data_B3U
# 
_chem_comp.id                                    B3U 
_chem_comp.name                                  2-amino-L-histidine 
_chem_comp.type                                  "L-peptide linking" 
_chem_comp.pdbx_type                             ATOMP 
_chem_comp.formula                               "C6 H10 N4 O2" 
_chem_comp.mon_nstd_parent_comp_id               HIS 
_chem_comp.pdbx_synonyms                         ? 
_chem_comp.pdbx_formal_charge                    0 
_chem_comp.pdbx_initial_date                     2007-11-07 
_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                        170.169 
_chem_comp.one_letter_code                       H 
_chem_comp.three_letter_code                     B3U 
_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        3B3U 
_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.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 
B3U N    N    N 0 1 N N N Y Y N 4.906  25.474 31.204 -1.349 1.472  -0.798 N    B3U 1  
B3U CA   CA   C 0 1 N N S Y N N 4.909  25.579 29.738 -1.438 0.060  -0.405 CA   B3U 2  
B3U CB   CB   C 0 1 N N N N N N 4.485  24.313 29.035 -0.573 -0.180 0.834  CB   B3U 3  
B3U CG   CG   C 0 1 Y N N N N N 3.036  24.028 29.185 0.876  0.047  0.486  CG   B3U 4  
B3U CD2  CD2  C 0 1 Y N N N N N 2.119  24.301 30.139 1.523  1.225  0.483  CD2  B3U 5  
B3U NE2  NE2  N 0 1 Y N N N N N 0.948  23.768 29.688 2.797  1.006  0.118  NE2  B3U 6  
B3U CE1  CE1  C 0 1 Y N N N N N 1.128  23.198 28.512 2.970  -0.275 -0.108 CE1  B3U 7  
B3U ND1  ND1  N 0 1 Y N N N N N 2.396  23.337 28.179 1.791  -0.914 0.117  ND1  B3U 8  
B3U NT   NT   N 0 1 N N N N N N 0.192  22.525 27.679 4.154  -0.875 -0.503 NT   B3U 9  
B3U C    C    C 0 1 N N N Y N Y 4.078  26.812 29.345 -2.871 -0.285 -0.091 C    B3U 10 
B3U OXT  OXT  O 0 1 N Y N Y N Y 3.696  27.496 30.312 -3.270 -1.567 -0.102 O1   B3U 11 
B3U O    O    O 0 1 N N N Y N Y 3.801  27.103 28.178 -3.660 0.591  0.170  O2   B3U 12 
B3U H    H    H 0 1 N N N Y Y N 5.196  26.345 31.602 -1.861 1.643  -1.651 HN   B3U 13 
B3U H2   H2   H 0 1 N Y N Y Y N 3.983  25.254 31.520 -1.673 2.075  -0.056 HNA  B3U 14 
B3U HA   HA   H 0 1 N N N Y N N 5.944  25.716 29.391 -1.084 -0.568 -1.223 HA   B3U 15 
B3U HB   HB   H 0 1 N N N N N N 4.708  24.421 27.963 -0.869 0.510  1.623  HB   B3U 16 
B3U HBA  HBA  H 0 1 N N N N N N 5.050  23.472 29.464 -0.707 -1.206 1.178  HBA  B3U 17 
B3U HD2  HD2  H 0 1 N N N N N N 2.280  24.831 31.066 1.092  2.184  0.731  HD2  B3U 18 
B3U HND1 HND1 H 0 0 N N N N N N 2.821  22.999 27.339 1.625  -1.866 0.032  HND1 B3U 19 
B3U HNT  HNT  H 0 1 N N N N N N -0.707 22.527 28.117 4.950  -0.337 -0.636 HNT  B3U 20 
B3U HNTA HNTA H 0 0 N N N N N N 0.134  22.993 26.797 4.187  -1.834 -0.648 HNTA B3U 21 
B3U HXT  HXT  H 0 1 N Y N Y N Y 3.186  28.233 29.997 -4.199 -1.739 0.106  H10  B3U 22 
# 
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 
B3U N   CA   SING N N 1  
B3U N   H    SING N N 2  
B3U N   H2   SING N N 3  
B3U CA  CB   SING N N 4  
B3U CA  C    SING N N 5  
B3U CA  HA   SING N N 6  
B3U CB  CG   SING N N 7  
B3U CB  HB   SING N N 8  
B3U CB  HBA  SING N N 9  
B3U CG  CD2  DOUB Y N 10 
B3U CG  ND1  SING Y N 11 
B3U CD2 NE2  SING Y N 12 
B3U CD2 HD2  SING N N 13 
B3U NE2 CE1  DOUB Y N 14 
B3U CE1 ND1  SING Y N 15 
B3U CE1 NT   SING N N 16 
B3U ND1 HND1 SING N N 17 
B3U NT  HNT  SING N N 18 
B3U NT  HNTA SING N N 19 
B3U C   OXT  SING N N 20 
B3U C   O    DOUB N N 21 
B3U OXT HXT  SING N N 22 
# 
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 
B3U SMILES           ACDLabs              12.01 "O=C(O)C(N)Cc1cnc(N)n1"                                                                       
B3U SMILES_CANONICAL CACTVS               3.370 "N[C@@H](Cc1[nH]c(N)nc1)C(O)=O"                                                               
B3U SMILES           CACTVS               3.370 "N[CH](Cc1[nH]c(N)nc1)C(O)=O"                                                                 
B3U SMILES_CANONICAL "OpenEye OEToolkits" 1.7.0 "c1c([nH]c(n1)N)C[C@@H](C(=O)O)N"                                                             
B3U SMILES           "OpenEye OEToolkits" 1.7.0 "c1c([nH]c(n1)N)CC(C(=O)O)N"                                                                  
B3U InChI            InChI                1.03  "InChI=1S/C6H10N4O2/c7-4(5(11)12)1-3-2-9-6(8)10-3/h2,4H,1,7H2,(H,11,12)(H3,8,9,10)/t4-/m0/s1" 
B3U InChIKey         InChI                1.03  UYEGXSNFZXWSDV-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 
B3U "SYSTEMATIC NAME" ACDLabs              12.01 2-amino-L-histidine                                         
B3U "SYSTEMATIC NAME" "OpenEye OEToolkits" 1.7.0 "(2S)-2-azanyl-3-(2-azanyl-1H-imidazol-5-yl)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 
B3U "Create component"  2007-11-07 RCSB 
B3U "Modify descriptor" 2011-06-04 RCSB 
B3U "Modify backbone"   2023-11-03 PDBE 
# 
