Atom Nomenclature for CEX

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 CEX

Atom Name (V3) Atom Name (V2)
C1A C1
C2A C6
C3A C11
C4A C16
C5A C21
C6A C26
O1A O1
O2A O2
O3A O7
O4A O12
O5A O17
O6A O22
C1B C2
C2B C7
C3B C12
C4B C17
C5B C22
C6B C27
O2B O3
O3B O8
O4B O13
O5B O18
O6B O23
C1C C3
C2C C8
C3C C13
C4C C18
C5C C23
C6C C28
O2C O4
O3C O9
O4C O14
O5C O19
O6C O24
C1D C4
C2D C9
C3D C14
C4D C19
C5D C24
C6D C29
O2D O5
O3D O10
O4D O15
O5D O20
O6D O25
C1E C5
C2E C10
C3E C15
C4E C20
C5E C25
C6E C30
O2E O6
O3E O11
O4E O16
O5E O21
O6E O26
H1A H1
H2A H7
H3A H17
H4A H27
H5A H33
H6A H38
H6AA H39
HO1A H2
HO2A H8
HO3A H18
HO6A H40
H1B H3
H2B H9
H3B H19
H4B H28
H5B H34
H6B H41
H6BA H42
HO2B H10
HO3B H20
HO6B H43
H1C H4
H2C H11
H3C H21
H4C H29
H5C H35
H6C H44
H6CA H45
HO2C H12
HO3C H22
HO6C H46
H1D H5
H2D H13
H3D H23
H4D H30
H5D H36
H6D H47
H6DA H48
HO2D H14
HO3D H24
HO6D H49
H1E H6
H2E H15
H3E H25
H4E H31
H5E H37
H6E H50
H6EA H51
HO2E H16
HO3E H26
HO4E H32
HO6E H52