4an8: Difference between revisions

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OCA

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 <StructureSection load='4an8' size='340' side='right'caption='[[4an8]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4an8]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4AN8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4AN8 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4an8]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus_HB8 Thermus thermophilus HB8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4AN8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4AN8 FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene></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=4an8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4an8 OCA], [https://pdbe.org/4an8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4an8 RCSB], [https://www.ebi.ac.uk/pdbsum/4an8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4an8 ProSAT]</span></td></tr>
 </table>
-== Function ==
-[[https://www.uniprot.org/uniprot/CSE1_THET8 CSE1_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) (By similarity).  A component of Cascade, which participates in CRISPR interference, the third stage of CRISPR immunity. Cascade binds both crRNA and in a sequence-specific manner negatively supercoiled dsDNA target. This leads to the formation of an R-loop in which the crRNA binds the target DNA, displacing the noncomplementary strand. Cas3 is recruited to Cascade, probably via interactions with CasA, nicks target DNA and then unwinds and cleaves the target, leading to DNA degradation and invader neutralization. CasA is not required for formation of Cascade, but probably enhances binding to and subsequent recognition of both target dsDNA and ssDNA (By similarity).
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
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 </StructureSection>
 [[Category: Large Structures]]
-[[Category: Doudna, J A]]
+[[Category: Thermus thermophilus HB8]]
-[[Category: Sashital, D G]]
+[[Category: Doudna JA]]
-[[Category: Wiedenheft, B]]
+[[Category: Sashital DG]]
-[[Category: Casa]]
+[[Category: Wiedenheft B]]
-[[Category: Cascade]]
-[[Category: Crispr]]
-[[Category: Immune system]]