data_A1KD2 # _chem_comp.id A1KD2 _chem_comp.name "(2~{S})-2-[(3~{S})-3-azanyl-2-oxidanylidene-azetidin-1-yl]-4-methylsulfanyl-butanoic acid" _chem_comp.type "L-peptide linking" _chem_comp.pdbx_type ATOMP _chem_comp.formula "C8 H14 N2 O3 S" _chem_comp.mon_nstd_parent_comp_id MET _chem_comp.pdbx_synonyms ? _chem_comp.pdbx_formal_charge 0 _chem_comp.pdbx_initial_date 2026-07-15 _chem_comp.pdbx_modified_date 2026-10-09 _chem_comp.pdbx_ambiguous_flag N _chem_comp.pdbx_release_status REL _chem_comp.pdbx_replaced_by ? _chem_comp.pdbx_replaces ? _chem_comp.formula_weight 218.273 _chem_comp.one_letter_code SM _chem_comp.three_letter_code A1KD2 _chem_comp.pdbx_model_coordinates_details ? _chem_comp.pdbx_model_coordinates_missing_flag Y _chem_comp.pdbx_ideal_coordinates_details Corina _chem_comp.pdbx_ideal_coordinates_missing_flag N _chem_comp.pdbx_model_coordinates_db_code 31GM _chem_comp.pdbx_subcomponent_list ? _chem_comp.pdbx_processing_site PDBE _chem_comp.pdbx_pcm Y _chem_comp.pdbx_comp_type ? # loop_ _chem_comp_atom.comp_id _chem_comp_atom.atom_id _chem_comp_atom.alt_atom_id _chem_comp_atom.type_symbol _chem_comp_atom.charge _chem_comp_atom.pdbx_align _chem_comp_atom.pdbx_aromatic_flag _chem_comp_atom.pdbx_leaving_atom_flag _chem_comp_atom.pdbx_stereo_config _chem_comp_atom.pdbx_n_terminal_atom_flag _chem_comp_atom.pdbx_backbone_atom_flag _chem_comp_atom.pdbx_c_terminal_atom_flag _chem_comp_atom.model_Cartn_x _chem_comp_atom.model_Cartn_y _chem_comp_atom.model_Cartn_z _chem_comp_atom.pdbx_model_Cartn_x_ideal _chem_comp_atom.pdbx_model_Cartn_y_ideal _chem_comp_atom.pdbx_model_Cartn_z_ideal _chem_comp_atom.pdbx_component_atom_id _chem_comp_atom.pdbx_component_comp_id _chem_comp_atom.pdbx_ordinal A1KD2 C19 C1 C 0 1 N N S N Y N -17.521 -8.601 10.390 -1.778 2.282 -0.243 C19 A1KD2 1 A1KD2 C20 C2 C 0 1 N N N N N N -17.068 -8.516 11.861 -1.350 1.474 -1.472 C20 A1KD2 2 A1KD2 CG C3 C 0 1 N N N N N N -19.024 -6.979 15.710 1.780 -0.229 -0.464 CG A1KD2 3 A1KD2 CE C4 C 0 1 N N N N N N -18.823 -9.193 17.366 4.463 0.692 -0.361 CE A1KD2 4 A1KD2 N N1 N 0 1 N N N N Y N -18.274 -7.702 12.094 -1.099 0.412 -0.491 N A1KD2 5 A1KD2 CA C5 C 0 1 N N S N Y N -18.776 -6.916 13.201 -0.603 -0.956 -0.665 CA A1KD2 6 A1KD2 C C6 C 0 1 N N N N Y Y -18.737 -5.411 12.886 -1.635 -1.932 -0.162 C A1KD2 7 A1KD2 O O1 O 0 1 N N N