Atom Nomenclature for IBI

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 IBI

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
C5 C5
C6 C6
C7 C7
C8 C8
C11 C11
C12 C12
C15 C15
C16 C16
C17 C17
C18 C18
C21 C21
N22 N22
C24 C24
C31 C31
C32 C32
C33 C33
C34 C34
C35 C35
C36 C36
C38 C38
C39 C39
O40 O40
O37 O37
C14 C14
N19 N19
C26 C26
N27 N27
C25 C25
N23 N23
N28 N28
C29 C29
C20 C20
O30 O30
C13 C13
N41 N41
C9 C9
C10 C10
N3 N3
N4 N4
C42 C42
C43 C43
C45 C45
C44 C44
H1 H1
H1A H1A
H2 H2
H2A H2A
H5 H5
H5A H5A
H6 H6
H6A H6A
H7 H7
H7A H7A
H8 H8
H8A H8A
H11 H11
H11A H11A
H12 H12
H12A H12A
H15 H15
H18 H18
H21 H21
H31 H31
H31A H31A
H32 H32
H32A H32A
H32B H32B
H33 H33
H34 H34
H34A H34A
H34B H34B
H35 H35
H35A H35A
H35B H35B
H36 H36
H36A H36A
H36B H36B
H38 H38
H38A H38A
H38B H38B
HN19 HN19
H29 H29
H13 H13
HN41 HN41
H9 H9
H10 H10
H42 H42
H42A H42A
H43 H43
H45 H45
H45A H45A
H44 H44
H44A H44A