data_KCY
# 
_chem_comp.id                                    KCY 
_chem_comp.name                                  D-homocysteine 
_chem_comp.type                                  "D-PEPTIDE LINKING" 
_chem_comp.pdbx_type                             ATOMP 
_chem_comp.formula                               "C4 H9 N O2 S" 
_chem_comp.mon_nstd_parent_comp_id               ? 
_chem_comp.pdbx_synonyms                         ? 
_chem_comp.pdbx_formal_charge                    0 
_chem_comp.pdbx_initial_date                     2015-03-10 
_chem_comp.pdbx_modified_date                    2023-11-03 
_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                        135.185 
_chem_comp.one_letter_code                       ? 
_chem_comp.three_letter_code                     KCY 
_chem_comp.pdbx_model_coordinates_details        ? 
_chem_comp.pdbx_model_coordinates_missing_flag   N 
_chem_comp.pdbx_ideal_coordinates_details        Corina 
_chem_comp.pdbx_ideal_coordinates_missing_flag   N 
_chem_comp.pdbx_model_coordinates_db_code        2N0I 
_chem_comp.pdbx_subcomponent_list                ? 
_chem_comp.pdbx_processing_site                  RCSB 
# 
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_backbone_atom_flag 
_chem_comp_atom.pdbx_n_terminal_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 
KCY C   C   C 0 1 N N N Y N Y 0.736  18.924 4.096 2.048  -0.285 0.033  C   KCY 1  
KCY N   N   N 0 1 N N N Y Y N 2.441  18.775 5.871 0.862  1.823  -0.201 N   KCY 2  
KCY O   O   O 0 1 N N N Y N Y -0.465 18.646 4.052 2.694  0.249  0.903  O   KCY 3  
KCY CA  CA  C 0 1 N N R Y N N 1.712  18.017 4.845 0.813  0.387  -0.509 CA  KCY 4  
KCY CB  CB  C 0 1 N N N N N N 2.682  17.352 3.860 -0.429 -0.231 0.137  CB  KCY 5  
KCY SD  SD  S 0 1 N N N N N N 2.551  15.674 1.632 -3.158 -0.371 0.263  SD  KCY 6  
KCY CG  CG  C 0 1 N N N N N N 2.232  15.975 3.401 -1.685 0.362  -0.503 CG  KCY 7  
KCY OXT OXT O 0 1 N Y N Y N Y 1.254  20.014 3.528 2.434  -1.474 -0.455 OXT KCY 8  
KCY H   HN  H 0 1 N N N Y Y N 3.074  18.166 6.350 0.904  1.978  0.795  HN  KCY 9  
KCY HA  HA  H 0 1 N N N Y N N 1.131  17.223 5.337 0.768  0.248  -1.589 HA  KCY 10 
KCY HB  HB  H 0 1 N N N N N N 3.662  17.253 4.350 -0.418 -1.311 -0.016 HB  KCY 11 
KCY HBA HBA H 0 1 N N N N N N 2.778  17.999 2.976 -0.428 -0.015 1.205  HBA KCY 12 
KCY HG  HG  H 0 1 N N N N N N 2.770  15.217 3.988 -1.696 1.442  -0.350 HG  KCY 13 
KCY HGA HGA H 0 1 N N N N N N 1.151  15.881 3.583 -1.686 0.147  -1.571 HGA KCY 14 
KCY H2  HNA H 0 1 N Y N Y Y N 2.955  19.515 5.437 1.637  2.267  -0.669 HNA KCY 15 
KCY HXT HXT H 0 1 N Y N Y N Y 0.563  20.510 3.106 3.233  -1.866 -0.076 HXT KCY 16 
KCY HSD HSD H 0 1 N N N N N N 2.095  14.467 1.477 -4.169 0.234  -0.386 HSD KCY 17 
# 
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 
KCY OXT C   SING N N 1  
KCY O   C   DOUB N N 2  
KCY C   CA  SING N N 3  
KCY CA  N   SING N N 4  
KCY N   H   SING N N 5  
KCY N   H2  SING N N 6  
KCY OXT HXT SING N N 7  
KCY CB  CA  SING N N 8  
KCY CA  HA  SING N N 9  
KCY HBA CB  SING N N 10 
KCY CG  CB  SING N N 11 
KCY CB  HB  SING N N 12 
KCY SD  CG  SING N N 13 
KCY SD  HSD SING N N 14 
KCY CG  HG  SING N N 15 
KCY CG  HGA SING N N 16 
# 
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 
KCY SMILES           ACDLabs              12.01 "C(C(N)CCS)(=O)O"                                                    
KCY InChI            InChI                1.03  "InChI=1S/C4H9NO2S/c5-3(1-2-8)4(6)7/h3,8H,1-2,5H2,(H,6,7)/t3-/m1/s1" 
KCY InChIKey         InChI                1.03  FFFHZYDWPBMWHY-GSVOUGTGSA-N                                          
KCY SMILES_CANONICAL CACTVS               3.385 "N[C@H](CCS)C(O)=O"                                                  
KCY SMILES           CACTVS               3.385 "N[CH](CCS)C(O)=O"                                                   
KCY SMILES_CANONICAL "OpenEye OEToolkits" 1.7.6 "C(CS)[C@H](C(=O)O)N"                                                
KCY SMILES           "OpenEye OEToolkits" 1.7.6 "C(CS)C(C(=O)O)N"                                                    
# 
loop_
_pdbx_chem_comp_identifier.comp_id 
_pdbx_chem_comp_identifier.type 
_pdbx_chem_comp_identifier.program 
_pdbx_chem_comp_identifier.program_version 
_pdbx_chem_comp_identifier.identifier 
KCY "SYSTEMATIC NAME" ACDLabs              12.01 D-homocysteine                           
KCY "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.7.6 "(2R)-2-azanyl-4-sulfanyl-butanoic acid" 
# 
loop_
_pdbx_chem_comp_audit.comp_id 
_pdbx_chem_comp_audit.action_type 
_pdbx_chem_comp_audit.date 
_pdbx_chem_comp_audit.processing_site 
KCY "Create component" 2015-03-10 RCSB 
KCY "Initial release"  2015-04-15 RCSB 
KCY "Modify backbone"  2023-11-03 PDBE 
# 
