Atom Nomenclature for ROC

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 ROC

Atom Name (V3) Atom Name (V2)
C C1
O O1
N1 N1
C2 C2
C3 C3
C4 C4
C5 C6
C6 C7
C7 C8
C8 C9
C4A C5
C8A C10
N N2
CA C11
C1 C12
O1 O2
CB C13
CG C14
OD1 O3
ND2 N3
C9 C15
O2 O5
CA1 C16
N2 N4
CB1 C17
CG1 C18
CD1 C19
CD2 C20
CE1 C21
CE2 C22
CZ C23
N11 N5
CM C24
C21 C25
CC C26
O3 O7
C31 C27
C3A C28
C41 C29
C51 C30
C61 C31
C71 C32
C7A C33
C81 C34
N3 N6
CD C35
C11 C36
C22 C37
C32 C38
H3 H2
H4 H3
H5 H4
H6 H5
H7 H6
H8 H7
H H8
HA H10
HB2 H11
HB3 H12
HD21 H13
HD22 H14
HC H16
HO H17
HA1 H19
H1 H20
HB21 H22
HB31 H23
HD1 H24
HD2 H25
HE1 H26
HE2 H27
HZ H28
HM1 H29
HM2 H30
H2 H32
H31 H33
H32 H34
H3A H35
H41 H36
H42 H37
H51 H38
H52 H39
H61 H40
H62 H41
H71 H42
H72 H43
H7A H44
H81 H45
H82 H46
HN1 H48
H11 H50
H12 H51
H13 H52
H21 H53
H22 H54
H23 H55
H311 H56
H321 H57
H33 H58