Atom Nomenclature for UBX

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 UBX

Atom Name (V3) Atom Name (V2)
C3 C3
C2 C2
C1 C1
C6 C6
C5 C5
C4 C4
C7 C7
O8 O8
C9 C9
O19 O19
N10 N10
C11 C11
P12 P12
O21 O21
O20 O20
N13 N13
C14 C14
C15 C15
N16 N16
C17 C17
C22 C22
O23 O23
C27 C27
C28 C28
C29 C29
H3 H3
H2 H2
H1 H1
H6 H6
H5 H5
H7 H7
H7A H7A
HN10 HN10
H11 H11
H11A H11A
HO20 HO20
HN13 HN13
H14 H14
H17 H17
H17A H17A
H22 H22
H22A H22A
H27 H27
H28 H28
H28A H28A
H28B H28B
H29 H29
H29A H29A
H29B H29B
H25 H25
H26 H26