1soz
From Proteopedia
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==Crystal Structure of DegS protease in complex with an activating peptide== | ==Crystal Structure of DegS protease in complex with an activating peptide== | ||
| - | <StructureSection load='1soz' size='340' side='right' caption='[[1soz]], [[Resolution|resolution]] 2.40Å' scene=''> | + | <StructureSection load='1soz' size='340' side='right'caption='[[1soz]], [[Resolution|resolution]] 2.40Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[1soz]] is a 5 chain structure with sequence from [ | + | <table><tr><td colspan='2'>[[1soz]] is a 5 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=1SOZ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SOZ 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]] 2.4Å</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=1soz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1soz OCA], [https://pdbe.org/1soz PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1soz RCSB], [https://www.ebi.ac.uk/pdbsum/1soz PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1soz ProSAT]</span></td></tr> | |
| - | <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/DEGS_ECOLI DEGS_ECOLI] When heat shock or other environmental stresses disrupt protein folding in the periplasm, DegS senses the accumulation of unassembled outer membrane porins (OMPs) and then initiates RseA (anti sigma-E factor) degradation by cleaving it in its periplasmic domain, making it an attractive substrate for subsequent cleavage by RseP. This cascade that ultimately leads to the sigma-E-driven expression of a variety of factors dealing with folding stress in the periplasm and OMP assembly.<ref>PMID:12183369</ref> <ref>PMID:19695325</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=1soz 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=1soz ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | Gram-negative bacteria respond to misfolded proteins in the cell envelope with the sigmaE-driven expression of periplasmic proteases/chaperones. Activation of sigmaE is controlled by a proteolytic cascade that is initiated by the DegS protease. DegS senses misfolded protein in the periplasm, undergoes autoactivation, and cleaves the antisigma factor RseA. Here, we present the crystal structures of three distinct states of DegS from E. coli. DegS alone exists in a catalytically inactive form. Binding of stress-signaling peptides to its PDZ domain induces a series of conformational changes that activates protease function. Backsoaking of crystals containing the DegS-activator complex revealed the presence of an active/inactive hybrid structure and demonstrated the reversibility of activation. Taken together, the structural data illustrate in molecular detail how DegS acts as a periplasmic stress sensor. Our results suggest a novel regulatory role for PDZ domains and unveil a novel mechanism of reversible protease activation. | ||
| - | + | ==See Also== | |
| - | + | *[[Proteins from Mycobacterium tuberculosis|Proteins from Mycobacterium tuberculosis]] | |
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== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: | + | [[Category: Escherichia coli]] |
| - | [[Category: Clausen | + | [[Category: Large Structures]] |
| - | [[Category: Ehrmann | + | [[Category: Clausen T]] |
| - | [[Category: Kitzing | + | [[Category: Ehrmann M]] |
| - | [[Category: Kurzbauer | + | [[Category: Kitzing K]] |
| - | [[Category: Wilken | + | [[Category: Kurzbauer R]] |
| - | + | [[Category: Wilken C]] | |
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Current revision
Crystal Structure of DegS protease in complex with an activating peptide
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