5fcl

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==Crystal structure of Cas1 from Pectobacterium atrosepticum==
==Crystal structure of Cas1 from Pectobacterium atrosepticum==
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<StructureSection load='5fcl' size='340' side='right' caption='[[5fcl]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
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<StructureSection load='5fcl' size='340' side='right'caption='[[5fcl]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[5fcl]] is a 6 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5FCL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5FCL FirstGlance]. <br>
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<table><tr><td colspan='2'>[[5fcl]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Pectobacterium_atrosepticum_SCRI1043 Pectobacterium atrosepticum SCRI1043]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5FCL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5FCL FirstGlance]. <br>
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</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=5fcl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5fcl OCA], [http://pdbe.org/5fcl PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5fcl RCSB], [http://www.ebi.ac.uk/pdbsum/5fcl PDBsum]</span></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.7&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5fcl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5fcl OCA], [https://pdbe.org/5fcl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5fcl RCSB], [https://www.ebi.ac.uk/pdbsum/5fcl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5fcl ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
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[[http://www.uniprot.org/uniprot/CAS1_PECAS CAS1_PECAS]] CRISPR (clustered regularly interspaced short palindromic repeat), is an adaptive immune system that provides protection against mobile genetic elements (viruses, transposable elements and conjugative plasmids). CRISPR clusters contain sequences complementary to antecedent mobile elements and target invading nucleic acids. CRISPR clusters are transcribed and processed into CRISPR RNA (crRNA). Acts as a dsDNA endonuclease. Involved in the integration of spacer DNA into the CRISPR cassette (By similarity).<ref>PMID:23637624</ref>
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[https://www.uniprot.org/uniprot/CAS1_PECAS CAS1_PECAS] CRISPR (clustered regularly interspaced short palindromic repeat), is an adaptive immune system that provides protection against mobile genetic elements (viruses, transposable elements and conjugative plasmids). CRISPR clusters contain sequences complementary to antecedent mobile elements and target invading nucleic acids. CRISPR clusters are transcribed and processed into CRISPR RNA (crRNA). Acts as a dsDNA endonuclease. Involved in the integration of spacer DNA into the CRISPR cassette (By similarity).<ref>PMID:23637624</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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CRISPR-Cas systems are adaptive immune systems in prokaryotes that provide protection against viruses and other foreign DNA. In the adaptation stage, foreign DNA is integrated into CRISPR (clustered regularly interspaced short palindromic repeat) arrays as new spacers. These spacers are used in the interference stage to guide effector CRISPR associated (Cas) protein(s) to target complementary foreign invading DNA. Cas1 is the integrase enzyme that is central to the catalysis of spacer integration. There are many diverse types of CRISPR-Cas systems, including type I-F systems, which are typified by a unique Cas1-Cas2-3 adaptation complex. In the present study we characterize the Cas1 protein of the potato phytopathogenPectobacterium atrosepticum, an important model organism for understanding spacer acquisition in type I-F CRISPR-Cas systems. We demonstrate by mutagenesis that Cas1 is essential for adaptationin vivoand requires a conserved aspartic acid residue. By X-ray crystallography, we show that althoughP. atrosepticumCas1 adopts a fold conserved among other Cas1 proteins, it possesses remarkable asymmetry as a result of structural plasticity. In particular, we resolve for the first time a flexible, asymmetric loop that may be unique to type I-F Cas1 proteins, and we discuss the implications of these structural features for DNA binding and enzymatic activity.
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Structural plasticity and in vivo activity of Cas1 from the type I-F CRISPR-Cas system.,Wilkinson ME, Nakatani Y, Staals RH, Kieper SN, Opel-Reading HK, McKenzie RE, Fineran PC, Krause KL Biochem J. 2016 Apr 15;473(8):1063-72. doi: 10.1042/BCJ20160078. Epub 2016 Feb, 29. PMID:26929403<ref>PMID:26929403</ref>
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==See Also==
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*[[Endonuclease 3D structures|Endonuclease 3D structures]]
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 5fcl" style="background-color:#fffaf0;"></div>
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== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Fineran, P C]]
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[[Category: Large Structures]]
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[[Category: Krause, K L]]
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[[Category: Pectobacterium atrosepticum SCRI1043]]
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[[Category: Nakatani, Y]]
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[[Category: Fineran PC]]
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[[Category: Opel-Reading, H K]]
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[[Category: Krause KL]]
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[[Category: Wilkinson, M E]]
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[[Category: Nakatani Y]]
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[[Category: Adaptation]]
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[[Category: Opel-Reading HK]]
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[[Category: Asymmetry]]
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[[Category: Wilkinson ME]]
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[[Category: Bacteriophage]]
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[[Category: Ca]]
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[[Category: Crispr]]
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[[Category: Dna binding protein]]
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[[Category: Horizontal gene transfer]]
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[[Category: Integrase]]
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[[Category: Plasmid]]
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[[Category: Structural plasticity]]
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Current revision

Crystal structure of Cas1 from Pectobacterium atrosepticum

PDB ID 5fcl

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