7z34

Structure of pre-60S particle bound to DRG1(AFG2)

spinqualitylabelsall models 7z34, resolution 3.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7z34 is a 15 chain structure with sequence from Saccharomyces cerevisiae S288C. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.8Å Ligands: AGS, MG, UNK Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function AFG2_YEAST ATP-dependent chaperone which uses the energy provided by ATP hydrolysis to generate mechanical force to disassemble protein complexes (PubMed:12006565, PubMed:17646390, PubMed:23185031, PubMed:24371142). Plays an essential role in the cytoplasmic maturation steps of pre-60S ribosomal particles by promoting the release of shuttling protein RLP24 from the pre-ribosomal particles (PubMed:17646390, PubMed:23185031, PubMed:24371142). This step facilitates the subsequent release of other shuttling proteins such as NOG1 and allows the transition of the pre-ribosomal particles to later maturation forms that bind REI1 (PubMed:17646390, PubMed:23185031, PubMed:24371142). Essential for viability (PubMed:8109176, PubMed:24371142). Publication Abstract from PubMed The AAA-ATPase Drg1 is a key factor in eukaryotic ribosome biogenesis that initiates cytoplasmic maturation of the large ribosomal subunit. Drg1 releases the shuttling maturation factor Rlp24 from pre-60S particles shortly after nuclear export, a strict requirement for downstream maturation. The molecular mechanism of release remained elusive. Here, we report a series of cryo-EM structures that captured the extraction of Rlp24 from pre-60S particles by Saccharomyces cerevisiae Drg1. These structures reveal that Arx1 and the eukaryote-specific rRNA expansion segment ES27 form a joint docking platform that positions Drg1 for efficient extraction of Rlp24 from the pre-ribosome. The tips of the Drg1 N domains thereby guide the Rlp24 C terminus into the central pore of the Drg1 hexamer, enabling extraction by a hand-over-hand translocation mechanism. Our results uncover substrate recognition and processing by Drg1 step by step and provide a comprehensive mechanistic picture of the conserved modus operandi of AAA-ATPases. Visualizing maturation factor extraction from the nascent ribosome by the AAA-ATPase Drg1.,Prattes M, Grishkovskaya I, Hodirnau VV, Hetzmannseder C, Zisser G, Sailer C, Kargas V, Loibl M, Gerhalter M, Kofler L, Warren AJ, Stengel F, Haselbach D, Bergler H Nat Struct Mol Biol. 2022 Sep 12. pii: 10.1038/s41594-022-00832-5. doi:, 10.1038/s41594-022-00832-5. PMID:36097293 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also GTP-binding protein 3D structures

Proteopedia Page Contributors and Editors (what is this?)

OCA