Atom Nomenclature for NHR

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 NHR

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
NA2 NA2
N3 N3
C4 C4
O4 O4
C4A C4A
C8A C8A
C8 C8
C7 C7
C9 C9
C10 C10
CA1 CA1
OA1 OA1
C6 C6
C5 C5
C16 C16
C11 C11
C17 C17
O17 O17
C12 C12
C13 C13
C14 C14
C15 C15
N N
CA CA
C C
O O
CB CB
CG CG
CD CD
OE1 OE1
OE2 OE2
OT OT
OA2 OA2
HNA1 1HNA
HNA2 2HNA
H4O OH4
H8 H8
H7 H7
H91 1H9
H92 2H9
H101 1H10
H5 H5
H161 1H16
H121 1H12
H131 1H13
H151 1H15
HN HN
HA HA
HB1 1HB
HB2 2HB
HG1 1HG
HG2 2HG
HOE1 1HOE
HOT HOT
HOA1 1HOA