Atom Nomenclature for AXF

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 AXF

Atom Name (V3) Atom Name (V2)
C2 C2
C4 C4
S1 S1
N6 N6
C8 C8
C11 C11
C14 C14
C17 C17
N18 N18
C20 C20
C22 C22
N23 N23
C25 C25
C27 C27
S30 S30
C31 C31
C34 C34
C36 C36
C38 C38
C41 C41
O43 O43
C45 C45
C48 C48
C50 C50
C54 C54
O55 O55
N56 N56
C58 C58
C61 C61
C64 C64
C67 C67
O71 O71
C72 C72
O76 O76
H2 H2
H4 H4
HN6 HN6
H81 1H8
H82 2H8
H111 1H11
H112 2H11
H141 1H14
H142 2H14
H18 H18
H20 H20
H23 H23
H25 H25
H271 1H27
H272 2H27
H311 1H31
H312 2H31
H34 H34
H36 H36
H381 1H38
H382 2H38
H41 H41
H43 H43
H451 1H45
H452 2H45
H48 H48
H501 1H50
H502 2H50
H503 3H50
H56 H56
H581 1H58
H582 2H58
H611 1H61
H612 2H61
H641 1H64
H642 2H64
H671 1H67
H672 2H67
H673 3H67
H721 1H72
H722 2H72
H723 3H72