Atom Nomenclature for DR7

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 DR7

Atom Name (V3) Atom Name (V2)
CAA CAA
OBI OBI
CBK CBK
OAI OAI
N N
CA CA
CB CB
CAE CAE
CG2 CG2
CG1 CG1
C C
O O
NBG NBG
CBT CBT
CBA CBA
CBO CBO
CAT CAT
CAP CAP
CAN CAN
CAQ CAQ
CAU CAU
CBS CBS
OAM OAM
CBC CBC
NBW NBW
NBH NBH
CBN CBN
OAL OAL
CBV CBV
CBY CBY
CAH CAH
CAF CAF
CAG CAG
NBF NBF
CBL CBL
OAJ OAJ
OBJ OBJ
CAB CAB
CBB CBB
CBP CBP
CAW CAW
CAY CAY
CAX CAX
CAZ CAZ
CBQ CBQ
CBR CBR
CAV CAV
CAR CAR
CAO CAO
CAS CAS
NBD NBD
HAA1 1HAA
HAA2 2HAA
HAA3 3HAA
HN HN
HA HA
HAE1 1HAE
HAE2 2HAE
HAE3 3HAE
HG21 1HG2
HG22 2HG2
HG23 3HG2
HG11 1HG1
HG12 2HG1
HG13 3HG1
HBG HBG
HBT HBT
HBA1 1HBA
HBA2 2HBA
HAT HAT
HAP HAP
HAN HAN
HAQ HAQ
HAU HAU
HBS HBS
HAM HAM
HBC1 1HBC
HBC2 2HBC
HBH HBH
HBV HBV
HAH1 1HAH
HAH2 2HAH
HAH3 3HAH
HAF1 1HAF
HAF2 2HAF
HAF3 3HAF
HAG1 1HAG
HAG2 2HAG
HAG3 3HAG
HBF HBF
HAB1 1HAB
HAB2 2HAB
HAB3 3HAB
HBB1 1HBB
HBB2 2HBB
HAW HAW
HAY HAY
HAX HAX
HAZ HAZ
HAV HAV
HAR HAR
HAO HAO
HAS HAS