5vw1

From Proteopedia

(Difference between revisions)

Revision as of 09:41, 1 January 2020

Crystal structure of SpyCas9-sgRNA-AcrIIA4 ternary complex

Structural highlights

5vw1 is a 3 chain structure with sequence from Lismm and Strp1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , ,
Gene:	cas9, csn1, SPy_1046 (STRP1), LMM7_0114 (LISMM)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CAS9_STRP1] 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 spacers, sequences complementary to antecedent mobile elements, and target invading nucleic acids. CRISPR clusters are transcribed and processed into CRISPR RNA (crRNA) (Probable). In type II CRISPR systems correct processing of pre-crRNA requires a trans-encoded small RNA (tracrRNA), endogenous ribonuclease 3 (rnc) and this protein. The tracrRNA serves as a guide for ribonuclease 3-aided processing of pre-crRNA. Subsequently Cas9/crRNA/tracrRNA endonucleolytically cleaves linear or circular dsDNA target complementary to the spacer. The target strand not complementary to crRNA is first cut endonucleolytically, then trimmed by 3'-5' exonucleolytically. DNA-binding requires protein and both RNA species. Cas9 probably recognizes a short motif in the CRISPR repeat sequences (the PAM or protospacer adjacent motif) to help distinguish self versus nonself.^[1] ^[2]

Publication Abstract from PubMed

Prokaryotic CRISPR-Cas adaptive immune systems utilize sequence-specific RNA-guided endonucleases to defend against infection by viruses, bacteriophages, and mobile elements, while these foreign genetic elements evolve diverse anti-CRISPR proteins to overcome the CRISPR-Cas-mediated defense of the host. Recently, AcrIIA2 and AcrIIA4, encoded by Listeria monocytogene prophages, were shown to block the endonuclease activity of type II-A Streptococcus pyogene Cas9 (SpyCas9). We now report the crystal structure of AcrIIA4 in complex with single-guide RNA-bound SpyCas9, thereby establishing that AcrIIA4 preferentially targets critical residues essential for PAM duplex recognition, as well as blocks target DNA access to key catalytic residues lining the RuvC pocket. These structural insights, validated by biochemical assays on key mutants, demonstrate that AcrIIA4 competitively occupies both PAM-interacting and non-target DNA strand cleavage catalytic pockets. Our studies provide insights into anti-CRISPR-mediated suppression mechanisms for inactivating SpyCas9, thereby broadening the applicability of CRISPR-Cas regulatory tools for genome editing.

Inhibition Mechanism of an Anti-CRISPR Suppressor AcrIIA4 Targeting SpyCas9.,Yang H, Patel DJ Mol Cell. 2017 Jul 6;67(1):117-127.e5. doi: 10.1016/j.molcel.2017.05.024. Epub, 2017 Jun 9. PMID:28602637^[3]

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

References

↑ Deltcheva E, Chylinski K, Sharma CM, Gonzales K, Chao Y, Pirzada ZA, Eckert MR, Vogel J, Charpentier E. CRISPR RNA maturation by trans-encoded small RNA and host factor RNase III. Nature. 2011 Mar 31;471(7340):602-7. doi: 10.1038/nature09886. PMID:21455174 doi:http://dx.doi.org/10.1038/nature09886
↑ Jinek M, Chylinski K, Fonfara I, Hauer M, Doudna JA, Charpentier E. A programmable dual-RNA-guided DNA endonuclease in adaptive bacterial immunity. Science. 2012 Aug 17;337(6096):816-21. doi: 10.1126/science.1225829. Epub 2012, Jun 28. PMID:22745249 doi:http://dx.doi.org/10.1126/science.1225829
↑ Yang H, Patel DJ. Inhibition Mechanism of an Anti-CRISPR Suppressor AcrIIA4 Targeting SpyCas9. Mol Cell. 2017 Jul 6;67(1):117-127.e5. doi: 10.1016/j.molcel.2017.05.024. Epub, 2017 Jun 9. PMID:28602637 doi:http://dx.doi.org/10.1016/j.molcel.2017.05.024

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5vw1"

@@ Line 1: / Line 1: @@
 ==Crystal structure of SpyCas9-sgRNA-AcrIIA4 ternary complex==
-<StructureSection load='5vw1' size='340' side='right' caption='[[5vw1]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
+<StructureSection load='5vw1' size='340' side='right'caption='[[5vw1]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5vw1]] is a 3 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5VW1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5VW1 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5vw1]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Lismm Lismm] and [http://en.wikipedia.org/wiki/Strp1 Strp1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5VW1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5VW1 FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene></td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">cas9, csn1, SPy_1046 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=301447 STRP1]), LMM7_0114 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1030009 LISMM])</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=5vw1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5vw1 OCA], [http://pdbe.org/5vw1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5vw1 RCSB], [http://www.ebi.ac.uk/pdbsum/5vw1 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5vw1 ProSAT]</span></td></tr>
 </table>
@@ Line 18: / Line 19: @@
 </div>
 <div class="pdbe-citations 5vw1" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Endonuclease 3D structures|Endonuclease 3D structures]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
+[[Category: Lismm]]
+[[Category: Strp1]]
 [[Category: Patel, D J]]
 [[Category: Yang, H]]
 [[Category: Hydrolase]]
 [[Category: Type ii crispr-cas endonculease: cas9: structure: endonuclease: anti-crispr protein: inhibition of cas9: ruvc catalytic pocket: sequence-specific pam recognition: genome editing tool]]

5vw1

From Proteopedia

Revision as of 09:41, 1 January 2020

Crystal structure of SpyCas9-sgRNA-AcrIIA4 ternary complex

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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