7r72

State E1 nucleolar 60S ribosome biogenesis intermediate - Spb4 local model

spinqualitylabelsall models 7r72, resolution 3.07Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7r72 is a 10 chain structure with sequence from Saccharomyces cerevisiae BY4741. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.07Å Ligands: ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function NOC2_YEAST Involved in the intranuclear transport of ribosomal precursors. Publication Abstract from PubMed DEAD-box ATPases are ubiquitous enzymes essential in all aspects of RNA biology. However, the limited in vitro catalytic activities described for these enzymes are at odds with their complex cellular roles, most notably in driving large-scale RNA remodeling steps during the assembly of ribonucleoproteins (RNPs). We describe cryo-EM structures of 60S ribosomal biogenesis intermediates that reveal how context-specific RNA unwinding by the DEAD-box ATPase Spb4 results in extensive, sequence-specific remodeling of rRNA secondary structure. Multiple cis and trans interactions stabilize Spb4 in a post-catalytic, high-energy intermediate that drives the organization of the three-way junction at the base of rRNA domain IV. This mechanism explains how limited strand separation by DEAD-box ATPases is leveraged to provide non-equilibrium directionality and ensure efficient and accurate RNP assembly. Sequence-specific remodeling of a topologically complex RNP substrate by Spb4.,Cruz VE, Sekulski K, Peddada N, Sailer C, Balasubramanian S, Weirich CS, Stengel F, Erzberger JP Nat Struct Mol Biol. 2022 Dec;29(12):1228-1238. doi: 10.1038/s41594-022-00874-9. , Epub 2022 Dec 8. PMID:36482249 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Helicase 3D structures Ribosome 3D structures Ribosome biogenesis protein 3D structures

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