Atom Nomenclature for NPW

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 NPW

Atom Name (V3) Atom Name (V2)
P P
O1 O1
O2 O2
O3 O3
PA PA
PB PB
C1A C1A
C1B C1B
N1C N1C
N1D N1D
C2A C2A
O2A O2A
C2B C2B
O2B O2B
C2C C2C
C2D C2D
C3A C3A
O3A O3A
C3B C3B
O3B O3B
C3C C3C
N3D N3D
C4B C4B
O4B O4B
C4C C4C
C4D C4D
O4D O4D
C4E C4E
C5A C5A
C5B C5B
O5B O5B
C5C C5C
C5E C5E
O5E O5E
C6C C6C
O6C O6C
C6D C6D
N6D N6D
N7A N7A
C7C C7C
N7C N7C
O7C O7C
C8A C8A
N9A N9A
OA1 OA1
OA2 OA2
OA3 OA3
OB1 OB1
OB2 OB2
HO1 HO1
HO3 HO3
H1A H1A
H1B H1B
H2A H2A
H2B H2B
HO2B HO2B
H2C H2C
H2D H2D
H3A H3A
HO3A HO3A
H3B H3B
HO3B HO3B
H4B H4B
H4C H4C
H4CA H4CA
H4E H4E
H5B H5B
H5BA H5BA
H5C H5C
H5CA H5CA
H5E H5E
H5EA H5EA
H6C H6C
HO6C HO6C
HN6D HN6D
HN6A HN6A
HN7C HN7C
HN7A HN7A
H8A H8A
HOA1 HOA1
HOB2 HOB2