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1di2

From Proteopedia

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(New page: 200px<br /><applet load="1di2" size="450" color="white" frame="true" align="right" spinBox="true" caption="1di2, resolution 1.90&Aring;" /> '''CRYSTAL STRUCTURE OF...)
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[[Image:1di2.jpg|left|200px]]<br /><applet load="1di2" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1di2, resolution 1.90&Aring;" />
 
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'''CRYSTAL STRUCTURE OF A DSRNA-BINDING DOMAIN COMPLEXED WITH DSRNA: MOLECULAR BASIS OF DOUBLE-STRANDED RNA-PROTEIN INTERACTIONS'''<br />
 
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==Overview==
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==CRYSTAL STRUCTURE OF A DSRNA-BINDING DOMAIN COMPLEXED WITH DSRNA: MOLECULAR BASIS OF DOUBLE-STRANDED RNA-PROTEIN INTERACTIONS==
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Protein interactions with double-stranded RNA (dsRNA) are critical for, many cell processes; however, in contrast to protein-dsDNA interactions, surprisingly little is known about the molecular basis of protein-dsRNA, interactions. A large and diverse class of proteins that bind dsRNA do so, by utilizing an approximately 70 amino acid motif referred to as the, dsRNA-binding domain (dsRBD). We have determined a 1.9 A resolution, crystal structure of the second dsRBD of Xenopus laevis RNA-binding, protein A complexed with dsRNA. The structure shows that the protein spans, 16 bp of dsRNA, interacting with two successive minor grooves and across, the intervening major groove on one face of a primarily A-form RNA helix., The nature of these interactions explains dsRBD specificity for dsRNA, (over ssRNA or dsDNA) and the apparent lack of sequence specificity., Interestingly, the dsRBD fold resembles a portion of the conserved core, structure of a family of polynucleotidyl transferases that includes RuvC, MuA transposase, retroviral integrase and RNase H. Structural comparisons, of the dsRBD-dsRNA complex and models proposed for polynucleotidyl, transferase-nucleic acid complexes suggest that similarities in nucleic, acid binding also exist between these families of proteins.
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<StructureSection load='1di2' size='340' side='right'caption='[[1di2]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1di2]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DI2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DI2 FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
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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=1di2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1di2 OCA], [https://pdbe.org/1di2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1di2 RCSB], [https://www.ebi.ac.uk/pdbsum/1di2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1di2 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/PRKAB_XENLA PRKAB_XENLA] Activates eif2ak2/pkr in the absence of double-stranded RNA (dsRNA), leading to phosphorylation of eif2s1/efi2-alpha and inhibition of translation and induction of apoptosis. Required for siRNA production by dicer1 and for subsequent siRNA-mediated post-transcriptional gene silencing. Does not seem to be required for processing of pre-miRNA to miRNA by dicer1 (By similarity).
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/di/1di2_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1di2 ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1DI2 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1DI2 OCA].
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*[[P19|P19]]
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__TOC__
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==Reference==
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</StructureSection>
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Molecular basis of double-stranded RNA-protein interactions: structure of a dsRNA-binding domain complexed with dsRNA., Ryter JM, Schultz SC, EMBO J. 1998 Dec 15;17(24):7505-13. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9857205 9857205]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Xenopus laevis]]
[[Category: Xenopus laevis]]
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[[Category: Ryter, J.M.]]
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[[Category: Ryter JM]]
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[[Category: Schultz, S.C.]]
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[[Category: Schultz SC]]
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[[Category: double stranded rna]]
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[[Category: protein-rna complex]]
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[[Category: protein-rna interactions]]
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[[Category: rna-bining protein]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 13:17:43 2007''
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Current revision

CRYSTAL STRUCTURE OF A DSRNA-BINDING DOMAIN COMPLEXED WITH DSRNA: MOLECULAR BASIS OF DOUBLE-STRANDED RNA-PROTEIN INTERACTIONS

PDB ID 1di2

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