6ip6 | pdb_00006ip6

Cryo-EM structure of the CMV-stalled human 80S ribosome with HCV IRES (Structure iii)

Loading... Status: waiting for Mol* initialization Structural highlights 6ip6 is a 10 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 4.5Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RS15A_HUMAN Publication Abstract from PubMed Translation initiation of hepatitis C virus (HCV) genomic RNA is induced by an internal ribosome entry site (IRES). Our cryoelectron microscopy (cryo-EM) analysis revealed that the HCV IRES binds to the solvent side of the 40S platform of the cap-dependently translating 80S ribosome. Furthermore, we obtained the cryo-EM structures of the HCV IRES capturing the 40S subunit of the IRES-dependently translating 80S ribosome. In the elucidated structures, the HCV IRES "body," consisting of domain III except for subdomain IIIb, binds to the 40S subunit, while the "long arm," consisting of domain II, remains flexible and does not impede the ongoing translation. Biochemical experiments revealed that the cap-dependently translating ribosome becomes a better substrate for the HCV IRES than the free ribosome. Therefore, the HCV IRES is likely to efficiently induce the translation initiation of its downstream mRNA with the captured translating ribosome as soon as the ongoing translation terminates. HCV IRES Captures an Actively Translating 80S Ribosome.,Yokoyama T, Machida K, Iwasaki W, Shigeta T, Nishimoto M, Takahashi M, Sakamoto A, Yonemochi M, Harada Y, Shigematsu H, Shirouzu M, Tadakuma H, Imataka H, Ito T Mol Cell. 2019 May 7. pii: S1097-2765(19)30314-4. doi:, 10.1016/j.molcel.2019.04.022. PMID:31080011 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribosome 3D structures 3D sructureseceptor for activated protein kinase C 1

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