Atom Nomenclature for HCP

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 HCP

Atom Name (V3) Atom Name (V2)
C3 C3
C2 C2
N1 N1
C6 C6
C4 C4
C4A C4A
N2 N2
C C
CA1 CA1
CB1 CB1
CB2 CB2
CA2 CA2
P2 P2
O6 O6
O7 O7
O8 O8
O1 O1
C2A C2A
C5 C5
C5A C5A
O2 O2
P1 P1
O5 O5
O3 O3
O4 O4
HC6 HC6
HC4 HC4
HA11 1HA1
HA12 2HA1
HB11 1HB1
HB12 2HB1
HB21 1HB2
HB22 2HB2
HA21 1HA2
HA22 2HA2
HO6 HO6
HO8 HO8
HO1 HO1
HC21 1HC2
HC22 2HC2
HC23 3HC2
HC51 1HC5
HC52 2HC5
HO3 HO3
HO4 HO4