 VAL 59 59 59 VAL VAL A . n A 1 60 CYS 60 60 60 CYS CYS A . n A 1 61 ASN 61 61 61 ASN ASN A . n A 1 62 ASN 62 62 62 ASN ASN A . n # loop_ _pdbx_nonpoly_scheme.asym_id _pdbx_nonpoly_scheme.entity_id _pdbx_nonpoly_scheme.mon_id _pdbx_nonpoly_scheme.ndb_seq_num _pdbx_nonpoly_scheme.pdb_seq_num _pdbx_nonpoly_scheme.auth_seq_num _pdbx_nonpoly_scheme.pdb_mon_id _pdbx_nonpoly_scheme.auth_mon_id _pdbx_nonpoly_scheme.pdb_strand_id _pdbx_nonpoly_scheme.pdb_ins_code B 2 SO4 1 63 63 SO4 SO4 A . C 3 HOH 1 64 64 HOH HOH A . C 3 HOH 2 65 65 HOH HOH A . C 3 HOH 3 66 66 HOH HOH A . C 3 HOH 4 67 67 HOH HOH A . C 3 HOH 5 68 68 HOH HOH A . C 3 HOH 6 69 69 HOH HOH A . C 3 HOH 7 71 71 HOH HOH A . C 3 HOH 8 72 72 HOH HOH A . C 3 HOH 9 73 73 HOH HOH A . C 3 HOH 10 74 74 HOH HOH A . C 3 HOH 11 75 75 HOH HOH A . C 3 HOH 12 77 77 HOH HOH A . C 3 HOH 13 78 78 HOH HOH A . C 3 HOH 14 79 79 HOH HOH A . C 3 HOH 15 80 80 HOH HOH A . C 3 HOH 16 81 81 HOH HOH A . C 3 HOH 17 82 82 HOH HOH A . C 3 HOH 18 83 83 HOH HOH A . C 3 HOH 19 88 88 HOH HOH A . C 3 HOH 20 89 89 HOH HOH A . C 3 HOH 21 91 91 HOH HOH A . C 3 HOH 22 92 92 HOH HOH A . C 3 HOH 23 93 93 HOH HOH A . C 3 HOH 24 96 96 HOH HOH A . C 3 HOH 25 101 101 HOH HOH A . C 3 HOH 26 102 102 HOH HOH A . C 3 HOH 27 103 103 HOH HOH A . C 3 HOH 28 108 108 HOH HOH A . C 3 HOH 29 111 111 HOH HOH A . C 3 HOH 30 112 112 HOH HOH A . C 3 HOH 31 114 114 HOH HOH A . C 3 HOH 32 117 117 HOH HOH A . C 3 HOH 33 121 121 HOH HOH A . C 3 HOH 34 124 124 HOH HOH A . C 3 HOH 35 126 126 HOH HOH A . C 3 HOH 36 127 127 HOH HOH A . C 3 HOH 37 129 129 HOH HOH A . C 3 HOH 38 130 130 HOH HOH A . C 3 HOH 39 134 134 HOH HOH A . C 3 HOH 40 201 201 HOH HOH A . C 3 HOH 41 203 203 HOH HOH A . C 3 HOH 42 204 204 HOH HOH A . C 3 HOH 43 207 207 HOH HOH A . C 3 HOH 44 209 209 HOH HOH A . C 3 HOH 45 210 210 HOH HOH A . C 3 HOH 46 213 213 HOH HOH A . C 3 HOH 47 218 218 HOH HOH A . C 3 HOH 48 220 220 HOH HOH A . C 3 HOH 49 222 222 HOH HOH A . C 3 HOH 50 226 226 HOH HOH A . C 3 HOH 51 229 229 HOH HOH A . C 3 HOH 52 230 230 HOH HOH A . C 3 HOH 53 235 235 HOH HOH A . C 3 HOH 54 254 254 HOH HOH A . C 3 HOH 55 255 255 HOH HOH A . C 3 HOH 56 256 256 HOH HOH A . C 3 HOH 57 259 259 HOH HOH A . C 3 HOH 58 262 262 HOH HOH A . C 3 HOH 59 263 263 HOH HOH A . C 3 HOH 60 271 271 HOH HOH A . C 3 HOH 61 272 272 HOH HOH A . C 3 HOH 62 276 276 HOH HOH A . # _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,C # _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_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 1990-04-15 2 'Structure model' 1 1 2008-03-03 3 'Structure model' 1 2 2011-07-13 4 'Structure model' 1 3 2017-11-29 # _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 ? # 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' 'Derived calculations' 4 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' pdbx_database_status 2 4 'Structure model' struct_conf # _pdbx_audit_revision_item.ordinal 1 _pdbx_audit_revision_item.revision_ordinal 4 _pdbx_audit_revision_item.data_content_type 'Structure model' _pdbx_audit_revision_item.item '_pdbx_database_status.process_site' # _software.name PROLSQ _software.classification refinement _software.version . _software.citation_id ? _software.pdbx_ordinal 1 # _pdbx_entry_details.entry_id 5EBX _pdbx_entry_details.compound_details ;ERABUTOXINS A AND