Atom Nomenclature for NCU

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 NCU

Atom Name (V3) Atom Name (V2)
N1 N1
C7 C1
C6 C2
C5 C3
C4 C4
C2 C5
O2 O1
P P1
OP1 O2
OP2 O3
O5' O4
N3 N2
N4 N3
C2' C6
C5' C7
C4' C8
O4' O5
C1' C9
C3' C10
O3' O6
O2' O7
C6' C11
N6' N4
C7' C12
H1 H1
H2 H2
H3 H3
HOP2 H4
H4 H6
H41 H7
H42 H8
H2' H9
H5' H10
H5'' H11
H1' H12
H3' H13
HO3' H14
H15 H15
H16 H16
H17 H17
H18 H18
H19 H19
OP3 OP3
HOP3 HOP3