9k4f

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Current revision (09:14, 22 October 2025) (edit) (undo)
 
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'''Unreleased structure'''
 
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The entry 9k4f is ON HOLD until Paper Publication
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==SuperFi Cas9 - mismatch 22nt sgRNA - DNA ternary complex class2==
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<StructureSection load='9k4f' size='340' side='right'caption='[[9k4f]], [[Resolution|resolution]] 3.27&Aring;' scene=''>
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Authors: Zheng, R., Ma, L.J.
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== Structural highlights ==
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<table><tr><td colspan='2'>[[9k4f]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_pyogenes Streptococcus pyogenes] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9K4F OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9K4F FirstGlance]. <br>
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Description: SuperFi Cas9 -mismatch 22nt sgRNA -DNA ternary complex class2
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.27&#8491;</td></tr>
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[[Category: Unreleased Structures]]
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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=9k4f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9k4f OCA], [https://pdbe.org/9k4f PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9k4f RCSB], [https://www.ebi.ac.uk/pdbsum/9k4f PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9k4f ProSAT]</span></td></tr>
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[[Category: Zheng, R]]
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</table>
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[[Category: Ma, L.J]]
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== Function ==
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[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>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
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[[Category: Streptococcus pyogenes]]
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[[Category: Synthetic construct]]
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[[Category: Ma LJ]]
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[[Category: Zheng R]]

Current revision

SuperFi Cas9 - mismatch 22nt sgRNA - DNA ternary complex class2

PDB ID 9k4f

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