Atom Nomenclature for CXU

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 CXU

Atom Name (V3) Atom Name (V2)
CL CL
C1 C1
O1 O1
C2 C2
N2 N2
C3 C3
S4 S4
C5 C5
C6 C6
N7 N7
C8 C8
C21 C21
O21 O21
C22 C22
C23 C23
O24 O24
N25 N25
C26 C26
C27 C27
C28 C28
C29 C29
C30 C30
C31 C31
C32 C32
C33 C33
C51 C51
C52 C52
O81 O81
O82 O82
H1 H1
H2 H2
HN2 HN2
H3 H3
H6 H6
HN7 HN7
H27 H27
H27A H27A
H27B H27B
H30 H30
H31 H31
H32 H32
H33 H33
H51 H51
H51A H51A
H51B H51B
H52 H52
H52A H52A
H52B H52B
HO81 HO81