Atom Nomenclature for NDP

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 NDP

Atom Name (V3) Atom Name (V2)
PA AP
O1A AO1
O2A AO2
O5B AO5*
C5B AC5*
C4B AC4*
O4B AO4*
C3B AC3*
O3B AO3*
C2B AC2*
O2B AO2*
C1B AC1*
N9A AN9
C8A AC8
N7A AN7
C5A AC5
C6A AC6
N6A AN6
N1A AN1
C2A AC2
N3A AN3
C4A AC4
O3 O3
PN NP
O1N NO1
O2N NO2
O5D NO5*
C5D NC5*
C4D NC4*
O4D NO4*
C3D NC3*
O3D NO3*
C2D NC2*
O2D NO2*
C1D NC1*
N1N NN1
C2N NC2
C3N NC3
C7N NC7
O7N NO7
N7N NN7
C4N NC4
C5N NC5
C6N NC6
P2B AP2*
O1X AOP1
O2X AOP2
O3X AOP3
HOA2 2HOA
H51A AH51
H52A AH52
H4B AH4*
H3B AH3*
HO3A AHO3
H2B AH2*
H1B AH1*
H8A AH8
H61A AH61
H62A AH62
H2A AH2
H21N NH21
H51N NH51
H52N NH52
H4D NH4*
H3D NH3*
HO3N NHO3
H2D NH2*
HO2N NHO2
H1D NH1*
H2N NH2
H71N NH71
H72N NH72
H41N NH41
H42N NH42
H5N NH5
H6N NH6
HOP2 2HOP
HOP3 3HOP