Atom Nomenclature for NDC

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 NDC

Atom Name (V3) Atom Name (V2)
PA PA
O1A O1A
O2A O2A
O5' O5'
C5' C5'
C4' C4'
O4' O4'
C3' C3'
O3' O3'
C2' C2'
O2' O2'
C1' C1'
N9A N9A
C8A C8A
N7A N7A
C5A C5A
C6A C6A
N6A N6A
N1A N1A
C2A C2A
N3A N3A
C4A C4A
OPP OPP
PN PN
O1N O1N
O2N O2N
O5B O5*
C5B C5*
C4B C4*
O4B O4*
C3B C3*
O3B O3*
C2B C2*
O2B O2*
C1B C1*
N1N N1N
C2N C2N
C3N C3N
C7N C7N
O7N O7N
N7N N7N
C4N C4N
C5N C5N
C6N C6N
CC1 CC1
OC1 OC1
CC2 CC2
CC3 CC3
CC4 CC4
CC5 CC5
CC6 CC6
HOA2 2HOA
H5'1 1H5'
H5'2 2H5'
H4' H4'
H3' H3'
HO'3 3HO'
H2' H2'
HO'2 2HO'
H1' H1'
H8A H8A
H6A1 1H6A
H6A2 2H6A
H2A H2A
H5A1 1H5*
H5A2 2H5*
H4B H4*
H3B H3*
HOA3 3HO*
H2B H2*
HOB2 2HO*
H1B H1*
H2N H2N
H7N1 1H7N
H7N2 2H7N
H5N H5N
H6N H6N
HC21 1HC2
HC22 2HC2
HC31 1HC3
HC32 2HC3
HC41 1HC4
HC42 2HC4
HC51 1HC5
HC52 2HC5
HC6 HC6