Atom Nomenclature for PAL

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 PAL

Atom Name (V3) Atom Name (V2)
P P
O1P O1P
O2P O2P
O3P O3P
C1P C1P
C1 C1
O1 O1
N2 N2
C2 C2
C4 C4
O2 O2
O3 O3
C3 C3
C5 C5
O4 O4
O5 O5
HOP2 2HOP
HOP3 3HOP
H1P1 1H1P
H1P2 2H1P
HN2 HN2
H2 H2
HO3 HO3
H31 1H3
H32 2H3
HO5 HO5