data_BTC
# 
_chem_comp.id                                    BTC 
_chem_comp.name                                  CYSTEINE 
_chem_comp.type                                  "L-PEPTIDE LINKING" 
_chem_comp.pdbx_type                             ATOMP 
_chem_comp.formula                               "C3 H7 N O2 S" 
_chem_comp.mon_nstd_parent_comp_id               CYS 
_chem_comp.pdbx_synonyms                         "BIS-TRIS BUFFER" 
_chem_comp.pdbx_formal_charge                    0 
_chem_comp.pdbx_initial_date                     1999-07-08 
_chem_comp.pdbx_modified_date                    2009-01-07 
_chem_comp.pdbx_ambiguous_flag                   N 
_chem_comp.pdbx_release_status                   OBS 
_chem_comp.pdbx_replaced_by                      CYS 
_chem_comp.pdbx_replaces                         ? 
_chem_comp.formula_weight                        121.158 
_chem_comp.one_letter_code                       C 
_chem_comp.three_letter_code                     BTC 
_chem_comp.pdbx_model_coordinates_details        ? 
_chem_comp.pdbx_model_coordinates_missing_flag   N 
_chem_comp.pdbx_ideal_coordinates_details        ? 
_chem_comp.pdbx_ideal_coordinates_missing_flag   N 
_chem_comp.pdbx_model_coordinates_db_code        1ZNM 
_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.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 
BTC N   N   N 0 1 N N N 17.060 11.199 4.120 1.585  0.483  -0.081 N   BTC 1  
BTC CA  CA  C 0 1 N N R 16.531 11.741 2.828 0.141  0.450  0.186  CA  BTC 2  
BTC CB  CB  C 0 1 N N N 16.829 13.240 2.862 -0.533 -0.530 -0.774 CB  BTC 3  
BTC SG  SG  S 0 1 N N N 18.254 13.497 3.927 -0.247 0.004  -2.484 SG  BTC 4  
BTC C   C   C 0 1 N N N 17.264 11.068 1.665 -0.095 0.006  1.606  C   BTC 5  
BTC O   O   O 0 1 N N N 17.014 11.350 0.510 0.685  -0.742 2.143  O   BTC 6  
BTC OXT OXT O 0 1 N Y N 18.163 10.165 1.968 -1.174 0.443  2.275  OXT BTC 7  
BTC H   1HN H 0 1 N N N 16.861 10.198 4.097 1.693  0.682  -1.065 H   BTC 8  
BTC H2  2HN H 0 1 N Y N 16.691 11.672 4.945 1.928  -0.454 0.063  H2  BTC 9  
BTC HA  HA  H 0 1 N N N 15.468 11.573 2.754 -0.277 1.446  0.042  HA  BTC 10 
BTC HB2 1HB H 0 1 N N N 15.978 13.773 3.258 -0.114 -1.526 -0.630 HB2 BTC 11 
BTC HB3 2HB H 0 1 N N N 17.049 13.591 1.864 -1.604 -0.554 -0.575 HB3 BTC 12 
BTC HG  HSG H 0 1 N N N 18.439 14.428 3.948 -0.904 -0.965 -3.145 HG  BTC 13 
BTC HXT HXT H 0 1 N Y N 18.617 9.747  1.246 -1.326 0.158  3.186  HXT BTC 14 
# 
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 
BTC N   CA  SING N N 1  
BTC N   H   SING N N 2  
BTC N   H2  SING N N 3  
BTC CA  CB  SING N N 4  
BTC CA  C   SING N N 5  
BTC CA  HA  SING N N 6  
BTC CB  SG  SING N N 7  
BTC CB  HB2 SING N N 8  
BTC CB  HB3 SING N N 9  
BTC SG  HG  SING N N 10 
BTC C   O   DOUB N N 11 
BTC C   OXT SING N N 12 
BTC OXT HXT SING N N 13 
# 
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 
BTC SMILES           ACDLabs              10.04 "O=C(O)C(N)CS"                                                        
BTC InChI            InChI                1.02b "InChI=1/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1/f/h5H" 
BTC InChIKey         InChI                1.02b XUJNEKJLAYXESH-SNQCPAJUDK                                             
BTC SMILES_CANONICAL CACTVS               3.341 "N[C@@H](CS)C(O)=O"                                                   
BTC SMILES           CACTVS               3.341 "N[CH](CS)C(O)=O"                                                     
BTC SMILES_CANONICAL "OpenEye OEToolkits" 1.5.0 "C([C@@H](C(=O)O)N)S"                                                 
BTC SMILES           "OpenEye OEToolkits" 1.5.0 "C(C(C(=O)O)N)S"                                                      
# 
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 
BTC "SYSTEMATIC NAME" ACDLabs              10.04 L-cysteine                               
BTC "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.5.0 "(2R)-2-amino-3-sulfanyl-propanoic 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 
BTC "Create component" 1999-07-08 RCSB 
# 
