Atom Nomenclature for PBU

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 PBU

Atom Name (V3) Atom Name (V2)
P1 P1
P4 P4
P5 P5
C3' C3'
C2' C2'
O2' O2'
C1' C1'
O1' O1'
C1 C1
O1 O1
C2 C2
O2 O2
C3 C3
O3 O3
C4 C4
O4 O4
C5 C5
O5 O5
C6 C6
O6 O6
C7 C7
O7 O7
C8 C8
C9 C9
C10 C10
C11 C11
O11 O11
C12 C12
C13 C13
C14 C14
O41 O41
O42 O42
O43 O43
O51 O51
O52 O52
O53 O53
OP1 OP1
OP2 OP2
OP3 OP3
H3'1 H3'1
H3'2 H3'2
H2' H2'
H1'1 H1'1
H1'2 H1'2
H1 H1
H2 H2
H02 H02
H3 H3
H03 H03
H4 H4
H5 H5
H6 H6
H06 H06
H81 H81
H82 H82
H91 H91
H92 H92
H11 H11
H12 H12
H13 H13
H121 H121
H122 H122
H131 H131
H132 H132
H141 H141
H142 H142
H143 H143
H42 H42
H43 H43
H52 H52
H53 H53
HP3 HP3