Atom Nomenclature for DAE

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 DAE

Atom Name (V3) Atom Name (V2)
BE BE
F1 F1
F2 F2
F3 F3
PB PB
OB1 OB1
OB2 OB2
OB3 OB3
OA3 OA3
PA PA
OA1 OA1
OA2 OA2
OE2 OE2
NA3 NA3
CA2 CA2
CA1 CA1
C1 C1
C6 C6
C5 C5
C4 C4
C3 C3
C2 C2
N4 N4
O4A O4A
O4B O4B
N2 N2
O2A O2A
O2B O2B
HOB2 2HOB
HOA2 2HOA
HNA1 1HNA
HA21 1HA2
HA22 2HA2
HA11 1HA1
HA12 2HA1
H6 H6
H5 H5
H3 H3