Atom Nomenclature for AL4

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 AL4

Atom Name (V3) Atom Name (V2)
C3 C3
C9 C9
C10 C10
C11 C11
C12 C12
C14 C14
C16 C16
O1A O1A
O2A O2A
N21 N21
S1 S1
C4 C4
C5 C5
C6 C6
S2 S2
S7 S7
O3B O3B
O4B O4B
N8 N8
N15 N15
O13 O13
C17 C17
H91 1H9
H92 2H9
H10 H10
H111 1H11
H112 2H11
H121 1H12
H122 2H12
H141 1H14
H142 2H14
H143 3H14
H161 1H16
H162 2H16
HNL1 1HNL
HNL2 2HNL
H4 H4
HNF HNF
H171 1H17
H172 2H17
H173 3H17