Atom Nomenclature for DDF

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 DDF

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
NA2 NA2
N3 N3
C4 C4
O4 O4
C4A C4A
C5 C5
C6 C6
C7 C7
N8 N8
C8A C8A
C9 C9
C10 C10
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C C
O O
N N
CA CA
CB CB
CG CG
CD CD
OE1 OE1
OE2 OE2
CT CT
O1 O1
O2 O2
HN1 HN1
HN21 1HN2
HN22 2HN2
H51 1H5
H52 2H5
H6 H6
H71 1H7
H72 2H7
HN8 HN8
H91 1H9
H92 2H9
H101 1H10
H102 2H10
H12 H12
H13 H13
H15 H15
H16 H16
HN HN
HA HA
HB1 1HB
HB2 2HB
HG1 1HG
HG2 2HG
HOE2 2HOE
HO2 HO2