4lvs

From Proteopedia

(Difference between revisions)

Revision as of 12:07, 17 July 2019

DNA polymerase beta mismatched substrate complex with Mn2+, 2.5 min

Structural highlights

4lvs is a 4 chain structure with sequence from Human. This structure supersedes the now removed PDB entry 4klp. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Gene:	POLB (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

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

DNA polymerase (pol) beta is a model polymerase involved in gap-filling DNA synthesis utilizing two metals to facilitate nucleotidyl transfer. Previous structural studies have trapped catalytic intermediates by utilizing substrate analogs (dideoxy-terminated primer or nonhydrolysable incoming nucleotide). To identify additional intermediates during catalysis, we now employ natural substrates (correct and incorrect nucleotides) and follow product formation in real time with 15 different crystal structures. We are able to observe molecular adjustments at the active site that hasten correct nucleotide insertion and deter incorrect insertion not appreciated previously. A third metal binding site is transiently formed during correct, but not incorrect, nucleotide insertion. Additionally, long incubations indicate that pyrophosphate more easily dissociates after incorrect, compared to correct, nucleotide insertion. This appears to be coupled to subdomain repositioning that is required for catalytic activation/deactivation. The structures provide insights into a fundamental chemical reaction that impacts polymerase fidelity and genome stability.

Observing a DNA polymerase choose right from wrong.,Freudenthal BD, Beard WA, Shock DD, Wilson SH Cell. 2013 Jul 3;154(1):157-68. doi: 10.1016/j.cell.2013.05.048. PMID:23827680^[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
↑ Freudenthal BD, Beard WA, Shock DD, Wilson SH. Observing a DNA polymerase choose right from wrong. Cell. 2013 Jul 3;154(1):157-68. doi: 10.1016/j.cell.2013.05.048. PMID:23827680 doi:10.1016/j.cell.2013.05.048

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4lvs"

@@ Line 1: / Line 1: @@
 ==DNA polymerase beta mismatched substrate complex with Mn2+, 2.5 min==
-<StructureSection load='4lvs' size='340' side='right' caption='[[4lvs]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
+<StructureSection load='4lvs' size='340' side='right'caption='[[4lvs]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[4lvs]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4klp 4klp]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4LVS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4LVS FirstGlance]. <br>
@@ Line 19: / Line 19: @@
 </div>
 <div class="pdbe-citations 4lvs" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[DNA polymerase 3D structures|DNA polymerase 3D structures]]
 == References ==
 <references/>
@@ Line 24: / Line 27: @@
 </StructureSection>
 [[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Beard, W A]]
 [[Category: Freudenthal, B D]]

4lvs

From Proteopedia

Revision as of 12:07, 17 July 2019

DNA polymerase beta mismatched substrate complex with Mn2+, 2.5 min

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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