7rbn

From Proteopedia

(Difference between revisions)

Current revision

Human DNA polymerase beta crosslinked complex, 20 min Ca to Mg exchange

Structural highlights

7rbn is a 4 chain structure with sequence from Homo sapiens and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.9Å
Ligands:	,
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

SignificanceBase excision repair (BER) is one of the major DNA repair pathways used to fix a myriad of cellular DNA lesions. The enzymes involved in BER, including DNA polymerase beta (Polbeta), have been identified and characterized, but how they act together to efficiently perform BER has not been fully understood. Through gel electrophoresis, mass spectrometry, and kinetic analysis, we discovered that the two enzymatic activities of Polbeta can be interlocked, rather than functioning independently from each other, when processing DNA intermediates formed in BER. The finding prompted us to hypothesize a modified BER pathway. Through conventional and time-resolved X-ray crystallography, we solved 11 high-resolution crystal structures of cross-linked Polbeta complexes and proposed a detailed chemical mechanism for Polbeta's 5'-deoxyribose-5-phosphate lyase activity.

Interlocking activities of DNA polymerase beta in the base excision repair pathway.,Kumar A, Reed AJ, Zahurancik WJ, Daskalova SM, Hecht SM, Suo Z Proc Natl Acad Sci U S A. 2022 Mar 8;119(10):e2118940119. doi: , 10.1073/pnas.2118940119. Epub 2022 Mar 1. PMID:35238634^[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
↑ Kumar A, Reed AJ, Zahurancik WJ, Daskalova SM, Hecht SM, Suo Z. Interlocking activities of DNA polymerase β in the base excision repair pathway. Proc Natl Acad Sci U S A. 2022 Mar 8;119(10):e2118940119. PMID:35238634 doi:10.1073/pnas.2118940119

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/7rbn"

Categories: Homo sapiens | Large Structures | Synthetic construct | Kumar A

@@ Line 5: / Line 5: @@
 <table><tr><td colspan='2'>[[7rbn]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7RBN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7RBN FirstGlance]. <br>
 </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9&#8491;</td></tr>
-<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=QPJ:2-deoxy-3,5-di-O-phosphono-D-erythro-pentitol'>QPJ</scene></td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=QPJ:[(2~{R},3~{S})-2,5-bis(oxidanyl)-1-phosphonooxy-pentan-3-yl]+dihydrogen+phosphate'>QPJ</scene></td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7rbn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7rbn OCA], [https://pdbe.org/7rbn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7rbn RCSB], [https://www.ebi.ac.uk/pdbsum/7rbn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7rbn ProSAT]</span></td></tr>
 </table>

7rbn

From Proteopedia

Current revision

Human DNA polymerase beta crosslinked complex, 20 min Ca to Mg exchange

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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