Atom Nomenclature for HEF

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 HEF

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
O2 O2
N3 N3
C4 C4
O4 O4
C5 C5
C6 C6
CM5 CM5
CM CM
OM OM
CE1 CE1
CE2 CE2
OE OE
S' S'
C1' C1'
C2' C2'
C3' C3'
C4' C4'
C5' C5'
C6' C6'
HN3 HN3
HM51 1HM5
HM52 2HM5
HM53 3HM5
HM1 1HM
HM2 2HM
HE11 1HE1
HE12 2HE1
HE21 1HE2
HE22 2HE2
HOE HOE
H2' H2'
H3' H3'
H4' H4'
H5' H5'
H6' H6'