Atom Nomenclature for TRR

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 TRR

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
N2 N2
N3 N3
C4 C4
N4 N4
C5 C5
C6 C6
C7 C7
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
O13 O13
O14 O14
O15 O15
C17 C17
C18 C18
C19 C19
H1 H1
H21 1H2
H22 2H2
H41 1H4
H42 2H4
H6 H6
H71 1H7
H72 2H7
H12 H12
H16 H16
H171 1H17
H172 2H17
H173 3H17
H181 1H18
H182 2H18
H183 3H18
H191 1H19
H192 2H19
H193 3H19