1ukf

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Revision as of 08:30, 11 September 2015

Crystal Structure of Pseudomonas Avirulence Protein AvrPphB

Structural highlights

1ukf is a 1 chain structure with sequence from Psesh. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[AVRP3_PSESH] Cysteine protease avirulence protein, which is essential during infection of plant cells from cultivar-specific of beans and Arabidopsis thaliana. The autocleavage of the protein is required for virulence function. May act by affecting the plant defense system. In plants lacking R3 or RPS5 resistance genes, it probably impairs the plant defense system and leads to the bacteria multiplication. In contrast, in plants containing the R3 or RPS5 protein, it is unable to induce disease symptoms, explaining its avirulence name. The 7 kDa product is required for the type-III translocation from Pseudomonas strains to the plant, but are partially dispensable for effector recognition following in planta expression. In infected plants, it probably acts by cleaving the PBS1 protein, which may lead to resistance or disease, depending on the presence or absence of RPS5, respectively.^[1]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

AvrPphB is an avirulence (Avr) protein from the plant pathogen Pseudomonas syringae that can trigger a disease-resistance response in a number of host plants including Arabidopsis. AvrPphB belongs to a novel family of cysteine proteases with the charter member of this family being the Yersinia effector protein YopT. AvrPphB has a very stringent substrate specificity, catalyzing a single proteolytic cleavage in the Arabidopsis serine/threonine kinase PBS1. We have determined the crystal structure of AvrPphB by x-ray crystallography at 1.35-A resolution. The structure is composed of a central antiparallel beta-sheet, with alpha-helices packing on both sides of the sheet to form a two-lobe structure. The core of this structure resembles the papain-like cysteine proteases. The similarity includes the AvrPphB active site catalytic triad of Cys-98, His-212, and Asp-227 and the oxyanion hole residue Asn-93. Based on analogy with inhibitor complexes of the papain-like proteases, we propose a model for the substrate-binding mechanism of AvrPphB. A deep and positively charged pocket (S2) and a neighboring shallow surface (S3) likely bind to aspartic acid and glycine residues in the substrate located two (P2) and three (P3) residues N terminal to the cleavage site, respectively. Further implications about the specificity of plant pathogen recognition are also discussed.

The crystal structure of Pseudomonas avirulence protein AvrPphB: a papain-like fold with a distinct substrate-binding site.,Zhu M, Shao F, Innes RW, Dixon JE, Xu Z Proc Natl Acad Sci U S A. 2004 Jan 6;101(1):302-7. Epub 2003 Dec 23. PMID:14694194^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Tampakaki AP, Bastaki M, Mansfield JW, Panopoulos NJ. Molecular determinants required for the avirulence function of AvrPphB in bean and other plants. Mol Plant Microbe Interact. 2002 Mar;15(3):292-300. PMID:11952132 doi:http://dx.doi.org/10.1094/MPMI.2002.15.3.292
↑ Zhu M, Shao F, Innes RW, Dixon JE, Xu Z. The crystal structure of Pseudomonas avirulence protein AvrPphB: a papain-like fold with a distinct substrate-binding site. Proc Natl Acad Sci U S A. 2004 Jan 6;101(1):302-7. Epub 2003 Dec 23. PMID:14694194 doi:10.1073/pnas.2036536100

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1ukf"

@@ Line 2: / Line 2: @@
 <StructureSection load='1ukf' size='340' side='right' caption='[[1ukf]], [[Resolution|resolution]] 1.35&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1ukf]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Pseudomonas_syringae_pv._phaseolicola Pseudomonas syringae pv. phaseolicola]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UKF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1UKF FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1ukf]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Psesh Psesh]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UKF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1UKF FirstGlance]. <br>
-</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ukf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ukf OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ukf RCSB], [http://www.ebi.ac.uk/pdbsum/1ukf PDBsum]</span></td></tr>
+</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ukf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ukf OCA], [http://pdbe.org/1ukf PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ukf RCSB], [http://www.ebi.ac.uk/pdbsum/1ukf PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 25: / Line 25: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1ukf" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 32: / Line 33: @@
 __TOC__
 </StructureSection>
-[[Category: Pseudomonas syringae pv. phaseolicola]]
+[[Category: Psesh]]
 [[Category: Dixon, J E]]
 [[Category: Innes, R W]]

1ukf

From Proteopedia

Revision as of 08:30, 11 September 2015

Crystal Structure of Pseudomonas Avirulence Protein AvrPphB

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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