| Structural highlights
Function
[DPOLB_HUMAN] Repair polymerase that plays a key role in base-excision repair. Has 5'-deoxyribose-5-phosphate lyase (dRP lyase) activity that removes the 5' sugar phosphate and also acts as a DNA polymerase that adds one nucleotide to the 3' end of the arising single-nucleotide gap. Conducts 'gap-filling' DNA synthesis in a stepwise distributive fashion rather than in a processive fashion as for other DNA polymerases.[1] [2] [3] [4]
Publication Abstract from PubMed
The influence of water: Crystallization of (R/S)-alpha,beta-CHF-dATP with the preorganized pol beta-DNA complex shows that (S)-alpha,beta-CHF-dATP is preferentially bound to the active site with the CF fluorine proximal to a structural water bound to Asp276.
Stereospecific Formation of a Ternary Complex of (S)-alpha,beta-Fluoromethylene-dATP with DNA Pol beta.,Chamberlain BT, Batra VK, Beard WA, Kadina AP, Shock DD, Kashemirov BA, McKenna CE, Goodman MF, Wilson SH Chembiochem. 2012 Mar 5;13(4):528-30. doi: 10.1002/cbic.201100738. Epub 2012 Feb , 7. PMID:22315190[5]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Bennett RA, Wilson DM 3rd, Wong D, Demple B. Interaction of human apurinic endonuclease and DNA polymerase beta in the base excision repair pathway. Proc Natl Acad Sci U S A. 1997 Jul 8;94(14):7166-9. PMID:9207062
- ↑ Matsumoto Y, Kim K, Katz DS, Feng JA. Catalytic center of DNA polymerase beta for excision of deoxyribose phosphate groups. Biochemistry. 1998 May 5;37(18):6456-64. PMID:9572863 doi:10.1021/bi9727545
- ↑ DeMott MS, Beyret E, Wong D, Bales BC, Hwang JT, Greenberg MM, Demple B. Covalent trapping of human DNA polymerase beta by the oxidative DNA lesion 2-deoxyribonolactone. J Biol Chem. 2002 Mar 8;277(10):7637-40. Epub 2002 Jan 22. PMID:11805079 doi:10.1074/jbc.C100577200
- ↑ Parsons JL, Dianova II, Khoronenkova SV, Edelmann MJ, Kessler BM, Dianov GL. USP47 is a deubiquitylating enzyme that regulates base excision repair by controlling steady-state levels of DNA polymerase beta. Mol Cell. 2011 Mar 4;41(5):609-15. doi: 10.1016/j.molcel.2011.02.016. PMID:21362556 doi:10.1016/j.molcel.2011.02.016
- ↑ Chamberlain BT, Batra VK, Beard WA, Kadina AP, Shock DD, Kashemirov BA, McKenna CE, Goodman MF, Wilson SH. Stereospecific Formation of a Ternary Complex of (S)-alpha,beta-Fluoromethylene-dATP with DNA Pol beta. Chembiochem. 2012 Mar 5;13(4):528-30. doi: 10.1002/cbic.201100738. Epub 2012 Feb , 7. PMID:22315190 doi:10.1002/cbic.201100738
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