3iy8

Leishmania tarentolae Mitonchondrial Ribosome small subunitLeishmania tarentolae Mitonchondrial Ribosome small subunit

Structural highlights 3iy8 is a 11 chain structure with sequence from Escherichia coli and Leishmania tarentolae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, RCSB, PDBsum 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 The Leishmania tarentolae mitochondrial ribosome (Lmr) is a minimal ribosomal RNA (rRNA)-containing ribosome. We have obtained a cryo-EM map of the Lmr. The map reveals several features that have not been seen in previously-determined structures of eubacterial or eukaryotic (cytoplasmic or organellar) ribosomes to our knowledge. Comparisons of the Lmr map with X-ray crystallographic and cryo-EM maps of the eubacterial ribosomes and a cryo-EM map of the mammalian mitochondrial ribosome show that (i) the overall structure of the Lmr is considerably more porous, (ii) the topology of the intersubunit space is significantly different, with fewer intersubunit bridges, but more tunnels, and (iii) several of the functionally-important rRNA regions, including the alpha-sarcin-ricin loop, have different relative positions within the structure. Furthermore, the major portions of the mRNA channel, the tRNA passage, and the nascent polypeptide exit tunnel contain Lmr-specific proteins, suggesting that the mechanisms for mRNA recruitment, tRNA interaction, and exiting of the nascent polypeptide in Lmr must differ markedly from the mechanisms deduced for ribosomes in other organisms. Our study identifies certain structural features that are characteristic solely of mitochondrial ribosomes and other features that are characteristic of both mitochondrial and chloroplast ribosomes (i.e., organellar ribosomes). Structure of a mitochondrial ribosome with minimal RNA.,Sharma MR, Booth TM, Simpson L, Maslov DA, Agrawal RK Proc Natl Acad Sci U S A. 2009 Jun 16;106(24):9637-42. Epub 2009 Jun 3. PMID:19497863 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribosomal protein S11 Ribosomal protein S12 Ribosomal protein S15 Ribosomal protein S16 Ribosomal protein S17 Ribosomal protein S18 Ribosomal protein S8 Ribosomal protein S9

spinqualitylabelsall models 3iy8, resolution 14.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image