Atom Nomenclature for CDN

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 CDN

Atom Name (V3) Atom Name (V2)
PB2 PB2
O1 O1
OB5 OB5
OB2 OB2
OB3 OB3
OB4 OB4
CB2 CB2
C1 C1
CB3 CB3
CB4 CB4
CB6 CB6
OB8 OB8
OB9 OB9
CB7 CB7
C71 C71
C72 C72
C73 C73
C74 C74
C75 C75
OB6 OB6
OB7 OB7
CB5 CB5
C51 C51
C52 C52
C53 C53
C54 C54
C55 C55
C56 C56
C57 C57
C58 C58
C59 C59
C60 C60
C61 C61
C62 C62
C63 C63
C64 C64
PA1 PA1
OA5 OA5
OA2 OA2
OA4 OA4
OA3 OA3
CA2 CA2
CA3 CA3
CA4 CA4
CA6 CA6
OA8 OA8
OA9 OA9
CA7 CA7
C31 C31
C32 C32
C33 C33
C34 C34
C35 C35
C36 C36
C37 C37
C38 C38
C39 C39
C40 C40
C41 C41
C42 C42
OA6 OA6
OA7 OA7
CA5 CA5
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
C18 C18
C19 C19
C20 C20
C21 C21
C22 C22
C23 C23
C24 C24
HO11 1HO1
HB31 1HB3
HB21 1HB2
HB22 2HB2
HC11 1HC1
HB32 2HB3
HB33 3HB3
HB41 1HB4
HB61 1HB6
HB62 2HB6
HB91 1HB9
HB71 1HB7
H711 1H71
H712 2H71
H721 1H72
H722 2H72
H731 1H73
H732 2H73
H741 1H74
H742 2H74
H751 1H75
H752 2H75
H753 3H75
HB7O OHB7
HB51 1HB5
H511 1H51
H512 2H51
H521 1H52
H522 2H52
H531 1H53
H532 2H53
H541 1H54
H542 2H54
H551 1H55
H552 2H55
H561 1H56
H562 2H56
H571 1H57
H572 2H57
H581 1H58
H582 2H58
H591 1H59
H592 2H59
H601 1H60
H602 2H60
H611 1H61
H612 2H61
H621 1H62
H622 2H62
H631 1H63
H632 2H63
H641 1H64
H642 2H64
H643 3H64
HA3O OHA3
HA21 1HA2
HA22 2HA2
HA31 1HA3
HA32 2HA3
HA41 1HA4
HA61 1HA6
HA62 2HA6
HA91 1HA9
HA71 1HA7
H311 1H31
H312 2H31
H321 1H32
H322 2H32
H331 1H33
H332 2H33
H341 1H34
H342 2H34
H351 1H35
H352 2H35
H361 1H36
H362 2H36
H371 1H37
H372 2H37
H381 1H38
H382 2H38
H391 1H39
H392 2H39
H401 1H40
H402 2H40
H411 1H41
H412 2H41
H421 1H42
H422 2H42
H423 3H42
HA7O OHA7
HA51 1HA5
H111 1H11
H112 2H11
H121 1H12
H122 2H12
H131 1H13
H132 2H13
H141 1H14
H142 2H14
H151 1H15
H152 2H15
H161 1H16
H162 2H16
H171 1H17
H172 2H17
H181 1H18
H182 2H18
H191 1H19
H192 2H19
H201 1H20
H202 2H20
H211 1H21
H212 2H21
H221 1H22
H222 2H22
H231 1H23
H232 2H23
H241 1H24
H242 2H24
H243 3H24