Atom Nomenclature for UN1

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 UN1

Atom Name (V3) Atom Name (V2)
C1' C1'
O1' O1'
O2' O2'
O O58
C1 C1
C C3
CA C4
C5 C5
C6 C6
N N4
OXT O5'
H2' H2'
H1C1 H1C1
H1C2 H1C2
HA H4
H5C1 H5C1
H5C2 H5C2
H6C1 H6C1
H6C2 H6C2
H H4N1
H2 H4N2
HXT H5'