3btz

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[[Image:3btz.png|left|200px]]
 
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{{STRUCTURE_3btz| PDB=3btz | SCENE= }}
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==Crystal structure of human ABH2 cross-linked to dsDNA==
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<StructureSection load='3btz' size='340' side='right'caption='[[3btz]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3btz]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3BTZ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3BTZ FirstGlance]. <br>
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</td></tr><tr id='NonStdRes'><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 id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2fd8|2fd8]], [[2iuw|2iuw]], [[3btx|3btx]], [[3bty|3bty]], [[3bu0|3bu0]], [[3buc|3buc]]</div></td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ALKBH2, ABH2 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3btz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3btz OCA], [https://pdbe.org/3btz PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3btz RCSB], [https://www.ebi.ac.uk/pdbsum/3btz PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3btz ProSAT]</span></td></tr>
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</table>
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== Function ==
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[[https://www.uniprot.org/uniprot/ALKB2_HUMAN ALKB2_HUMAN]] Dioxygenase that repairs alkylated DNA and RNA containing 1-methyladenine and 3-methylcytosine by oxidative demethylation. Can also repair alkylated DNA containing 1-ethenoadenine (in vitro). Has strong preference for double-stranded DNA. Has low efficiency with single-stranded substrates. Requires molecular oxygen, alpha-ketoglutarate and iron.<ref>PMID:12486230</ref> <ref>PMID:12594517</ref> <ref>PMID:16174769</ref> <ref>PMID:18519673</ref> <ref>PMID:18432238</ref>
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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/bt/3btz_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/main_output.php?pdb_ID=3btz 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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===Crystal structure of human ABH2 cross-linked to dsDNA===
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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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{{ABSTRACT_PUBMED_18432238}}
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 3btz" style="background-color:#fffaf0;"></div>
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==About this Structure==
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==See Also==
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[[3btz]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3BTZ OCA].
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*[[Dioxygenase 3D structures|Dioxygenase 3D structures]]
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:018432238</ref><references group="xtra"/>
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__TOC__
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[[Category: Homo sapiens]]
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</StructureSection>
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[[Category: He, C.]]
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[[Category: Human]]
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[[Category: Yang, C G.]]
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[[Category: Large Structures]]
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[[Category: Yi, C.]]
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[[Category: He, C]]
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[[Category: Yang, C G]]
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[[Category: Yi, C]]
[[Category: Cross-link]]
[[Category: Cross-link]]
[[Category: Dna damage]]
[[Category: Dna damage]]

Current revision

Crystal structure of human ABH2 cross-linked to dsDNA

PDB ID 3btz

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