3j9m

Structure of the human mitochondrial ribosome (class 1)Structure of the human mitochondrial ribosome (class 1)

3j9m, resolution 3.50Å Show:Asymmetric Unit Biological Assembly Structural highlights 3j9m 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 3.5Å Ligands: Experimental data: Check Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RM42_HUMAN Publication Abstract from PubMed The highly divergent ribosomes of human mitochondria (mitoribosomes) synthesize 13 essential proteins of oxidative phosphorylation complexes. We have determined the structure of the intact mitoribosome to 3.5 angstrom resolution by means of single-particle electron cryogenic microscopy. It reveals 80 extensively interconnected proteins, 36 of which are specific to mitochondria, and three ribosomal RNA molecules. The head domain of the small subunit, particularly the messenger (mRNA) channel, is highly remodeled. Many intersubunit bridges are specific to the mitoribosome, which adopts conformations involving ratcheting or rolling of the small subunit that are distinct from those seen in bacteria or eukaryotes. An intrinsic guanosine triphosphatase mediates a contact between the head and central protuberance. The structure provides a reference for analysis of mutations that cause severe pathologies and for future drug design. Ribosome. The structure of the human mitochondrial ribosome.,Amunts A, Brown A, Toots J, Scheres SH, Ramakrishnan V Science. 2015 Apr 3;348(6230):95-8. doi: 10.1126/science.aaa1193. Epub 2015 Apr, 2. PMID:25838379 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribosome 3D structures Transfer RNA (tRNA)