6as3
From Proteopedia
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==Structure of a phage anti-CRISPR protein== | ==Structure of a phage anti-CRISPR protein== | ||
| - | <StructureSection load='6as3' size='340' side='right' caption='[[6as3]], [[Resolution|resolution]] 2.00Å' scene=''> | + | <StructureSection load='6as3' size='340' side='right'caption='[[6as3]], [[Resolution|resolution]] 2.00Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[6as3]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6AS3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6AS3 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6as3]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Pseudomonas_phage_jbd5 Pseudomonas phage jbd5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6AS3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6AS3 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=6as3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6as3 OCA], [http://pdbe.org/6as3 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6as3 RCSB], [http://www.ebi.ac.uk/pdbsum/6as3 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6as3 ProSAT]</span></td></tr> | + | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">JBD5_034 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1223261 Pseudomonas phage JBD5])</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=6as3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6as3 OCA], [http://pdbe.org/6as3 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6as3 RCSB], [http://www.ebi.ac.uk/pdbsum/6as3 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6as3 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | CRISPR (clustered regularly interspaced short palindromic repeat)-Cas adaptive immune systems are prevalent defense mechanisms in bacteria and archaea. They provide sequence-specific detection and neutralization of foreign nucleic acids such as bacteriophages and plasmids. One mechanism by which phages and other mobile genetic elements are able to overcome the CRISPR-Cas system is through the expression of anti-CRISPR proteins. Over 20 different families of anti-CRISPR proteins have been described, each of which inhibits a particular type of CRISPR-Cas system. In this work, we determined the structure of type I-E anti-CRISPR protein AcrE1 by X-ray crystallography. We show that AcrE1 binds to the CRISPR-associated helicase/nuclease Cas3 and that the C-terminal region of the anti-CRISPR protein is important for its inhibitory activity. We further show that AcrE1 can convert the endogenous type I-E CRISPR system into a programmable transcriptional repressor.IMPORTANCE The CRISPR-Cas immune system provides bacteria with resistance to invasion by potentially harmful viruses, plasmids, and other foreign mobile genetic elements. This study presents the first structural and mechanistic insight into a phage-encoded protein that inactivates the type I-E CRISPR-Cas system in Pseudomonas aeruginosa The interaction of this anti-CRISPR protein with the CRISPR-associated helicase/nuclease proteins Cas3 shuts down the CRISPR-Cas system and protects phages carrying this gene from destruction. This interaction also allows the repurposing of the endogenous type I-E CRISPR system into a programmable transcriptional repressor, providing a new biotechnological tool for genetic studies of bacteria encoding this type I-E CRISPR-Cas system. | ||
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| + | Disabling a Type I-E CRISPR-Cas Nuclease with a Bacteriophage-Encoded Anti-CRISPR Protein.,Pawluk A, Shah M, Mejdani M, Calmettes C, Moraes TF, Davidson AR, Maxwell KL MBio. 2017 Dec 12;8(6). pii: mBio.01751-17. doi: 10.1128/mBio.01751-17. PMID:29233895<ref>PMID:29233895</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 6as3" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Pseudomonas phage jbd5]] | ||
[[Category: Calmettes, C]] | [[Category: Calmettes, C]] | ||
[[Category: Davidson, A R]] | [[Category: Davidson, A R]] | ||
Revision as of 08:19, 20 March 2019
Structure of a phage anti-CRISPR protein
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