Atom Nomenclature for R11

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 R11

Atom Name (V3) Atom Name (V2)
N1 N1
N2 N2
C1 C1
C2 C2
C3 C3
C4 C4
C5 C5
C6 C6
C7 C7
N N
C C
N3 N3
C8 C8
N9 N9
C3A C3A
C7A C7A
C10 C10
C11 C11
C12 C12
C13 C13
C14 C14
C9 C9
N4 N4
C15 C15
N16 N16
C17 C17
C18 C18
C19 C19
C20 C20
C21 C21
C22 C22
C23 C23
HN1 HN1
HN21 1HN2
HN22 2HN2
HC3 HC3
HC4 HC4
HC6 HC6
HC7 HC7
HN HN
H1C H1C
H2C H2C
H10C CH10
H11C CH11
H13C CH13
H141 1H14
H142 2H14
H143 3H14
HC91 1HC9
HC92 2HC9
H19C CH19
H20C CH20
H21C CH21
H22C CH22
H231 1H23
H232 2H23
H233 3H23