1mus

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(New page: 200px<br /> <applet load="1mus" size="450" color="white" frame="true" align="right" spinBox="true" caption="1mus, resolution 1.90&Aring;" /> '''crystal structure o...)
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[[Image:1mus.gif|left|200px]]<br />
 
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<applet load="1mus" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1mus, resolution 1.90&Aring;" />
 
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'''crystal structure of Tn5 transposase complexed with resolved outside end DNA'''<br />
 
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==Overview==
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==crystal structure of Tn5 transposase complexed with resolved outside end DNA==
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Prokaryotic transposon 5 (Tn5) serves as a model system for studying the, molecular mechanism of DNA transposition. Elucidation of the X-ray, co-crystal structure of Tn5 transposase complexed with a DNA recognition, end sequence provided the first three-dimensional picture of an, intermediate in a transposition/retroviral integration pathway. The many, Tn5 transposase-DNA co-crystal structures now available complement, biochemical and genetic studies, allowing a comprehensive and detailed, understanding of transposition mechanisms. Specifically, the structures, reveal two different types of protein-DNA contacts: cis contacts, required, for initial DNA recognition, and trans contacts, required for catalysis., Protein-protein contacts required for synapsis are also seen. Finally, the, two divalent metals in the active site of the transposase support a, 'two-metal-ion' mechanism for Tn5 transposition.
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<StructureSection load='1mus' size='340' side='right'caption='[[1mus]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1mus]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. The December 2006 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Transposase'' by David S. Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2006_12 10.2210/rcsb_pdb/mom_2006_12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MUS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MUS FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></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=1mus FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mus OCA], [https://pdbe.org/1mus PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mus RCSB], [https://www.ebi.ac.uk/pdbsum/1mus PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mus ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/TN5P_ECOLX TN5P_ECOLX] Mediates transposition of transposon Tn5 by a 'cut and paste' mechanism. First, the monomeric transposase binds the 19 bp inverted DNA repeats flanking the transposon. Then, dimerization of the DNA-bound transposase creates a synaptic DNA complex. After nicking of the first DNA strand, excision of the transposon proceeds through a series of intermediates. The transposase then mediates the insertion of the transposon at a new site by strand transfer. The activity of the wild-type transposase is very low, and is further inhibited by dimerization with the transposase inhibitor (inh).<ref>PMID:6260374</ref> <ref>PMID:6291786</ref> <ref>PMID:6303899</ref> <ref>PMID:1310499</ref> <ref>PMID:8226636</ref> <ref>PMID:8871560</ref> <ref>PMID:11877443</ref> <ref>PMID:12367522</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/mu/1mus_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=1mus ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1MUS is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with MN, MG and EDO as [http://en.wikipedia.org/wiki/ligands ligands]. The following page contains interesting information on the relation of 1MUS with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb84_1.html Transposase]]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1MUS OCA].
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*[[Transposase 3D structures|Transposase 3D structures]]
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== References ==
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==Reference==
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<references/>
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Structure/function insights into Tn5 transposition., Steiniger-White M, Rayment I, Reznikoff WS, Curr Opin Struct Biol. 2004 Feb;14(1):50-7. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15102449 15102449]
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__TOC__
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</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: RCSB PDB Molecule of the Month]]
[[Category: Transposase]]
[[Category: Transposase]]
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[[Category: Holden, H.M.]]
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[[Category: Holden HM]]
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[[Category: Lovell, S.]]
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[[Category: Lovell S]]
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[[Category: Rayment, I.]]
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[[Category: Rayment I]]
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[[Category: Reznikoff, W.S.]]
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[[Category: Reznikoff WS]]
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[[Category: Steiniger-White, M.]]
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[[Category: Steiniger-White M]]
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[[Category: Thoden, J.B.]]
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[[Category: Thoden JB]]
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[[Category: EDO]]
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[[Category: MG]]
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[[Category: MN]]
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[[Category: dna binding]]
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[[Category: hairpin]]
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[[Category: transposase]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Sun Nov 18 09:03:57 2007''
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Current revision

crystal structure of Tn5 transposase complexed with resolved outside end DNA

PDB ID 1mus

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