Atom Nomenclature for BSD

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 BSD

Atom Name (V3) Atom Name (V2)
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
C18 C18
N21 N21
C21 C21
O21 O21
C23 C23
C24 C24
C25 C25
C26 C26
C27 C27
C28 C28
N22 N22
C29 C29
S2 S2
O23 O23
O24 O24
C20 C20
C22 C22
O22 O22
N3 N3
C31 C31
C32 C32
C33 C33
C34 C34
C35 C35
C36 C36
C37 C37
C38 C38
C39 C39
O3 O3
C30 C30
N4 N4
C41 C41
C42 C42
C43 C43
C44 C44
C45 C45
C46 C46
C47 C47
O4 O4
C48 C48
H11 H11
H12 H12
H13 H13
H14 H14
H15 H15
H17 H17
H181 1H18
H182 2H18
H183 3H18
H21 H21
H24 H24
H28 H28
H26 H26
H291 1H29
H292 2H29
H293 3H29
H201 1H20
H202 2H20
H203 3H20
H3 H3
H31 H31
H321 1H32
H322 2H32
H39 H39
H34 H34
H38 H38
H35 H35
H36 H36
H37 H37
HA HA
H301 1H30
H302 2H30
H4 H4
H411 1H41
H412 2H41
H43 H43
H47 H47
H45 H45
H46 H46
H481 1H48
H482 2H48
H483 3H48