6shb

<table><tr><td colspan='2'>[[6shb]] is a 39 chain structure with sequence from [http://en.wikipedia.org/wiki/ ], [http://en.wikipedia.org/wiki/Sulir Sulir] and [http://en.wikipedia.org/wiki/Sulfolobus_islandicus_rey15a Sulfolobus islandicus rey15a]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6SHB OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6SHB FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SiRe_0602 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=930945 SULIR]), SiRe_0599 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=930945 SULIR])</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=6shb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6shb OCA], [http://pdbe.org/6shb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6shb RCSB], [http://www.ebi.ac.uk/pdbsum/6shb PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6shb ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

Cmr-beta is a type III-B CRISPR-Cas complex that, upon target RNA recognition, unleashes a multifaceted immune response against invading genetic elements, including single-stranded DNA (ssDNA) cleavage, cyclic oligoadenylate synthesis, and also a unique UA-specific single-stranded RNA (ssRNA) hydrolysis by the Cmr2 subunit. Here, we present the structure-function relationship of Cmr-beta, unveiling how binding of the target RNA regulates the Cmr2 activities. Cryoelectron microscopy (cryo-EM) analysis revealed the unique subunit architecture of Cmr-beta and captured the complex in different conformational stages of the immune response, including the non-cognate and cognate target-RNA-bound complexes. The binding of the target RNA induces a conformational change of Cmr2, which together with the complementation between the 5' tag in the CRISPR RNAs (crRNA) and the 3' antitag of the target RNA activate different configurations in a unique loop of the Cmr3 subunit, which acts as an allosteric sensor signaling the self- versus non-self-recognition. These findings highlight the diverse defense strategies of type III complexes.

Structures of the Cmr-beta Complex Reveal the Regulation of the Immunity Mechanism of Type III-B CRISPR-Cas.,Sofos N, Feng M, Stella S, Pape T, Fuglsang A, Lin J, Huang Q, Li Y, She Q, Montoya G Mol Cell. 2020 Jul 29. pii: S1097-2765(20)30474-3. doi:, 10.1016/j.molcel.2020.07.008. PMID:32730741<ref>PMID:32730741</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 6shb" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Montoya, G]]

[[Category: Sofos, N]]

[[Category: Stella, S]]

[[Category: Nuclease]]