3m9m

<StructureSection load='3m9m' size='340' side='right' caption='[[3m9m]], [[Resolution|resolution]] 2.90&Aring;' scene=''>

<table><tr><td colspan='2'>[[3m9m]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_35091 Atcc 35091]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3M9M OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3M9M FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CPT:CISPLATIN'>CPT</scene>, <scene name='pdbligand=CTP:CYTIDINE-5-TRIPHOSPHATE'>CTP</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3m9n|3m9n]], [[3m9o|3m9o]]</td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">dbh, dpo4, SSO2448 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2287 ATCC 35091])</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3m9m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3m9m OCA], [http://pdbe.org/3m9m PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3m9m RCSB], [http://www.ebi.ac.uk/pdbsum/3m9m PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3m9m ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/DPO4_SULSO DPO4_SULSO]] Poorly processive, error-prone DNA polymerase involved in untargeted mutagenesis. Copies undamaged DNA at stalled replication forks, which arise in vivo from mismatched or misaligned primer ends. These misaligned primers can be extended by PolIV. Exhibits no 3'-5' exonuclease (proofreading) activity. It is involved in translesional synthesis.[HAMAP-Rule:MF_01113]

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/m9/3m9m_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

Y-family DNA polymerases bypass Pt-GG, the cisplatin-DNA double-base lesion, contributing to the cisplatin resistance in tumour cells. To reveal the mechanism, we determined three structures of the Y-family DNA polymerase, Dpo4, in complex with Pt-GG DNA. The crystallographic snapshots show three stages of lesion bypass: the nucleotide insertions opposite the 3'G (first insertion) and 5'G (second insertion) of Pt-GG, and the primer extension beyond the lesion site. We observed a dynamic process, in which the lesion was converted from an open and angular conformation at the first insertion to a depressed and nearly parallel conformation at the subsequent reaction stages to fit into the active site of Dpo4. The DNA translocation-coupled conformational change may account for additional inhibition on the second insertion reaction. The structures illustrate that Pt-GG disturbs the replicating base pair in the active site, which reduces the catalytic efficiency and fidelity. The in vivo relevance of Dpo4-mediated Pt-GG bypass was addressed by a dpo-4 knockout strain of Sulfolobus solfataricus, which exhibits enhanced sensitivity to cisplatin and proteomic alterations consistent with genomic stress.

Structural insight into dynamic bypass of the major cisplatin-DNA adduct by Y-family polymerase Dpo4.,Wong JH, Brown JA, Suo Z, Blum P, Nohmi T, Ling H EMBO J. 2010 Jun 16;29(12):2059-69. Epub 2010 May 28. PMID:20512114<ref>PMID:20512114</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 3m9m" style="background-color:#fffaf0;"></div>

*[[DNA polymerase|DNA polymerase]]

[[Category: Atcc 35091]]

[[Category: DNA-directed DNA polymerase]]

[[Category: Ling, H]]

[[Category: Wong, J H.Y]]

[[Category: Y-family dna polymerase]]