data_CSU
# 
_chem_comp.id                                    CSU 
_chem_comp.name                                  "CYSTEINE-S-SULFONIC ACID" 
_chem_comp.type                                  "L-PEPTIDE LINKING" 
_chem_comp.pdbx_type                             ATOMP 
_chem_comp.formula                               "C3 H7 N O5 S2" 
_chem_comp.mon_nstd_parent_comp_id               CYS 
_chem_comp.pdbx_synonyms                         ? 
_chem_comp.pdbx_formal_charge                    0 
_chem_comp.pdbx_initial_date                     2000-08-22 
_chem_comp.pdbx_modified_date                    2024-09-27 
_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                        201.221 
_chem_comp.one_letter_code                       C 
_chem_comp.three_letter_code                     CSU 
_chem_comp.pdbx_model_coordinates_details        ? 
_chem_comp.pdbx_model_coordinates_missing_flag   Y 
_chem_comp.pdbx_ideal_coordinates_details        ? 
_chem_comp.pdbx_ideal_coordinates_missing_flag   N 
_chem_comp.pdbx_model_coordinates_db_code        ? 
_chem_comp.pdbx_subcomponent_list                ? 
_chem_comp.pdbx_processing_site                  RCSB 
_chem_comp.pdbx_pcm                              Y 
# 
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 
CSU N   N   N 0 1 N N N Y Y N -3.100 -11.328 -7.108 3.035  -1.472 -0.440 N   CSU 1  
CSU CA  CA  C 0 1 N N R Y N N -3.550 -10.806 -5.825 1.665  -1.164 -0.766 CA  CSU 2  
CSU CB  CB  C 0 1 N N N N N N -3.869 -11.955 -4.866 1.076  -0.107 0.172  CB  CSU 3  
CSU SG  SG  S 0 1 N N N N N N -4.358 -11.244 -3.276 1.832  1.542  -0.014 SG  CSU 4  
CSU S   S   S 0 1 N N N N N N -4.705 -12.988 -2.293 0.781  2.669  1.403  S   CSU 5  
CSU C   C   C 0 1 N N N Y N Y -2.518 -9.855  -5.215 1.500  -0.794 -2.231 C   CSU 6  
CSU O   O   O 0 1 N N N Y N Y -2.843 -8.710  -4.897 2.436  -0.664 -3.010 O   CSU 7  
CSU OXT OXT O 0 1 N Y N Y N Y ?      ?       ?      0.208  -0.605 -2.593 OXT CSU 8  
CSU OD1 OD1 O 0 1 N N N N N N -5.876 -13.636 -2.856 -0.600 2.740  0.967  OD1 CSU 9  
CSU OD2 OD2 O 0 1 N N N N N N -3.452 -13.703 -2.142 1.424  4.162  1.274  OD2 CSU 10 
CSU OD3 OD3 O 0 1 N N N N N N -5.070 -12.442 -0.940 1.121  2.148  2.713  OD3 CSU 11 
CSU H   1HN H 0 1 N N N Y Y N -2.455 -10.685 -7.522 3.758  -1.236 -1.098 H   CSU 12 
CSU H2  2HN H 0 1 N Y N Y Y N -3.886 -11.448 -7.714 3.225  -2.090 0.331  H2  CSU 13 
CSU HA  HA  H 0 1 N N N Y N N -4.470 -10.227 -5.996 1.117  -2.104 -0.627 HA  CSU 14 
CSU HB2 1HB H 0 1 N N N N N N -2.986 -12.599 -4.738 1.217  -0.414 1.214  HB2 CSU 15 
CSU HB3 2HB H 0 1 N N N N N N -4.690 -12.565 -5.272 0.000  0.000  0.000  HB3 CSU 16 
CSU HXT HXT H 0 1 N Y N Y N Y 0.641  0.590   0.379  0.125  -0.356 -3.538 HXT CSU 17 
CSU HD2 HD2 H 0 1 N N N N N N -2.734 -13.082 -2.109 2.394  4.220  1.447  HD2 CSU 18 
# 
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 
CSU N   CA  SING N N 1  
CSU N   H   SING N N 2  
CSU N   H2  SING N N 3  
CSU CA  CB  SING N N 4  
CSU CA  C   SING N N 5  
CSU CA  HA  SING N N 6  
CSU CB  SG  SING N N 7  
CSU CB  HB2 SING N N 8  
CSU CB  HB3 SING N N 9  
CSU SG  S   SING N N 10 
CSU S   OD1 DOUB N N 11 
CSU S   OD2 SING N N 12 
CSU S   OD3 DOUB N N 13 
CSU C   O   DOUB N N 14 
CSU C   OXT SING N N 15 
CSU OXT HXT SING N N 16 
CSU OD2 HD2 SING N N 17 
# 
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 
CSU SMILES           ACDLabs              10.04 "O=S(=O)(O)SCC(C(=O)O)N"                                                           
CSU SMILES_CANONICAL CACTVS               3.341 "N[C@@H](CS[S](O)(=O)=O)C(O)=O"                                                    
CSU SMILES           CACTVS               3.341 "N[CH](CS[S](O)(=O)=O)C(O)=O"                                                      
CSU SMILES_CANONICAL "OpenEye OEToolkits" 1.5.0 "C([C@@H](C(=O)O)N)SS(=O)(=O)O"                                                    
CSU SMILES           "OpenEye OEToolkits" 1.5.0 "C(C(C(=O)O)N)SS(=O)(=O)O"                                                         
CSU InChI            InChI                1.03  "InChI=1S/C3H7NO5S2/c4-2(3(5)6)1-10-11(7,8)9/h2H,1,4H2,(H,5,6)(H,7,8,9)/t2-/m0/s1" 
CSU InChIKey         InChI                1.03  NOKPBJYHPHHWAN-REOHCLBHSA-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 
CSU "SYSTEMATIC NAME" ACDLabs              10.04 "3-(sulfosulfanyl)-L-alanine"                 
CSU "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.5.0 "(2R)-2-amino-3-sulfosulfanyl-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 
CSU "Create component"  2000-08-22 RCSB 
CSU "Modify descriptor" 2011-06-04 RCSB 
CSU "Modify backbone"   2023-11-03 PDBE 
CSU "Modify PCM"        2024-09-27 PDBE 
# 
_pdbx_chem_comp_pcm.pcm_id                             1 
_pdbx_chem_comp_pcm.comp_id                            CSU 
_pdbx_chem_comp_pcm.modified_residue_id                CYS 
_pdbx_chem_comp_pcm.type                               Sulfation 
_pdbx_chem_comp_pcm.category                           "Named protein modification" 
_pdbx_chem_comp_pcm.position                           "Amino-acid side chain" 
_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      ? 
# 
