View source for 1umu


==STRUCTURE DETERMINATION OF UMUD' BY MAD PHASING OF THE SELENOMETHIONYL PROTEIN==
<StructureSection load='1umu' size='340' side='right'caption='[[1umu]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1umu]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UMU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1UMU FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1umu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1umu OCA], [https://pdbe.org/1umu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1umu RCSB], [https://www.ebi.ac.uk/pdbsum/1umu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1umu ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/UMUD_ECOLI UMUD_ECOLI] Involved in UV protection and mutation. Essential for induced (or SOS) mutagenesis. May modify the DNA replication machinery to allow bypass synthesis across a damaged template.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/um/1umu_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1umu ConSurf].
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== Publication Abstract from PubMed ==
For life to be sustained, mistakes in DNA repair must be tolerated when damage obscures the genetic information. In bacteria such as Escherichia coli, DNA damage elicits the well regulated 'SOS response'. For the extreme case of damage that cannot be repaired by conventional enzymes, there are proteins that allow the replication of DNA through such lesions, but with a reduction in the fidelity of replication. Essential proteins in this mutagenic process are RecA, DNA polymerase III, UmuD, UmuD' and UmuC (umu: UV mutagenesis). Regulation of this response involves a RecA-mediated self-cleavage of UmuD to produce UmuD'. To understand this system in more detail, we have determined the crystal structure of the E. coli UmuD' mutagenesis protein at 2.5 A resolution. Globular heads folded in an unusual Beta-structure associate to form molecular dimers, and extended amino-terminal tails associate to produce crystallized filaments. The structure provides insight into the mechanism of the self-cleavage reaction that UmuD-like proteins undergo as part of the global SOS response.

Structure of the UmuD' protein and its regulation in response to DNA damage.,Peat TS, Frank EG, McDonald JP, Levine AS, Woodgate R, Hendrickson WA Nature. 1996 Apr 25;380(6576):727-30. PMID:8614470<ref>PMID:8614470</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 1umu" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Escherichia coli]]
[[Category: Large Structures]]
[[Category: Hendrickson WA]]
[[Category: Peat TS]]