Atom Nomenclature for NHM

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 NHM

Atom Name (V3) Atom Name (V2)
N6A N6A
C6A C6A
N1A N1A
C2A C2A
N3A N3A
C4A C4A
C5A C5A
N9A N9A
N7A N7A
C8A C8A
CEM CEM
CAM CAM
CBM CBM
CCM CCM
CDM CDM
C9M C9M
C8M C8M
C7M C7M
C6M C6M
C2M C2M
C3M C3M
C4M C4M
C5M C5M
C1M C1M
O1M O1M
CP CP
P3X P3X
O7A O7A
O8A O8A
O9A O9A
O3X O3X
S1 S1
N4 N4
C5 C5
O5 O5
C6 C6
C7 C7
N8 N8
C9 C9
O9 O9
C13 C13
C11 C11
C14 C14
C12 C12
P1A P1A
O2A O2A
O1A O1A
O3A O3A
O5X O5X
C4X C4X
O4X O4X
C1X C1X
C2X C2X
O2X O2X
C3X C3X
C5X C5X
P2A P2A
O4A O4A
O5A O5A
O6A O6A
C10 C10
O10 O10
C3 C3
C2 C2
HN61 1HN6
HN62 2HN6
H2A H2A
H8A H8A
HEM1 1HEM
HEM2 2HEM
HEM3 3HEM
HAM1 1HAM
HAM2 2HAM
HBM1 1HBM
HBM2 2HBM
HCM1 1HCM
HCM2 2HCM
HDM1 1HDM
HDM2 2HDM
H9M1 1H9M
H9M2 2H9M
H8M1 1H8M
H8M2 2H8M
H7M1 1H7M
H7M2 2H7M
H6M1 1H6M
H6M2 2H6M
H2M1 1H2M
H2M2 2H2M
H3M1 1H3M
H3M2 2H3M
H4M1 1H4M
H4M2 2H4M
H5M1 1H5M
H5M2 2H5M
HP1 1HP
HP2 2HP
HO7A AHO7
HO8A AHO8
HN4 HN4
H61 1H6
H62 2H6
H71 1H7
H72 2H7
HN8 HN8
H131 1H13
H132 2H13
H133 3H13
H141 1H14
H142 2H14
H143 3H14
H121 1H12
H122 2H12
HO1A AHO1
H4X H4X
H1X H1X
H2X H2X
HO2X XHO2
H3X H3X
H5X1 1H5X
H5X2 2H5X
HO5A AHO5
H10 H10
HOA HOA
H31 1H3
H32 2H3
H21 1H2
H22 2H2