Atom Nomenclature for MTX

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 MTX

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
NA2 NA2
N3 N3
C4 C4
NA4 NA4
C4A C4A
N5 N5
C6 C6
C7 C7
N8 N8
C8A C8A
C9 C9
N10 N10
CM CM
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C C
O O
N N
CA CA
CT CT
O1 O1
O2 O2
CB CB
CG CG
CD CD
OE1 OE1
OE2 OE2
HN21 1HN2
HN22 2HN2
HN41 1HN4
HN42 2HN4
H7 H7
H91 1H9
H92 2H9
HM1 1HM
HM2 2HM
HM3 3HM
H12 H12
H13 H13
H15 H15
H16 H16
HN HN
HA HA
HO2 HO2
HB1 1HB
HB2 2HB
HG1 1HG
HG2 2HG
HOE2 2HOE