Atom Nomenclature for TN4

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 TN4

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
C3 C3
C4 C4
CL4 CL4
C5 C5
C6 C6
C11 C11
O11 O11
C21 C21
C22 C22
C23 C23
C24 C24
C25 C25
C2A C2A
O2A O2A
C2B C2B
C2C C2C
C31 C31
O31 O31
C41 C41
O41 O41
N42 N42
C43 C43
C44 C44
O4A O4A
O4B O4B
H2 H2
H3 H3
H4 H4
H5 H5
H5A H5A
H6 H6
H6A H6A
H11 H11
H11A H11A
H11B H11B
HO11 HO11
H22 H22
H23 H23
H23A H23A
H24 H24
H2A H2A
H2AA H2AA
H2AB H2AB
H2B H2B
H2BA H2BA
H2BB H2BB
H2C H2C
H2CA H2CA
H2CB H2CB
H31 H31
H31A H31A
H31B H31B
HN42 HN42
H44 H44
H44A H44A