B ARE SHORT-CHAIN POSTSYNAPTIC NEUROTOXINS ISOLATED FROM THE VENOM OF THE SEA-SNAKE LATICAUDA SEMIFASCIA, FOUND OFF THE OKINAWAS. THE POSTSYNAPTIC NEUROTOXINS ARE ANTAGONISTS OF THE NICOTINIC ACETYLCHOLINE RECEPTOR. HOMOLOGY EXISTS BETWEEN ALL THESE VENOM NEUROTOXINS FOR BOTH SHORT AND LONG CHAIN SERIES. (SEE REFERENCE 6 ABOVE FOR DETAILS). THE CLOSE STRUCTURAL SIMILARITY BETWEEN EA AND EB, PARTICULARLY BETWEEN THE EA AND EB REACTIVE SITE DOMAINS, SUPPORTS THE HIGH RESOLUTION EB STRUCTURE AS A VALID PROTOTYPE FOR ALL OF THE POSTSYNAPTIC NEUROTOXINS OF THE SHORT SNAKE VENOM SERIES. IN ADDITION, THE SPECIFIC ROLE PROPOSED (REFERENCE 4) FOR THE HIGHLY MOBILE PERIPHERAL SEGMENT PRO 44 - GLY 49 IN NEUROTOXIN BINDING TO THE ACETYLCHOLINE RECEPTOR, IS SUPPORTED BY THE DISTRIBUTION OF THERMAL PARAMETERS IN THIS REGION OF EA. ; _pdbx_entry_details.source_details ? _pdbx_entry_details.nonpolymer_details ? _pdbx_entry_details.sequence_details ? # _pdbx_validate_symm_contact.id 1 _pdbx_validate_symm_contact.PDB_model_num 1 _pdbx_validate_symm_contact.auth_atom_id_1 O _pdbx_validate_symm_contact.auth_asym_id_1 A _pdbx_validate_symm_contact.auth_comp_id_1 VAL _pdbx_validate_symm_contact.auth_seq_id_1 46 _pdbx_validate_symm_contact.PDB_ins_code_1 ? _pdbx_validate_symm_contact.label_alt_id_1 ? _pdbx_validate_symm_contact.site_symmetry_1 1_555 _pdbx_validate_symm_contact.auth_atom_id_2 O _pdbx_validate_symm_contact.auth_asym_id_2 A _pdbx_validate_symm_contact.auth_comp_id_2 HOH _pdbx_validate_symm_contact.auth_seq_id_2 209 _pdbx_validate_symm_contact.PDB_ins_code_2 ? _pdbx_validate_symm_contact.label_alt_id_2 ? _pdbx_validate_symm_contact.site_symmetry_2 2_565 _pdbx_validate_symm_contact.dist 2.00 # loop_ _pdbx_validate_rmsd_angle.id _pdbx_validate_rmsd_angle.PDB_model_num _pdbx_validate_rmsd_angle.auth_atom_id_1 _pdbx_validate_rmsd_angle.auth_asym_id_1 _pdbx_validate_rmsd_angle.auth_comp_id_1 _pdbx_validate_rmsd_angle.auth_seq_id_1 _pdbx_validate_rmsd_angle.PDB_ins_code_1 _pdbx_validate_rmsd_angle.label_alt_id_1 _pdbx_validate_rmsd_angle.auth_atom_id_2 _pdbx_validate_rmsd_angle.auth_asym_id_2 _pdbx_validate_rmsd_angle.auth_comp_id_2 _pdbx_validate_rmsd_angle.auth_seq_id_2 _pdbx_validate_rmsd_angle.PDB_ins_code_2 _pdbx_validate_rmsd_angle.label_alt_id_2 _pdbx_validate_rmsd_angle.auth_atom_id_3 _pdbx_validate_rmsd_angle.auth_asym_id_3 _pdbx_validate_rmsd_angle.auth_comp_id_3 _pdbx_validate_rmsd_angle.auth_seq_id_3 _pdbx_validate_rmsd_angle.PDB_ins_code_3 _pdbx_validate_rmsd_angle.label_alt_id_3 _pdbx_validate_rmsd_angle.angle_value _pdbx_validate_rmsd_angle.angle_target_value _pdbx_validate_rmsd_angle.angle_deviation _pdbx_validate_rmsd_angle.angle_standard_deviation _pdbx_validate_rmsd_angle.linker_flag 1 1 CA A GLN 10 ? ? CB A GLN 10 ? ? CG A GLN 10 ? ? 126.93 113.40 13.53 2.20 N 2 1 CB A ASP 31 ? ? CG A ASP 31 ? ? OD2 A ASP 31 ? ? 112.48 118.30 -5.82 0.90 N 3 1 NE A ARG 33 ? ? CZ A ARG 33 ? ? NH1 A ARG 33 ? ? 125.36 120.30 5.06 0.50 N 4 1 NE A ARG 33 ? ? CZ A ARG 33 ? ? NH2 A ARG 33 ? ? 117.06 120.30 -3.24 0.50 N # 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 SER A 8 ? ? 33.90 -110.65 2 1 VAL A 59 ? ? 32.54 52.62 3 1 ASN A 61 ? ? -97.27 35.18 # loop_ _pdbx_entity_nonpoly.entity_id _pdbx_entity_nonpoly.name _pdbx_entity_nonpoly.comp_id 2 'SULFATE ION' SO4 3 water HOH #