Atom Nomenclature for AA9

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 AA9

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
N3 N3
C4 C4
C5 C5
C6 C6
C7 C7
C8 C8
C9 C9
C10 C10
O11 O11
N12 N12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
C18 C18
C19 C19
C20 C20
C21 C21
O22 O22
C23 C23
N24 N24
C25 C25
C26 C26
C27 C27
O28 O28
N29 N29
C30 C30
C31 C31
C32 C32
C33 C33
C34 C34
C35 C35
N36 N36
C37 C37
C38 C38
C39 C39
C40 C40
C41 C41
C42 C42
S43 S43
C44 C44
O45 O45
O46 O46
H11C H11C
H12C H12C
H13C H13C
H21C H21C
H22C H22C
H3 H3
H5 H5
H9 H9
H7 H7
H12 H12
H13 H13
H141 H141
H142 H142
H21 H21
H16 H16
H20 H20
H17 H17
H18 H18
H19 H19
H22 H22
H231 H231
H232 H232
H24 H24
H25 H25
H261 H261
H262 H262
H263 H263
H29 H29
H30 H30
H311 H311
H312 H312
H351 H351
H352 H352
H321 H321
H322 H322
H331 H331
H332 H332
H341 H341
H342 H342
H38 H38
H42 H42
H39 H39
H40 H40
H41 H41
H441 H441
H442 H442
H443 H443