5h9e

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m (Protected "5h9e" [edit=sysop:move=sysop])
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'''Unreleased structure'''
 
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The entry 5h9e is ON HOLD
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==Crystal structure of E. coli Cascade bound to a PAM-containing dsDNA target (32-nt spacer) at 3.20 angstrom resolution.==
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<StructureSection load='5h9e' size='340' side='right' caption='[[5h9e]], [[Resolution|resolution]] 3.21&Aring;' scene=''>
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Authors: Hayes, R.P., Xiao, Y., Ding, F., van Erp, P.B.G., Rajashankar, K., Bailey, S., Wiedenheft, B., Ke, A.
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== Structural highlights ==
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<table><tr><td colspan='2'>[[5h9e]] is a 14 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5H9E OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5H9E FirstGlance]. <br>
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Description: Crystal structure of E. coli Cascade bound to a PAM-containing dsDNA target (32-nt spacer) at 3.20 angstrom resolution.
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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[[Category: Unreleased Structures]]
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<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=23G:GUANOSINE-5-PHOSPHATE-2,3-CYCLIC+PHOSPHATE'>23G</scene></td></tr>
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[[Category: Xiao, Y]]
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5h9f|5h9f]]</td></tr>
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[[Category: Hayes, R.P]]
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<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=5h9e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5h9e OCA], [http://pdbe.org/5h9e PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5h9e RCSB], [http://www.ebi.ac.uk/pdbsum/5h9e PDBsum]</span></td></tr>
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</table>
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== Function ==
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[[http://www.uniprot.org/uniprot/CASC_ECOLI CASC_ECOLI]] 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).<ref>PMID:21255106</ref> <ref>PMID:21460843</ref> <ref>PMID:21699496</ref> 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, nicks target DNA and then unwinds and cleaves the target, leading to DNA degradation and invader neutralization. CasCDE alone is also able to form R-loops.<ref>PMID:21255106</ref> <ref>PMID:21460843</ref> <ref>PMID:21699496</ref> [[http://www.uniprot.org/uniprot/CSE2_ECOLI CSE2_ECOLI]] 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).<ref>PMID:21255106</ref> <ref>PMID:21460843</ref> 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, nicks target DNA and then unwinds and cleaves the target, leading to DNA degradation and invader neutralization.<ref>PMID:21255106</ref> <ref>PMID:21460843</ref> [[http://www.uniprot.org/uniprot/CAS6_ECOLI CAS6_ECOLI]] 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).<ref>PMID:18703739</ref> <ref>PMID:21219465</ref> <ref>PMID:21255106</ref> <ref>PMID:21460843</ref> <ref>PMID:21699496</ref> CasE is required to process the pre-crRNA into single repeat-spacer units, with an 8-nt 5'-repeat DNA tag that may help other proteins recognize the crRNA. This subunit alone will cleave pre-crRNA, as will CasCDE or CasCE; cleavage does not require divalent metals or ATP. CasCDE alone is also able to form R-loops. Partially inhibits the cleavage of Holliday junctions by YgbT (Cas1). Yields a 5'-hydroxy group and a 2',3'-cyclic phosphate terminus.<ref>PMID:18703739</ref> <ref>PMID:21219465</ref> <ref>PMID:21255106</ref> <ref>PMID:21460843</ref> <ref>PMID:21699496</ref> 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, nicks target DNA and then unwinds and cleaves the target, leading to DNA degradation and invader neutralization.<ref>PMID:18703739</ref> <ref>PMID:21219465</ref> <ref>PMID:21255106</ref> <ref>PMID:21460843</ref> <ref>PMID:21699496</ref> [[http://www.uniprot.org/uniprot/CSE1_ECOLI CSE1_ECOLI]] 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).<ref>PMID:21255106</ref> <ref>PMID:21460843</ref> <ref>PMID:22621933</ref> <ref>PMID:22521690</ref> 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.<ref>PMID:21255106</ref> <ref>PMID:21460843</ref> <ref>PMID:22621933</ref> <ref>PMID:22521690</ref> [[http://www.uniprot.org/uniprot/CAS5_ECOLI CAS5_ECOLI]] 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).<ref>PMID:21255106</ref> <ref>PMID:21460843</ref> <ref>PMID:21699496</ref> 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, nicks target DNA and then unwinds and cleaves the target, leading to DNA degradation and invader neutralization. CasCDE alone is also able to form R-loops.<ref>PMID:21255106</ref> <ref>PMID:21460843</ref> <ref>PMID:21699496</ref>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Bailey, S]]
[[Category: Bailey, S]]
[[Category: Ding, F]]
[[Category: Ding, F]]
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[[Category: Wiedenheft, B]]
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[[Category: Erp, P B.G van]]
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[[Category: Van Erp, P.B.G]]
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[[Category: Hayes, R P]]
[[Category: Ke, A]]
[[Category: Ke, A]]
[[Category: Rajashankar, K]]
[[Category: Rajashankar, K]]
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[[Category: Wiedenheft, B]]
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[[Category: Xiao, Y]]
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[[Category: Crispr cascade]]
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[[Category: Immune system-rna complex]]

Revision as of 02:56, 21 February 2016

Crystal structure of E. coli Cascade bound to a PAM-containing dsDNA target (32-nt spacer) at 3.20 angstrom resolution.

5h9e, resolution 3.21Å

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