3k49

Puf3 RNA binding domain bound to Cox17 RNA 3' UTR recognition sequence site B

spinqualitylabelsall models 3k49, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3k49 is a 6 chain structure with sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.5Å Ligands: CIT Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PUF3_YEAST RNA-binding protein involved in post-transcriptional regulation. Negatively regulates expression of COX17 by binding to the 3'-UTR of COX17 mRNA. Promotes decay of COX17 mRNA by enhancing its rate of deadenylation and subsequent turnover. Predominantly binds to mRNAs encoding mitochondrial proteins and localizes them to the vicinity of mitochondria for translation. Regulates mitochondrial biogenesis, motility and morphology. 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 PubMed A single regulatory protein can control the fate of many mRNAs with related functions. The Puf3 protein of Saccharomyces cerevisiae is exemplary, as it binds and regulates more than 100 mRNAs that encode proteins with mitochondrial function. Here we elucidate the structural basis of that specificity. To do so, we explore the crystal structures of Puf3p complexes with 2 cognate RNAs. The key determinant of Puf3p specificity is an unusual interaction between a distinctive pocket of the protein with an RNA base outside the "core" PUF-binding site. That interaction dramatically affects binding affinity in vitro and is required for regulation in vivo. The Puf3p structures, combined with those of Puf4p in the same organism, illuminate the structural basis of natural PUF-RNA networks. Yeast Puf3p binds its own RNAs because they possess a -2C and is excluded from those of Puf4p which contain an additional nucleotide in the core-binding site. A 5' cytosine binding pocket in Puf3p specifies regulation of mitochondrial mRNAs.,Zhu D, Stumpf CR, Krahn JM, Wickens M, Hall TM Proc Natl Acad Sci U S A. 2009 Dec 1;106(48):20192-7. Epub 2009 Nov 16. PMID:19918084 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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