This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

2y8w

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 12:39, 22 July 2020

Structure of CRISPR endoribonuclease Cse3 bound to 20 nt RNA

Structural highlights

2y8w is a 2 chain structure with sequence from Thet8. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1wj9, 2y8y, 2y9h
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CAS6_THET8] 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). This enzyme processes pre-crRNA into individual crRNA units, but may not actually undergo enzyme turnover, retaining the crRNA product (PubMed:21572442). Generates a 2',3'-cyclic phosphodiester.^[1] ^[2]

Publication Abstract from PubMed

Clustered regularly interspaced short palindromic repeat (CRISPR) chromosomal loci found in prokaryotes provide an adaptive immune system against bacteriophages and plasmids. CRISPR-specific endoRNases produce short RNA molecules (crRNAs) from CRISPR transcripts, which harbor sequences complementary to invasive nucleic acid elements and ensure their selective targeting by CRISPR-associated (Cas) proteins. The extreme sequence divergence of CRISPR-specific endoRNases and their RNA substrates has obscured homology-based comparison of RNA recognition and cleavage mechanisms. Here, we show that Cse3 type CRISPR-specific endoRNases bind a hairpin structure and residues downstream of the cleavage site within the repetitive segment of cognate CRISPR RNA. Cocrystal structures of Cse3-RNA complexes reveal an RNA-induced conformational change in the enzyme active site that aligns the RNA strand for site-specific cleavage. These studies provide insight into a catalytically essential RNA recognition mechanism by a large class of CRISPR-related endoRNases.

An RNA-induced conformational change required for CRISPR RNA cleavage by the endoribonuclease Cse3.,Sashital DG, Jinek M, Doudna JA Nat Struct Mol Biol. 2011 Jun;18(6):680-7. Epub 2011 May 15. PMID:21572442^[3]

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

References

↑ Sashital DG, Jinek M, Doudna JA. An RNA-induced conformational change required for CRISPR RNA cleavage by the endoribonuclease Cse3. Nat Struct Mol Biol. 2011 Jun;18(6):680-7. Epub 2011 May 15. PMID:21572442 doi:10.1038/nsmb.2043
↑ Gesner EM, Schellenberg MJ, Garside EL, George MM, Macmillan AM. Recognition and maturation of effector RNAs in a CRISPR interference pathway. Nat Struct Mol Biol. 2011 May 15. PMID:21572444 doi:10.1038/nsmb.2042
↑ Sashital DG, Jinek M, Doudna JA. An RNA-induced conformational change required for CRISPR RNA cleavage by the endoribonuclease Cse3. Nat Struct Mol Biol. 2011 Jun;18(6):680-7. Epub 2011 May 15. PMID:21572442 doi:10.1038/nsmb.2043

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/2y8w"

@@ Line 1: / Line 1: @@
 ==Structure of CRISPR endoribonuclease Cse3 bound to 20 nt RNA==
-<StructureSection load='2y8w' size='340' side='right' caption='[[2y8w]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
+<StructureSection load='2y8w' size='340' side='right'caption='[[2y8w]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2y8w]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Thet8 Thet8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Y8W OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2Y8W FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2y8w]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Thet8 Thet8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Y8W OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=2Y8W FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1wj9|1wj9]], [[2y8y|2y8y]], [[2y9h|2y9h]]</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=2y8w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2y8w OCA], [http://pdbe.org/2y8w PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2y8w RCSB], [http://www.ebi.ac.uk/pdbsum/2y8w PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2y8w ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=2y8w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2y8w OCA], [http://pdbe.org/2y8w PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2y8w RCSB], [http://www.ebi.ac.uk/pdbsum/2y8w PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2y8w ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 21: / Line 21: @@
 ==See Also==
 *[[CRISPR type I-E (Cascade)|CRISPR type I-E (Cascade)]]
-*[[Endonuclease|Endonuclease]]
+*[[Endonuclease 3D structures|Endonuclease 3D structures]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Thet8]]
 [[Category: Doudna, J A]]

2y8w

From Proteopedia

Revision as of 12:39, 22 July 2020

Structure of CRISPR endoribonuclease Cse3 bound to 20 nt RNA

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox