2i91
From Proteopedia
60kDa Ro autoantigen in complex with a fragment of misfolded RNA
Structural highlights
FunctionRO60_XENLA RNA-binding protein that binds to several small cytoplasmic RNA molecules known as Y RNAs. May stabilize these RNAs from degradation. May play roles in cilia formation and/or maintenance (By similarity). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe Ro autoantigen is ring-shaped, binds misfolded noncoding RNAs and is proposed to function in quality control. Here we determine how Ro interacts with misfolded RNAs. Binding of Ro to misfolded precursor (pre)-5S ribosomal RNA requires a single-stranded 3' end and helical elements. As mutating most sequences of the helices and tail results in modest decreases in binding, Ro may be able to associate with a range of RNAs. Ro binds several other RNAs that contain single-stranded tails. A crystal structure of Ro bound to a misfolded pre-5S rRNA fragment reveals that the tail inserts into the cavity, while a helix binds on the surface. Most contacts of Ro with the helix are to the backbone. Mutagenesis reveals that Ro has an extensive RNA-binding surface. We propose that Ro uses this surface to scavenge RNAs that fail to bind their specific RNA-binding proteins. Structural and biochemical basis for misfolded RNA recognition by the Ro autoantigen.,Fuchs G, Stein AJ, Fu C, Reinisch KM, Wolin SL Nat Struct Mol Biol. 2006 Nov;13(11):1002-9. Epub 2006 Oct 15. PMID:17041599[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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