N Y Y -19.753 -4.728 13.090 -2.678 -1.527 0.294 O A1KD2 8 A1KD2 CB C7 C 0 1 N N N N N N -18.115 -7.240 14.530 0.694 -1.132 0.127 CB A1KD2 9 A1KD2 SD S1 S 0 1 N N N N N N -18.279 -7.458 17.262 3.317 -0.438 0.475 SD A1KD2 10 A1KD2 CN C8 C 0 1 N N N N Y N -18.703 -7.731 10.835 -1.466 1.085 0.621 CN A1KD2 11 A1KD2 O18 O2 O 0 1 N N N N Y N -19.571 -7.130 10.288 -1.521 0.834 1.806 O18 A1KD2 12 A1KD2 N21 N2 N 0 1 N N N Y Y N -16.721 -8.003 9.302 -0.908 3.435 0.026 N21 A1KD2 13 A1KD2 H19 H1 H 0 1 N N N N Y N -17.854 -9.619 10.141 -2.836 2.546 -0.248 H19 A1KD2 14 A1KD2 H20B H2 H 0 0 N N N N N N -17.049 -9.477 12.395 -2.161 1.257 -2.167 H20B A1KD2 15 A1KD2 H20A H3 H 0 0 N N N N N N -16.116 -7.988 12.022 -0.452 1.850 -1.962 H20A A1KD2 16 A1KD2 HG3 H4 H 0 1 N N N N N N -19.256 -5.904 15.746 1.950 -0.501 -1.505 HG3 A1KD2 17 A1KD2 HG2 H5 H 0 1 N N N N N N -19.954 -7.551 15.573 1.458 0.811 -0.407 HG2 A1KD2 18 A1KD2 HE3 H6 H 0 1 N N N N N N -18.436 -9.644 18.292 4.567 0.398 -1.405 HE3 A1KD2 19 A1KD2 HE2 H7 H 0 1 N N N N N N -19.922 -9.233 17.370 4.074 1.709 -0.307 HE2 A1KD2 20 A1KD2 HE1 H8 H 0 1 N N N N N N -18.439 -9.750 16.499 5.437 0.649 0.127 HE1 A1KD2 21 A1KD2 HA H9 H 0 1 N N N N Y N -19.839 -7.172 13.319 -0.411 -1.141 -1.722 HA A1KD2 22 A1KD2 HB3 H11 H 0 1 N N N N N N -17.831 -8.303 14.532 1.016 -2.172 0.071 HB3 A1KD2 23 A1KD2 HB2 H12 H 0 1 N N N N N N -17.213 -6.619 14.636 0.524 -0.860 1.169 HB2 A1KD2 24 A1KD2 H2 H13 H 0 1 N Y N Y Y N -15.971 -8.619 9.062 -1.211 3.932 0.850 H2 A1KD2 25 A1KD2 H H14 H 0 1 N N N Y Y N -17.303 -7.858 8.501 0.056 3.148 0.110 H A1KD2 26 A1KD2 OXT O1 O 0 1 N Y N N Y Y ? ? ? -1.395 -3.251 -0.222 OXT A1KD2 27 A1KD2 HXT H1 H 0 1 N Y N N Y Y ? ? ? -2.087 -3.839 0.112 HXT A1KD2 28 # loop_ _chem_comp_bond.comp_id _chem_comp_bond.atom_id_1 _chem_comp_bond.atom_id_2 _chem_comp_bond.value_order _chem_comp_bond.pdbx_aromatic_flag _chem_comp_bond.pdbx_stereo_config _chem_comp_bond.pdbx_ordinal A1KD2 N21 C19 SING N N 1 A1KD2 O18 CN DOUB N N 2 A1KD2 C19 CN SING N N 3 A1KD2 C19 C20 SING N N 4 A1KD2 CN N SING N N 5 A1KD2 C20 N SING N N 6 A1KD2 N CA SING N N 7 A1KD2 C O DOUB N N 8 A1KD2 C CA SING N N 9 A1KD2 CA CB SING N N 10 A1KD2 CB CG SING N N 11 A1KD2 CG SD SING N N 12 A1KD2 SD CE SING N N 13 A1KD2 C19 H19 SING N N 14 A1KD2 C20 H20B SING N N 15 A1KD2 C20 H20A SING N N 16 A1KD2 