4oo8: Difference between revisions
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<StructureSection load='4oo8' size='340' side='right'caption='[[4oo8]], [[Resolution|resolution]] 2.50Å' scene=''> | <StructureSection load='4oo8' size='340' side='right'caption='[[4oo8]], [[Resolution|resolution]] 2.50Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4oo8]] is a 6 chain structure with sequence from [ | <table><tr><td colspan='2'>[[4oo8]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_pyogenes_serotype_M1 Streptococcus pyogenes serotype M1]. The January 2015 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Cascade and CRISPR'' by David Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2015_1 10.2210/rcsb_pdb/mom_2015_1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4OO8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4OO8 FirstGlance]. <br> | ||
</td></tr> | </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=4oo8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4oo8 OCA], [https://pdbe.org/4oo8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4oo8 RCSB], [https://www.ebi.ac.uk/pdbsum/4oo8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4oo8 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/CAS9_STRP1 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.<ref>PMID:21455174</ref> <ref>PMID:22745249</ref> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
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==See Also== | ==See Also== | ||
*[[CRISPR-Cas9|CRISPR-Cas9]] | *[[CRISPR-Cas9|CRISPR-Cas9]] | ||
*[[Endonuclease 3D structures|Endonuclease 3D structures]] | *[[Endonuclease 3D structures|Endonuclease 3D structures]] | ||
== References == | == References == | ||
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[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: RCSB PDB Molecule of the Month]] | [[Category: RCSB PDB Molecule of the Month]] | ||
[[Category: | [[Category: Streptococcus pyogenes serotype M1]] | ||
[[Category: Ishitani | [[Category: Ishitani R]] | ||
[[Category: Nishimasu | [[Category: Nishimasu H]] | ||
[[Category: Nureki | [[Category: Nureki O]] | ||
Revision as of 10:35, 25 January 2023
Crystal structure of Streptococcus pyogenes Cas9 in complex with guide RNA and target DNACrystal structure of Streptococcus pyogenes Cas9 in complex with guide RNA and target DNA
Structural highlights
FunctionCAS9_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 PubMedThe CRISPR-associated endonuclease Cas9 can be targeted to specific genomic loci by single guide RNAs (sgRNAs). Here, we report the crystal structure of Streptococcus pyogenes Cas9 in complex with sgRNA and its target DNA at 2.5 A resolution. The structure revealed a bilobed architecture composed of target recognition and nuclease lobes, accommodating the sgRNA:DNA heteroduplex in a positively charged groove at their interface. Whereas the recognition lobe is essential for binding sgRNA and DNA, the nuclease lobe contains the HNH and RuvC nuclease domains, which are properly positioned for cleavage of the complementary and noncomplementary strands of the target DNA, respectively. The nuclease lobe also contains a carboxyl-terminal domain responsible for the interaction with the protospacer adjacent motif (PAM). This high-resolution structure and accompanying functional analyses have revealed the molecular mechanism of RNA-guided DNA targeting by Cas9, thus paving the way for the rational design of new, versatile genome-editing technologies. Crystal structure of Cas9 in complex with guide RNA and target DNA.,Nishimasu H, Ran FA, Hsu PD, Konermann S, Shehata SI, Dohmae N, Ishitani R, Zhang F, Nureki O Cell. 2014 Feb 27;156(5):935-49. doi: 10.1016/j.cell.2014.02.001. Epub 2014 Feb, 13. PMID:24529477[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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