Atom Nomenclature for ILA

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 ILA

Atom Name (V3) Atom Name (V2)
N N
CA CA
CB CB
CG2 CG2
CG1 CG1
CD CD
C C
O O
SA SA
O1A O1A
O2A O2A
N3A N3A
N5' N5'
C5' C5'
C4' C4'
O4' O4'
C1' C1'
N9 N9
C4 C4
N3 N3
C2 C2
N1 N1
C6 C6
N6 N6
C5 C5
N7 N7
C8 C8
C2' C2'
O2' O2'
C3' C3'
O3' O3'
HN1 1HN
HN2 2HN
HA1 1HA
HB HB
HG21 1HG2
HG22 2HG2
HG23 3HG2
HG11 1HG1
HG12 2HG1
HD1 1HD
HD2 2HD
HD3 3HD
HNA HNA
HN5 HN5
H51 1H5
H52 2H5
H4 H4
H1 H1
H2 H2
H61 1H6
H62 2H6
H8 H8
H2' H2'
HO2 HO2
H3 H3
HO3 HO3