4pj3: Difference between revisions

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-'''Unreleased structure'''
-The entry 4pj3 is ON HOLD
+==Structural insight into the function and evolution of the spliceosomal helicase Aquarius, Structure of Aquarius in complex with AMPPNP==
+<StructureSection load='4pj3' size='340' side='right'caption='[[4pj3]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[4pj3]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4PJ3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4PJ3 FirstGlance]. <br>
+</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=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</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=4pj3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4pj3 OCA], [https://pdbe.org/4pj3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4pj3 RCSB], [https://www.ebi.ac.uk/pdbsum/4pj3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4pj3 ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/AQR_HUMAN AQR_HUMAN] Intron-binding spliceosomal protein required to link pre-mRNA splicing and snoRNP (small nucleolar ribonucleoprotein) biogenesis. Plays a key role in position-dependent assembly of intron-encoded box C/D small snoRNP, splicing being required for snoRNP assembly. May act by helping the folding of the snoRNA sequence. Binds to intron of pre-mRNAs in a sequence-independent manner, contacting the region between snoRNA and the branchpoint of introns (40 nucleotides upstream of the branchpoint) during the late stages of splicing.<ref>PMID:16949364</ref>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+Aquarius is a multifunctional putative RNA helicase that binds precursor-mRNA introns at a defined position. Here we report the crystal structure of human Aquarius, revealing a central RNA helicase core and several unique accessory domains, including an ARM-repeat domain. We show that Aquarius is integrated into spliceosomes as part of a pentameric intron-binding complex (IBC) that, together with the ARM domain, cross-links to U2 snRNP proteins within activated spliceosomes; this suggests that the latter aid in positioning Aquarius on the intron. Aquarius's ARM domain is essential for IBC formation, thus indicating that it has a key protein-protein-scaffolding role. Finally, we provide evidence that Aquarius is required for efficient precursor-mRNA splicing in vitro. Our findings highlight the remarkable structural adaptations of a helicase to achieve position-specific recruitment to a ribonucleoprotein complex and reveal a new building block of the human spliceosome.
-Authors: De, I., Bessonov, S., Hofele, R., dos Santos, K.F., Will, C.L., Urlaub, H., Luhrmann, R., Pena, V.
+The RNA helicase Aquarius exhibits structural adaptations mediating its recruitment to spliceosomes.,De I, Bessonov S, Hofele R, Dos Santos K, Will CL, Urlaub H, Luhrmann R, Pena V Nat Struct Mol Biol. 2015 Feb;22(2):138-44. doi: 10.1038/nsmb.2951. Epub 2015 Jan, 19. PMID:25599396<ref>PMID:25599396</ref>
-Description: Structural insight into the function and evolution of the spliceosomal helicase Aquarius, Structure of Aquarius in complex with AMPPNP
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
+</div>
+<div class="pdbe-citations 4pj3" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Helicase 3D structures|Helicase 3D structures]]
+== References ==
+<references/>
+__TOC__
+</StructureSection>
+[[Category: Homo sapiens]]
+[[Category: Large Structures]]
+[[Category: Bessonov S]]
+[[Category: De I]]
+[[Category: Hofele R]]
+[[Category: Luhrmann R]]
+[[Category: Pena V]]
+[[Category: Urlaub H]]
+[[Category: Will CL]]
+[[Category: Dos Santos KF]]