Atom Nomenclature for CMK

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 CMK

Atom Name (V3) Atom Name (V2)
N1C N1C
C2C C2C
N3C N3C
C4C C4C
C5C C5C
C6C C6C
O2C O2C
N4C N4C
C1' C1*
C2' C2*
O2' O2*
C3' C3*
C4' C4*
O4' O4*
O3' O3*
C5' C5*
O5' O5*
PA PA
O1A O1A
O2A O2A
O6 O6
C2 C2
O2 O2
C3 C3
C4 C4
O4 O4
C5 C5
C6 C6
C7 C7
C1 C1
O1X O1X
O1Y O1Y
O5 O5
C8 C8
O8 O8
O7 O7
H5C H5C
H6C H6C
H4C1 1H4C
H4C2 2H4C
H1' H1*
H2' H2*
HA HA
H3' H3*
H4' H4*
HB HB
H5'1 1H5*
H5'2 2H5*
HO1A HO1A
H3C1 1H3C
H3C2 2H3C
H4 H4
HC HC
H5 H5
H6 H6
H7 H7
H1X H1X
HD HD
H8C1 1H8C
H8C2 2H8C
H8 H8
HE HE