4v5z | pdb_00004v5z

Structure of a mammalian 80S ribosome obtained by docking homology models of the RNA and proteins into an 8.7 A cryo-EM map

spinqualitylabelsall models 4v5z, resolution 8.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4v5z is a 86 chain structure with sequence from Canis lupus familiaris. This structure supersedes the now removed PDB entries and 2zkr. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 2zkq, 2zkr Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed In this paper, we present a structure of the mammalian ribosome determined at approximately 8.7 A resolution by electron cryomicroscopy and single-particle methods. A model of the ribosome was created by docking homology models of subunit rRNAs and conserved proteins into the density map. We then modeled expansion segments in the subunit rRNAs and found unclaimed density for approximately 20 proteins. In general, many conserved proteins and novel proteins interact with expansion segments to form an integrated framework that may stabilize the mature ribosome. Our structure provides a snapshot of the mammalian ribosome at the beginning of translation and lends support to current models in which large movements of the small subunit and L1 stalk occur during tRNA translocation. Finally, details are presented for intersubunit bridges that are specific to the eukaryotic ribosome. We suggest that these bridges may help reset the conformation of the ribosome to prepare for the next cycle of chain elongation. Structure of the mammalian 80S ribosome at 8.7 A resolution.,Chandramouli P, Topf M, Menetret JF, Eswar N, Cannone JJ, Gutell RR, Sali A, Akey CW Structure. 2008 Apr;16(4):535-48. PMID:18400176 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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