View source for 3hbu


==PrtC methionine mutants: M226H DESY==
<StructureSection load='3hbu' size='340' side='right'caption='[[3hbu]], [[Resolution|resolution]] 1.77&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3hbu]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Dickeya_chrysanthemi Dickeya chrysanthemi] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3HBU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3HBU 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]] 1.77&#8491;</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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=3hbu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3hbu OCA], [https://pdbe.org/3hbu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3hbu RCSB], [https://www.ebi.ac.uk/pdbsum/3hbu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3hbu ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PRTC_DICCH PRTC_DICCH] 
== 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/hb/3hbu_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=3hbu ConSurf].
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== Publication Abstract from PubMed ==
Abstract The metzincins constitute a subclan of metalloproteases possessing a HEXXHXXGXXH/D zinc-binding consensus sequence where the three histidines are zinc ligands and the glutamic acid the catalytic base. A completely conserved methionine is located downstream of this motif. Families of the metzincin clan comprise, besides others, astacins, ADAMS proteases, matrix metalloproteases and serralysins. The latter are extracellular 50 kDa proteases secreted by Gram-negative bacteria via a type I secretion system. While there is a large body of structural and biochemical information available, the function of the conserved methionine has not been convincingly clarified yet. Here we present the crystal structures of a number of mutants of the serralysin member protease C with the conserved methionine being replaced by Ile, Ala and His. Together with our former report on the leucine and cysteine mutants, we demonstrate here that replacement of the methionine side chain results in an increasing distortion of the zinc-binding geometry, especially pronounced in the chi(2) angles of the first and third histidine of the consensus sequence. This is correlated with an increasing loss of proteolytic activity and a sharp increase of flexibility of large segments of the polypeptide chain.

Metzincin's canonical methionine is responsible for the structural integrity of the zinc-binding site.,Oberholzer AE, Bumann M, Hege T, Russo S, Baumann U Biol Chem. 2009 Jun 27. PMID:19558324<ref>PMID:19558324</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 3hbu" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Dickeya chrysanthemi]]
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Baumann U]]
[[Category: Bumann M]]
[[Category: Hege T]]
[[Category: Oberholzer AE]]
[[Category: Russo S]]