data_PCA
# 
_chem_comp.id                                    PCA 
_chem_comp.name                                  "PYROGLUTAMIC ACID" 
_chem_comp.type                                  "L-PEPTIDE LINKING" 
_chem_comp.pdbx_type                             ATOMP 
_chem_comp.formula                               "C5 H7 N O3" 
_chem_comp.mon_nstd_parent_comp_id               GLN 
_chem_comp.pdbx_synonyms                         ? 
_chem_comp.pdbx_formal_charge                    0 
_chem_comp.pdbx_initial_date                     1999-07-08 
_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                         PCC 
_chem_comp.formula_weight                        129.114 
_chem_comp.one_letter_code                       Q 
_chem_comp.three_letter_code                     PCA 
_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        ? 
_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 
PCA N   N   N 0 1 N N N 38.821 57.719 67.990 0.713  0.531  -0.633 N   PCA 1  
PCA CA  CA  C 0 1 N N S 38.455 58.883 67.183 -0.328 0.539  0.400  CA  PCA 2  
PCA CB  CB  C 0 1 N N N 37.375 59.639 67.947 -1.455 -0.368 -0.140 CB  PCA 3  
PCA CG  CG  C 0 1 N N N 37.746 59.312 69.375 -1.232 -0.272 -1.667 CG  PCA 4  
PCA CD  CD  C 0 1 N N N 38.398 57.930 69.250 0.231  0.082  -1.807 CD  PCA 5  
PCA OE  OE  O 0 1 N N N 38.575 57.133 70.197 0.876  -0.019 -2.829 OE  PCA 6  
PCA C   C   C 0 1 N N N 39.640 59.813 66.967 0.214  -0.015 1.691  C   PCA 7  
PCA O   O   O 0 1 N N N 40.560 59.863 67.790 1.122  -0.812 1.672  O   PCA 8  
PCA OXT OXT O 0 1 N Y N 39.626 60.540 65.853 -0.311 0.374  2.863  OXT PCA 9  
PCA H   HN  H 0 1 N N N 39.309 56.868 67.709 1.631  0.810  -0.489 H   PCA 10 
PCA HA  HA  H 0 1 N N N 38.103 58.540 66.181 -0.700 1.552  0.552  HA  PCA 11 
PCA HB2 1HB H 0 1 N N N 37.293 60.725 67.710 -1.331 -1.393 0.208  HB2 PCA 12 
PCA HB3 2HB H 0 1 N N N 36.325 59.396 67.657 -2.435 0.019  0.136  HB3 PCA 13 
PCA HG2 1HG H 0 1 N N N 38.375 60.080 69.881 -1.439 -1.230 -2.144 HG2 PCA 14 
PCA HG3 2HG H 0 1 N N N 36.900 59.365 70.100 -1.857 0.511  -2.095 HG3 PCA 15 
PCA HXT HXT H 0 1 N Y N 40.365 61.120 65.718 0.036  0.018  3.692  HXT PCA 16 
# 
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 
PCA N   CA  SING N N 1  
PCA N   CD  SING N N 2  
PCA N   H   SING N N 3  
PCA CA  CB  SING N N 4  
PCA CA  C   SING N N 5  
PCA CA  HA  SING N N 6  
PCA CB  CG  SING N N 7  
PCA CB  HB2 SING N N 8  
PCA CB  HB3 SING N N 9  
PCA CG  CD  SING N N 10 
PCA CG  HG2 SING N N 11 
PCA CG  HG3 SING N N 12 
PCA CD  OE  DOUB N N 13 
PCA C   O   DOUB N N 14 
PCA C   OXT SING N N 15 
PCA OXT HXT 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 
PCA SMILES           ACDLabs              10.04 "O=C(O)C1NC(=O)CC1"                                                        
PCA SMILES_CANONICAL CACTVS               3.341 "OC(=O)[C@@H]1CCC(=O)N1"                                                   
PCA SMILES           CACTVS               3.341 "OC(=O)[CH]1CCC(=O)N1"                                                     
PCA SMILES_CANONICAL "OpenEye OEToolkits" 1.5.0 "C1CC(=O)N[C@@H]1C(=O)O"                                                   
PCA SMILES           "OpenEye OEToolkits" 1.5.0 "C1CC(=O)NC1C(=O)O"                                                        
PCA InChI            InChI                1.03  "InChI=1S/C5H7NO3/c7-4-2-1-3(6-4)5(8)9/h3H,1-2H2,(H,6,7)(H,8,9)/t3-/m0/s1" 
PCA InChIKey         InChI                1.03  ODHCTXKNWHHXJC-VKHMYHEASA-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 
PCA "SYSTEMATIC NAME" ACDLabs              10.04 5-oxo-L-proline                           
PCA "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.5.0 "(2S)-5-oxopyrrolidine-2-carboxylic 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 
PCA "Create component"      1999-07-08 RCSB 
PCA "Modify descriptor"     2011-06-04 RCSB 
PCA "Modify parent residue" 2019-11-14 RCSB 
PCA "Other modification"    2023-11-03 PDBE 
# 
