3k9j
From Proteopedia
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<StructureSection load='3k9j' size='340' side='right'caption='[[3k9j]], [[Resolution|resolution]] 1.90Å' scene=''> | <StructureSection load='3k9j' size='340' side='right'caption='[[3k9j]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[3k9j]] is a 2 chain structure with sequence from [ | + | <table><tr><td colspan='2'>[[3k9j]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3K9J OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3K9J FirstGlance]. <br> |
| - | </td></tr><tr id=' | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.903Å</td></tr> |
| - | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene></td></tr> | |
| - | <tr id=' | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3k9j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3k9j OCA], [https://pdbe.org/3k9j PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3k9j RCSB], [https://www.ebi.ac.uk/pdbsum/3k9j PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3k9j ProSAT]</span></td></tr> |
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| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | + | |
</table> | </table> | ||
== Function == | == Function == | ||
| - | [ | + | [https://www.uniprot.org/uniprot/SETMR_HUMAN SETMR_HUMAN] Histone methyltransferase that methylates 'Lys-4' and 'Lys-36' of histone H3, 2 specific tags for epigenetic transcriptional activation. Specifically mediates dimethylation of H3 'Lys-36'. Has sequence-specific DNA-binding activity and recognizes the 19-mer core of the 5'-terminal inverted repeats (TIRs) of the Hsmar1 element. Has DNA nicking activity. Has in vivo end joining activity and may mediate genomic integration of foreign DNA.<ref>PMID:16332963</ref> <ref>PMID:16672366</ref> <ref>PMID:17877369</ref> <ref>PMID:17403897</ref> |
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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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=3k9j ConSurf]. | </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=3k9j ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | Although the human genome is littered with sequences derived from the Hsmar1 transposon, the only intact Hsmar1 transposase gene exists within a chimeric SET-transposase fusion protein referred to as Metnase or SETMAR. Metnase retains many of the transposase activities including terminal inverted repeat (TIR) specific DNA-binding activity, DNA cleavage activity, albeit uncoupled from TIR-specific binding, and the ability to form a synaptic complex. However, Metnase has evolved as a DNA repair protein that is specifically involved in nonhomologous end joining. Here, we present two crystal structures of the transposase catalytic domain of Metnase revealing a dimeric enzyme with unusual active site plasticity that may be involved in modulating metal binding. We show through characterization of a dimerization mutant, F460K, that the dimeric form of the enzyme is required for its DNA cleavage, DNA-binding, and nonhomologous end joining activities. Of significance is the conservation of F460 along with residues that we propose may be involved in the modulation of metal binding in both the predicted ancestral Hsmar1 transposase sequence as well as in the modern enzyme. The Metnase transposase has been remarkably conserved through evolution; however, there is a clustering of substitutions located in alpha helices 4 and 5 within the putative DNA-binding site, consistent with loss of transposition specific DNA cleavage activity and acquisition of DNA repair specific cleavage activity. | ||
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| - | Crystal structure of the human Hsmar1-derived transposase domain in the DNA repair enzyme Metnase.,Goodwin KD, He H, Imasaki T, Lee SH, Georgiadis MM Biochemistry. 2010 Jul 13;49(27):5705-13. PMID:20521842<ref>PMID:20521842</ref> | ||
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| - | </div> | ||
| - | <div class="pdbe-citations 3k9j" style="background-color:#fffaf0;"></div> | ||
==See Also== | ==See Also== | ||
| - | *[[Histone methyltransferase|Histone methyltransferase]] | + | *[[Histone methyltransferase 3D structures|Histone methyltransferase 3D structures]] |
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: | + | [[Category: Homo sapiens]] |
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[[Category: Large Structures]] | [[Category: Large Structures]] | ||
| - | [[Category: Georgiadis | + | [[Category: Georgiadis MM]] |
| - | [[Category: Goodwin | + | [[Category: Goodwin KD]] |
| - | [[Category: He | + | [[Category: He H]] |
| - | [[Category: Imasaki | + | [[Category: Imasaki T]] |
| - | [[Category: Lee | + | [[Category: Lee S-H]] |
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Current revision
Transposase domain of Metnase
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