1di2
CRYSTAL STRUCTURE OF A DSRNA-BINDING DOMAIN COMPLEXED WITH DSRNA: MOLECULAR BASIS OF DOUBLE-STRANDED RNA-PROTEIN INTERACTIONSCRYSTAL STRUCTURE OF A DSRNA-BINDING DOMAIN COMPLEXED WITH DSRNA: MOLECULAR BASIS OF DOUBLE-STRANDED RNA-PROTEIN INTERACTIONS
Structural highlights
Function[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). 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 PubMedProtein 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. 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:9857205[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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