Atom Nomenclature for MI3

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 MI3

Atom Name (V3) Atom Name (V2)
CA7 CA7
NA1 NA1
CA6 CA6
CA5 CA5
CA4 CA4
CA3 CA3
CA2 CA2
CA1 CA1
CA CA
OA OA
O3' O3'
C3' C3'
C2' C2'
O2' O2'
C4' C4'
C5' C5'
O5' O5'
PA PA
O3A O3A
O2A O2A
O1A O1A
PB PB
O3B O3B
O2B O2B
O1B O1B
PG PG
O3G O3G
O1G O1G
O2G O2G
O4' O4'
C1' C1'
N9 N9
C8 C8
N7 N7
C5 C5
C4 C4
N3 N3
C2 C2
N1 N1
C6 C6
O6 O6
HA7 HA7
HA7A HA7A
HA7B HA7B
HNA1 HNA1
HA5 HA5
HA4 HA4
HA3 HA3
HA2 HA2
H3' H3'
H2' H2'
HO2' HO2'
H4' H4'
H5' H5'
H5'A H5'A
H1' H1'
H8 H8
H2 H2
HN1 HN1
HO3A HO3A
HO3B HO3B
HO3G HO3G
HO1G HO1G