Atom Nomenclature for AB9

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 AB9

Atom Name (V3) Atom Name (V2)
C11 C11
C12 C12
C21 C21
C22 C22
C23 C23
C24 C24
C25 C25
C26 C26
C29 C29
C30 C30
C31 C31
C32 C32
C33 C33
C35 C35
O11 O11
N21 N21
O31 O31
C41 C41
O41 O41
C51 C51
O51 O51
C61 C61
N61 N61
N12 N12
N32 N32
C42 C42
C52 C52
O52 O52
C62 C62
O62 O62
N31 N31
N34 N34
O36 O36
N27 N27
O28 O28
H11 H11
H12 H12
H21 H21
H221 1H22
H222 2H22
H24 H24
H251 1H25
H252 2H25
H261 1H26
H262 2H26
H291 1H29
H292 2H29
H301 1H30
H302 2H30
H3 H3
H32 H32
H331 1H33
H332 2H33
H351 1H35
H352 2H35
H211 1H21
H212 2H21
H4 H4
H41 H41
H2 H2
H51 H51
H611 1H61
H612 2H61
H11A 1H1
H12A 2H1
H5 H5
H321 1H32
H322 2H32
H42 H42
H52 H52
H1 H1
H62 H62
H31 H31
H341 1H34
H342 2H34
H271 1H27
H272 2H27
H28 H28