Atom Nomenclature for FCG

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 FCG

Atom Name (V3) Atom Name (V2)
PA AP
O1A AO1
O2A AO2
O5B AO5*
C5B AC5*
C4B AC4*
O4B AO4*
C1B AC1*
N9A AN9
C4A AC4
N3A AN3
C2A AC2
N1A AN1
C6A AC6
N6A AN6
C5A AC5
N7A AN7
C8A AC8
C2B AC2*
O2B AO2*
C3B AC3*
O3B AO3*
O3P O3P
P P
O1P O1P
O2P O2P
O5' O5*
C5' C5*
C4' C4*
O4' O4*
C3' C3*
O3' O3*
C2' C2*
O2' O2*
C1' C1*
N10 N10
C10 C10
N1 N1
C2 C2
O2 O2
N3 N3
C4 C4
O4 O4
C4X C4A
N5 N5
C9A C9A
C5X C5A
C9 C9
C6 C6
C7 C7
C7M C7M
C11 C11
C12 C12
C13 C13
O14 O14
C8M C8M
C8 C8
HO2 HO2
H11 1H1
H12 2H1
H5 H5
H1' H1*
H7 H7
HN61 1HN6
HN62 2HN6
H8 H8
H111 H11
H122 H12
H15 H15
H16 H16
H2P H2P
H5'1 1H5*
H5'2 2H5*
H4' H4*
H3 H3
H3' H3*
H2 H2
H2' H2*
H1 H1
H1'1 1H1*
H1'2 2H1*
H10 H10
HN1 HN1
HN3 HN3
H4 H4
HO4 HO4
H9 H9
H6 H6
H7M1 1H7M
H7M2 2H7M
H7M3 3H7M
H141 1H11
H112 2H11
H121 1H12
H142 2H12
H13 H13
H14 H14
H8M1 1H8M
H8M2 2H8M
H8M3 3H8M