Function and Biology

Open ternary complex of R283K DNA polymerase beta with a metal free dCTP analog

EC 4.2.99.18: DNA-(apurinic or apyrimidinic site) lyase

Reaction catalysed:
The C-O-P bond 3' to the apurinic or apyrimidinic site in DNA is broken by a beta-elimination reaction, leaving a 3'-terminal unsaturated sugar and a product with a terminal 5'-phosphate
Systematic name:
DNA-(apurinic or apyrimidinic site) 5'-phosphomonoester-lyase
Alternative Name(s):
  • AP endonuclease class I
  • AP lyase
  • AP site-DNA 5'-phosphomonoester-lyase
  • Deoxyribonuclease (apurinic or apyrimidinic)
  • E. coli endonuclease III
  • E.coli endonuclease III
  • Endodeoxyribonuclease (apurinic or apyrimidinic)
  • Micrococcus luteus UV endonuclease
  • Phage-T(4) UV endonuclease
  • Phage-T4 UV endonuclease
  • X-ray endonuclease III

EC 2.7.7.7: DNA-directed DNA polymerase

Reaction catalysed:
Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1)
Systematic name:
Deoxynucleoside-triphosphate:DNA deoxynucleotidyltransferase (DNA-directed)
Alternative Name(s):
  • DNA duplicase
  • DNA nucleotidyltransferase
  • DNA nucleotidyltransferase (DNA-directed)
  • DNA polymerase
  • DNA polymerase I
  • DNA polymerase II
  • DNA polymerase III
  • DNA polymerase alpha
  • DNA polymerase beta
  • DNA polymerase gamma
  • DNA replicase
  • DNA-dependent DNA polymerase
  • Deoxynucleate polymerase
  • Deoxyribonucleate nucleotidyltransferase
  • Deoxyribonucleic acid duplicase
  • Deoxyribonucleic acid polymerase
  • Deoxyribonucleic duplicase
  • Deoxyribonucleic polymerase
  • Deoxyribonucleic polymerase I
  • Duplicase
  • Klenow fragment
  • Sequenase
  • Taq DNA polymerase
  • Taq Pol I
  • Tca DNA polymerase

Sequence families

Pfam Protein families (Pfam)
PF14791
Domain description: DNA polymerase beta thumb
Occurring in:
  1. DNA polymerase beta

PF14792
Domain description: DNA polymerase beta palm
Occurring in:
  1. DNA polymerase beta

PF10391
Domain description: Fingers domain of DNA polymerase lambda
Occurring in:
  1. DNA polymerase beta

PF14716
Domain description: Helix-hairpin-helix domain
Occurring in:
  1. DNA polymerase beta

InterPro InterPro annotations
IPR022312
Domain description: DNA polymerase family X
Occurring in:
  1. DNA polymerase beta
IPR002008
Domain description: DNA polymerase family X, beta-like
Occurring in:
  1. DNA polymerase beta
IPR043519
Domain description: Nucleotidyltransferase superfamily
Occurring in:
  1. DNA polymerase beta
IPR003583
Domain description: Helix-hairpin-helix DNA-binding motif, class 1
Occurring in:
  1. DNA polymerase beta
IPR002054
Domain description: DNA-directed DNA polymerase X
Occurring in:
  1. DNA polymerase beta
IPR027421
Domain description: DNA polymerase lambda lyase domain superfamily
Occurring in:
  1. DNA polymerase beta
IPR037160
Domain description: DNA polymerase, thumb domain superfamily
Occurring in:
  1. DNA polymerase beta
IPR029398
Domain description: DNA polymerase beta, thumb domain
Occurring in:
  1. DNA polymerase beta
IPR019843
Domain description: DNA polymerase family X, binding site
Occurring in:
  1. DNA polymerase beta
IPR028207
Domain description: DNA polymerase beta, palm domain
Occurring in:
  1. DNA polymerase beta
IPR018944
Domain description: DNA polymerase lambda, fingers domain
Occurring in:
  1. DNA polymerase beta
IPR010996
Domain description: DNA polymerase beta-like, N-terminal domain
Occurring in:
  1. DNA polymerase beta

Structure domains

CATH CATH domains
3.30.210.10
Class: Alpha Beta
Architecture: 2-Layer Sandwich
Topology: Beta Polymerase; domain 3
Homology: DNA polymerase, thumb domain
Occurring in:
  1. DNA polymerase beta
3.30.460.10
Class: Alpha Beta
Architecture: 2-Layer Sandwich
Topology: Beta Polymerase; domain 2
Homology: Beta Polymerase, domain 2
Occurring in:
  1. DNA polymerase beta
1.10.150.20
Class: Mainly Alpha
Architecture: Orthogonal Bundle
Topology: DNA polymerase; domain 1
Homology: 5' to 3' exonuclease, C-terminal subdomain
Occurring in:
  1. DNA polymerase beta
1.10.150.110
Class: Mainly Alpha
Architecture: Orthogonal Bundle
Topology: DNA polymerase; domain 1
Homology: DNA polymerase beta, N-terminal domain-like
Occurring in:
  1. DNA polymerase beta