3bkz

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[[Image:3bkz.png|left|200px]]
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==X-ray structure of E coli AlkB crosslinked to dsDNA in the active site==
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<StructureSection load='3bkz' size='340' side='right' caption='[[3bkz]], [[Resolution|resolution]] 1.65&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3bkz]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3BKZ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3BKZ FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AKG:2-OXOGLUTARIC+ACID'>AKG</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene><br>
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<tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=2YR:2-DEOXY-N-(2-SULFANYLETHYL)CYTIDINE+5-(DIHYDROGEN+PHOSPHATE)'>2YR</scene></td></tr>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2fd8|2fd8]], [[2qxq|2qxq]]</td></tr>
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<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">alkB, aidD ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3bkz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3bkz OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3bkz RCSB], [http://www.ebi.ac.uk/pdbsum/3bkz PDBsum]</span></td></tr>
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<table>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bk/3bkz_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Escherichia coli AlkB and its human homologues ABH2 and ABH3 repair DNA/RNA base lesions by using a direct oxidative dealkylation mechanism. ABH2 has the primary role of guarding mammalian genomes against 1-meA damage by repairing this lesion in double-stranded DNA (dsDNA), whereas AlkB and ABH3 preferentially repair single-stranded DNA (ssDNA) lesions and can repair damaged bases in RNA. Here we show the first crystal structures of AlkB-dsDNA and ABH2-dsDNA complexes, stabilized by a chemical cross-linking strategy. This study reveals that AlkB uses an unprecedented base-flipping mechanism to access the damaged base: it squeezes together the two bases flanking the flipped-out one to maintain the base stack, explaining the preference of AlkB for repairing ssDNA lesions over dsDNA ones. In addition, the first crystal structure of ABH2, presented here, provides a structural basis for designing inhibitors of this human DNA repair protein.
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{{STRUCTURE_3bkz| PDB=3bkz | SCENE= }}
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Crystal structures of DNA/RNA repair enzymes AlkB and ABH2 bound to dsDNA.,Yang CG, Yi C, Duguid EM, Sullivan CT, Jian X, Rice PA, He C Nature. 2008 Apr 24;452(7190):961-5. PMID:18432238<ref>PMID:18432238</ref>
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===X-ray structure of E coli AlkB crosslinked to dsDNA in the active site===
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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</div>
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{{ABSTRACT_PUBMED_18432238}}
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== References ==
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<references/>
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==About this Structure==
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__TOC__
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[[3bkz]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli_k-12 Escherichia coli k-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3BKZ OCA].
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</StructureSection>
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[[Category: Ecoli]]
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==Reference==
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<ref group="xtra">PMID:018432238</ref><references group="xtra"/>
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[[Category: Escherichia coli k-12]]
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[[Category: He, C.]]
[[Category: He, C.]]
[[Category: Yang, C G.]]
[[Category: Yang, C G.]]

Revision as of 07:14, 28 May 2014

X-ray structure of E coli AlkB crosslinked to dsDNA in the active site

3bkz, resolution 1.65Å

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