Atom Nomenclature for ABB

The atom nomenclature in PDB data files was revised with the release of data in the PDB Format Version 3.0. These changes make the PDB atom names used by PDB compliant with existing IUPAC nomenclature for standard amino acid and nucleotides (Pure & Appl. Chem., 70, 117-142, 1998) with the exception of the well established convention for C-terminal atoms OXT and HXT. A small number of additional changes were introduced in Version 3 to make atom labeling more conventional. The following chemical diagrams and tables provide the correspondences between atom names used in Version 3 and Version 2 PDB formats.

Labeled Chemical Diagrams

Chemical diagram with format V3 atom labels (heavy atoms)
Chemical diagram with format V3 atom labels (all atoms)
Chemical diagram with format V2 atom labels (heavy atoms)
Chemical diagram with format V2 atom labels (all atoms)

Atom Name Correspondences for ABB

Atom Name (V3) Atom Name (V2)
N1 N1
C54 C54
C53 C53
C52 C52
C51 C51
CP CP
OP OP
N N
CA CA
CB CB
CG CG
CD CD
NE NE
CZ CZ
NH1 NH1
NH2 NH2
O O
N5 N5
C5 C5
S5 S5
C61 C61
C62 C62
C63 C63
C64 C64
C65 C65
C66 C66
O1 O1
C1 C1
C2 C2
O2 O2
C C
H541 1H54
H542 2H54
HC53 HC53
H521 1H52
H522 2H52
HC51 HC51
H H
HCA HCA
HCB1 1HCB
HCB2 2HCB
HCG1 1HCG
HCG2 2HCG
HCD1 1HCD
HCD2 2HCD
HNE HNE
HH1 HH1
HH21 1HH2
HH22 2HH2
HC63 HC63
HC64 HC64
HC65 HC65
HC66 HC66
HO1 HO1
HC21 1HC2
HC22 2HC2
HC23 3HC2