CG HG3 SING N N 17 A1KD2 CG HG2 SING N N 18 A1KD2 CE HE3 SING N N 19 A1KD2 CE HE2 SING N N 20 A1KD2 CE HE1 SING N N 21 A1KD2 CA HA SING N N 22 A1KD2 CB HB3 SING N N 23 A1KD2 CB HB2 SING N N 24 A1KD2 N21 H2 SING N N 25 A1KD2 N21 H SING N N 26 A1KD2 C OXT SING N N 27 A1KD2 OXT HXT SING N N 28 # loop_ _pdbx_chem_comp_descriptor.comp_id _pdbx_chem_comp_descriptor.type _pdbx_chem_comp_descriptor.program _pdbx_chem_comp_descriptor.program_version _pdbx_chem_comp_descriptor.descriptor A1KD2 InChI InChI 1.06 "InChI=1S/C8H14N2O3S/c1-14-3-2-6(8(12)13)10-4-5(9)7(10)11/h5-6H,2-4,9H2,1H3,(H,12,13)/t5-,6-/m0/s1" A1KD2 InChIKey InChI 1.06 MHRMEOZSMMONEF-WDSKDSINSA-N A1KD2 SMILES_CANONICAL CACTVS 3.385 "CSCC[C@H](N1C[C@H](N)C1=O)C(O)=O" A1KD2 SMILES CACTVS 3.385 "CSCC[CH](N1C[CH](N)C1=O)C(O)=O" A1KD2 SMILES_CANONICAL "OpenEye OEToolkits" 2.0.7 "CSCC[C@@H](C(=O)O)N1C[C@@H](C1=O)N" A1KD2 SMILES "OpenEye OEToolkits" 2.0.7 "CSCCC(C(=O)O)N1CC(C1=O)N" # _pdbx_chem_comp_identifier.comp_id A1KD2 _pdbx_chem_comp_identifier.type "SYSTEMATIC NAME" _pdbx_chem_comp_identifier.program "OpenEye OEToolkits" _pdbx_chem_comp_identifier.program_version 2.0.7 _pdbx_chem_comp_identifier.identifier "(2~{S})-2-[(3~{S})-3-azanyl-2-oxidanylidene-azetidin-1-yl]-4-methylsulfanyl-butanoic acid" # _pdbx_chem_comp_pcm.pcm_id 1 _pdbx_chem_comp_pcm.comp_id A1KD2 _pdbx_chem_comp_pcm.modified_residue_id MET _pdbx_chem_comp_pcm.type None _pdbx_chem_comp_pcm.category "Non-standard residue" _pdbx_chem_comp_pcm.position "Amino-acid backbone" _pdbx_chem_comp_pcm.polypeptide_position "Any position" _pdbx_chem_comp_pcm.comp_id_linking_atom ? _pdbx_chem_comp_pcm.modified_residue_id_linking_atom ? _pdbx_chem_comp_pcm.uniprot_specific_ptm_accession ? _pdbx_chem_comp_pcm.uniprot_generic_ptm_accession ? # loop_ _pdbx_chem_comp_audit.comp_id _pdbx_chem_comp_audit.action_type _pdbx_chem_comp_audit.date _pdbx_chem_comp_audit.processing_site A1KD2 "Create component" 2026-07-15 PDBE A1KD2 "Modify PCM" 2026-08-06 PDBE A1KD2 "Modify internal type" 2026-08-17 PDBE A1KD2 "Modify name" 2026-08-17 PDBE A1KD2 "Modify one letter code" 2026-08-17 PDBE A1KD2 "Modify parent residue" 2026-08-17 PDBE A1KD2 "Other modification" 2026-08-17 PDBE A1KD2 "Modify PCM" 2026-08-17 PDBE A1KD2 "Modify one letter code" 2026-09-23 PDBE A1KD2 "Initial release" 2026-10-14 RCSB #