data_CSK
# 
_chem_comp.id                                    CSK 
_chem_comp.name                                  "S-(methylselanyl)-L-cysteine" 
_chem_comp.type                                  "L-PEPTIDE LINKING" 
_chem_comp.pdbx_type                             ATOMP 
_chem_comp.formula                               "C4 H9 N O2 S Se" 
_chem_comp.mon_nstd_parent_comp_id               ? 
_chem_comp.pdbx_synonyms                         ? 
_chem_comp.pdbx_formal_charge                    0 
_chem_comp.pdbx_initial_date                     2012-01-30 
_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                        214.145 
_chem_comp.one_letter_code                       ? 
_chem_comp.three_letter_code                     CSK 
_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        4AGI 
_chem_comp.pdbx_subcomponent_list                ? 
_chem_comp.pdbx_processing_site                  EBI 
# 
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 
CSK N    N    N  0 1 N N N Y Y N 36.004 60.151 54.894 0.957  1.068  0.760  N    CSK 1  
CSK CA   CA   C  0 1 N N R Y N N 34.869 60.894 55.377 1.729  -0.158 0.518  CA   CSK 2  
CSK C    C    C  0 1 N N N Y N Y 34.959 62.285 54.779 3.107  0.204  0.028  C    CSK 3  
CSK O    O    O  0 1 N N N Y N Y 35.735 62.604 53.859 3.312  1.295  -0.448 O    CSK 4  
CSK CB   CB   C  0 1 N N N N N N 34.960 60.945 56.880 1.019  -1.008 -0.538 CB   CSK 5  
CSK SG   SG   S  0 1 N N N N N N 34.734 59.296 57.625 -0.641 -1.443 0.052  SG   CSK 6  
CSK SE   SE   SE 0 0 N N N N N N 32.818 58.885 57.459 -1.765 0.444  -0.189 SE   CSK 7  
CSK CM   CM   C  0 1 N N N N N N 32.955 57.521 56.091 -3.536 -0.090 0.461  CM   CSK 8  
CSK OXT  OXT  O  0 1 N Y N Y N Y 33.730 63.014 55.104 4.107  -0.687 0.120  OXT  CSK 9  
CSK H    HN1  H  0 1 N N N Y Y N 35.980 59.224 55.268 1.371  1.616  1.499  HN1  CSK 10 
CSK H2   HN2  H  0 1 N Y N Y Y N 35.974 60.108 53.895 0.868  1.612  -0.086 HN2  CSK 11 
CSK HA   HA   H  0 1 N N N Y N N 33.926 60.416 55.073 1.810  -0.725 1.445  HA   CSK 12 
CSK HB1C HB1C H  0 0 N N N N N N 35.950 61.332 57.164 0.937  -0.441 -1.466 HB1C CSK 13 
CSK HB2C HB2C H  0 0 N N N N N N 34.179 61.619 57.262 1.591  -1.918 -0.718 HB2C CSK 14 
CSK HXT  HXT  H  0 1 N Y N Y N Y 33.631 63.749 54.510 4.974  -0.409 -0.208 HXT  CSK 15 
CSK HM1C HM1C H  0 0 N N N N N N 31.951 57.145 55.845 -3.917 -0.905 -0.154 HM1C CSK 16 
CSK HM2C HM2C H  0 0 N N N N N N 33.416 57.951 55.190 -3.458 -0.421 1.496  HM2C CSK 17 
CSK HM3C HM3C H  0 0 N N N N N N 33.576 56.692 56.461 -4.216 0.759  0.401  HM3C CSK 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 
CSK N   CA   SING N N 1  
CSK CA  C    SING N N 2  
CSK CA  CB   SING N N 3  
CSK C   O    DOUB N N 4  
CSK C   OXT  SING N N 5  
CSK CB  SG   SING N N 6  
CSK SG  SE   SING N N 7  
CSK SE  CM   SING N N 8  
CSK N   H    SING N N 9  
CSK N   H2   SING N N 10 
CSK CA  HA   SING N N 11 
CSK CB  HB1C SING N N 12 
CSK CB  HB2C SING N N 13 
CSK OXT HXT  SING N N 14 
CSK CM  HM1C SING N N 15 
CSK CM  HM2C SING N N 16 
CSK CM  HM3C 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 
CSK SMILES           ACDLabs              12.01 "O=C(O)C(N)CS[Se]C"                                                      
CSK InChI            InChI                1.03  "InChI=1S/C4H9NO2SSe/c1-9-8-2-3(5)4(6)7/h3H,2,5H2,1H3,(H,6,7)/t3-/m0/s1" 
CSK InChIKey         InChI                1.03  ZDHAKDUTQCFEKA-VKHMYHEASA-N                                              
CSK SMILES_CANONICAL CACTVS               3.370 "C[Se]SC[C@H](N)C(O)=O"                                                  
CSK SMILES           CACTVS               3.370 "C[Se]SC[CH](N)C(O)=O"                                                   
CSK SMILES_CANONICAL "OpenEye OEToolkits" 1.7.6 "C[Se]SC[C@@H](C(=O)O)N"                                                 
CSK SMILES           "OpenEye OEToolkits" 1.7.6 "C[Se]SCC(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 
CSK "SYSTEMATIC NAME" ACDLabs              12.01 "S-(methylselanyl)-L-cysteine"                         
CSK "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.7.6 "(2R)-2-azanyl-3-methylselanylsulfanyl-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 
CSK "Create component"   2012-01-30 EBI  
CSK "Initial release"    2013-02-01 RCSB 
CSK "Other modification" 2014-05-23 EBI  
CSK "Modify backbone"    2023-11-03 PDBE 
# 
