Atom Nomenclature for TXL

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 TXL

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
C3 C3
C4 C4
C5 C5
C6 C6
C7 C7
C8 C8
C9 C9
C10 C10
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
C18 C18
C19 C19
C20 C20
O1 O1
O2 O2
O3 O3
O4 O4
O5 O5
O6 O6
O7 O7
O8 O8
C21 C21
O9 O9
C22 C22
O10 O10
C23 C23
C24 C24
C25 C25
C26 C26
C27 C27
C28 C28
C29 C29
N1 N1
C30 C30
O11 O11
O12 O12
C31 C31
C32 C32
C33 C33
C34 C34
C35 C35
O13 O13
C36 C36
C37 C37
C38 C38
C39 C39
C40 C40
C41 C41
C42 C42
O14 O14
C43 C43
H2 H2
H3 H3
H5 H5
H61 1H6
H62 2H6
H7 H7
H10 H10
H13 H13
H141 1H14
H142 2H14
H161 1H16
H162 2H16
H163 3H16
H171 1H17
H172 2H17
H173 3H17
H181 1H18
H182 2H18
H183 3H18
H191 1H19
H192 2H19
H193 3H19
H201 1H20
H202 2H20
HO1 HO1
HO5 HO5
HO7 HO7
H22 H22
HO0 HO0
H23 H23
H25 H25
H26 H26
H27 H27
H28 H28
H29 H29
HN1 HN1
H321 1H32
H322 2H32
H323 3H32
H331 1H33
H332 2H33
H333 3H33
H341 1H34
H342 2H34
H343 3H34
H37 H37
H38 H38
H39 H39
H40 H40
H41 H41
H431 1H43
H432 2H43
H433 3H43