data_ECX
# 
_chem_comp.id                                    ECX 
_chem_comp.name                                  S-ethyl-L-cysteine 
_chem_comp.type                                  "L-PEPTIDE LINKING" 
_chem_comp.pdbx_type                             ATOMP 
_chem_comp.formula                               "C5 H11 N O2 S" 
_chem_comp.mon_nstd_parent_comp_id               CYS 
_chem_comp.pdbx_synonyms                         ? 
_chem_comp.pdbx_formal_charge                    0 
_chem_comp.pdbx_initial_date                     2009-09-28 
_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                        149.211 
_chem_comp.one_letter_code                       ? 
_chem_comp.three_letter_code                     ECX 
_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        3JW9 
_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 
ECX C   C   C 0 1 N N N Y N Y 10.848 17.337 13.952 -2.402 0.258  -0.030 C   ECX 1  
ECX N   N   N 0 1 N N N Y Y N 9.458  17.301 11.903 -1.044 -1.752 0.122  N   ECX 2  
ECX O   O   O 0 1 N N N Y N Y 11.953 17.832 14.266 -3.033 -0.311 -0.889 O   ECX 3  
ECX CA  CA  C 0 1 N N R Y N N 10.668 16.772 12.527 -1.099 -0.323 0.458  CA  ECX 4  
ECX CB  CB  C 0 1 N N N N N N 11.821 17.025 11.526 0.067  0.404  -0.215 CB  ECX 5  
ECX SC  SC  S 0 1 N N N N N N 12.076 18.765 11.037 1.635  -0.294 0.371  SC  ECX 6  
ECX CD  CD  C 0 1 N N N N N N 13.078 18.521 9.518  2.876  0.680  -0.524 CD  ECX 7  
ECX CE  CE  C 0 1 N N N N N N 13.294 19.844 8.776  4.276  0.205  -0.132 CE  ECX 8  
ECX OXT OXT O 0 1 N Y N Y N Y 9.864  17.244 14.721 -2.859 1.409  0.487  OXT ECX 9  
ECX H   H   H 0 1 N N N Y Y N 9.364  16.921 10.983 -1.766 -2.265 0.606  H   ECX 10 
ECX H2  H2  H 0 1 N Y N Y Y N 8.662  17.047 12.452 -1.108 -1.892 -0.875 H2  ECX 11 
ECX HA  HA  H 0 1 N N N Y N N 10.628 15.688 12.710 -1.029 -0.200 1.538  HA  ECX 12 
ECX HB2 HB2 H 0 1 N N N N N N 12.751 16.675 11.998 -0.004 0.282  -1.296 HB2 ECX 13 
ECX HB3 HB3 H 0 1 N N N N N N 11.596 16.455 10.612 0.026  1.465  0.034  HB3 ECX 14 
ECX HD  HD  H 0 1 N N N N N N 14.057 18.107 9.800  2.735  0.551  -1.597 HD  ECX 15 
ECX HDA HDA H 0 1 N N N N N N 12.551 17.822 8.852  2.764  1.734  -0.267 HDA ECX 16 
ECX HE  HE  H 0 1 N N N N N N 13.896 19.665 7.873  4.417  0.334  0.941  HE  ECX 17 
ECX HEA HEA H 0 1 N N N N N N 12.320 20.266 8.489  4.387  -0.848 -0.389 HEA ECX 18 
ECX HEB HEB H 0 1 N N N N N N 13.821 20.551 9.433  5.022  0.791  -0.670 HEB ECX 19 
ECX HXT HXT H 0 1 N Y N Y N Y 10.090 17.605 15.570 -3.697 1.744  0.140  HXT ECX 20 
# 
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 
ECX C   O   DOUB N N 1  
ECX C   CA  SING N N 2  
ECX C   OXT SING N N 3  
ECX N   CA  SING N N 4  
ECX N   H   SING N N 5  
ECX N   H2  SING N N 6  
ECX CA  CB  SING N N 7  
ECX CA  HA  SING N N 8  
ECX CB  SC  SING N N 9  
ECX CB  HB2 SING N N 10 
ECX CB  HB3 SING N N 11 
ECX SC  CD  SING N N 12 
ECX CD  CE  SING N N 13 
ECX CD  HD  SING N N 14 
ECX CD  HDA SING N N 15 
ECX CE  HE  SING N N 16 
ECX CE  HEA SING N N 17 
ECX CE  HEB SING N N 18 
ECX OXT HXT SING N N 19 
# 
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 
ECX SMILES           ACDLabs              11.02 "O=C(O)C(N)CSCC"                                                          
ECX SMILES_CANONICAL CACTVS               3.352 "CCSC[C@H](N)C(O)=O"                                                      
ECX SMILES           CACTVS               3.352 "CCSC[CH](N)C(O)=O"                                                       
ECX SMILES_CANONICAL "OpenEye OEToolkits" 1.7.0 "CCSC[C@@H](C(=O)O)N"                                                     
ECX SMILES           "OpenEye OEToolkits" 1.7.0 "CCSCC(C(=O)O)N"                                                          
ECX InChI            InChI                1.03  "InChI=1S/C5H11NO2S/c1-2-9-3-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)/t4-/m0/s1" 
ECX InChIKey         InChI                1.03  ULXKXLZEOGLCRJ-BYPYZUCNSA-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 
ECX "SYSTEMATIC NAME" ACDLabs              11.02 S-ethyl-L-cysteine                             
ECX "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.6.1 "(2R)-2-azanyl-3-ethylsulfanyl-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 
ECX "Create component"  2009-09-28 RCSB 
ECX "Modify descriptor" 2011-06-04 RCSB 
ECX "Modify backbone"   2023-11-03 PDBE 
ECX "Modify PCM"        2024-09-27 PDBE 
# 
_pdbx_chem_comp_pcm.pcm_id                             1 
_pdbx_chem_comp_pcm.comp_id                            ECX 
_pdbx_chem_comp_pcm.modified_residue_id                CYS 
_pdbx_chem_comp_pcm.type                               Ethylation 
_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      ? 
# 
