| Structural highlights
Function
[RT23_YEAST] Required for maintenance of mitochondrial DNA.[1] [HIBCH_YEAST] Hydrolyzes 3-hydroxyisobutyryl-CoA (HIBYL-CoA), a saline catabolite. Has high activity toward isobutyryl-CoA. Could be an isobutyryl-CoA dehydrogenase that functions in valine catabolism. Also hydrolyzes 3-hydroxypropanoyl-CoA (By similarity). Has an indirect role in endocytic membrane trafficking. May have a function in protein biosynthesis in mitochondrial small ribosomal subunit.[2] [3] [RTC6_YEAST] Probable component of the mitochondrial large ribosomal subunit involved in ribosome biogenesis and translation. May be involved in a process influencing telomere capping.[4] [5] [6] [RT17_YEAST] May have a meiosis-specific role as it accumulates during the middle stage of sporulation.[7] [RT24_YEAST] Involved in mitochondrial genome encoded proteins translation. [RT10_YEAST] Involved in mitochondrial genome encoded proteins translation. Involved in the binding of tRNA to the ribosomes (By similarity). [RT12_YEAST] Required for respiratory growth.[8] [RSM28_YEAST] Involved in mitochondrial genome encoded proteins translation. [MRP10_YEAST] Involved in mitochondrial genome encoded proteins translation.[9] [COX24_YEAST] Involved in the splicing of the COX1 mRNA.[10] [FYV4_YEAST] Involved in telomere length regulation and required for survival upon exposure to K1 killer toxin.[11] [12] [MHR1_YEAST] Transcription factor involved in regulation of RNA polymerase II-dependent transcription. Also involved in regulation of mitochondrial DNA recombination, maintenance and repair, and generation of homoplasmic cells.[13] [14] [15] [16] [17] [18] [19] [RM36_YEAST] Involved in mitochondrial translation. Overexpression suppresses mutations in the COX2 leader peptide-encoding and initiation codon regions.[20] [21] [IMG1_YEAST] Essential for respiration.[22] [RM06_YEAST] Indispensable for mitochondrial function. [RMAR_YEAST] Essential for mitochondrial protein synthesis and required for the maturation of small ribosomal subunits.[23]
Publication Abstract from PubMed
Mitochondria have specialized ribosomes (mitoribosomes) dedicated to the expression of the genetic information encoded by their genomes. Here, using electron cryomicroscopy, we have determined the structure of the 75-component yeast mitoribosome to an overall resolution of 3.3 angstroms. The mitoribosomal small subunit has been built de novo and includes 15S ribosomal RNA (rRNA) and 34 proteins, including 14 without homologs in the evolutionarily related bacterial ribosome. Yeast-specific rRNA and protein elements, including the acquisition of a putatively active enzyme, give the mitoribosome a distinct architecture compared to the mammalian mitoribosome. At an expanded messenger RNA channel exit, there is a binding platform for translational activators that regulate translation in yeast but not mammalian mitochondria. The structure provides insights into the evolution and species-specific specialization of mitochondrial translation.
The structure of the yeast mitochondrial ribosome.,Desai N, Brown A, Amunts A, Ramakrishnan V Science. 2017 Feb 3;355(6324):528-531. doi: 10.1126/science.aal2415. PMID:28154081[24]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Berger T, Brigl M, Herrmann JM, Vielhauer V, Luckow B, Schlondorff D, Kretzler M. The apoptosis mediator mDAP-3 is a novel member of a conserved family of mitochondrial proteins. J Cell Sci. 2000 Oct;113 ( Pt 20):3603-12. PMID:11017876
- ↑ Wiederkehr A, Meier KD, Riezman H. Identification and characterization of Saccharomyces cerevisiae mutants defective in fluid-phase endocytosis. Yeast. 2001 Jun;18(8):759-73. PMID:11378903 doi:http://dx.doi.org/10.1002/yea.726
- ↑ Samanta MP, Liang S. Predicting protein functions from redundancies in large-scale protein interaction networks. Proc Natl Acad Sci U S A. 2003 Oct 28;100(22):12579-83. Epub 2003 Oct 17. PMID:14566057 doi:http://dx.doi.org/10.1073/pnas.2132527100
- ↑ Andrade MA, Daruvar A, Casari G, Schneider R, Termier M, Sander C. Characterization of new proteins found by analysis of short open reading frames from the full yeast genome. Yeast. 1997 Nov;13(14):1363-74. PMID:9392081 doi:<1363::AID-YEA182>3.0.CO;2-8 http://dx.doi.org/10.1002/(SICI)1097-0061(199711)13:14<1363::AID-YEA182>3.0.CO;2-8
- ↑ Addinall SG, Downey M, Yu M, Zubko MK, Dewar J, Leake A, Hallinan J, Shaw O, James K, Wilkinson DJ, Wipat A, Durocher D, Lydall D. A genomewide suppressor and enhancer analysis of cdc13-1 reveals varied cellular processes influencing telomere capping in Saccharomyces cerevisiae. Genetics. 2008 Dec;180(4):2251-66. Epub 2008 Oct 9. PMID:18845848 doi:http://dx.doi.org/genetics.108.092577
- ↑ Alamgir M, Erukova V, Jessulat M, Azizi A, Golshani A. Chemical-genetic profile analysis of five inhibitory compounds in yeast. BMC Chem Biol. 2010 Aug 6;10:6. doi: 10.1186/1472-6769-10-6. PMID:20691087 doi:http://dx.doi.org/10.1186/1472-6769-10-6
- ↑ Hanlon SE, Xu Z, Norris DN, Vershon AK. Analysis of the meiotic role of the mitochondrial ribosomal proteins Mrps17 and Mrpl37 in Saccharomyces cerevisiae. Yeast. 2004 Nov;21(15):1241-52. PMID:15543521 doi:http://dx.doi.org/10.1002/yea.1174
- ↑ Fujita K, Horie T, Isono K. Cross-genomic analysis of the translational systems of various organisms. J Ind Microbiol Biotechnol. 2001 Sep;27(3):163-9. PMID:11780787
- ↑ Jin C, Myers AM, Tzagoloff A. Cloning and characterization of MRP10, a yeast gene coding for a mitochondrial ribosomal protein. Curr Genet. 1997 Mar;31(3):228-34. PMID:9065385
- ↑ Barros MH, Myers AM, Van Driesche S, Tzagoloff A. COX24 codes for a mitochondrial protein required for processing of the COX1 transcript. J Biol Chem. 2006 Feb 10;281(6):3743-51. Epub 2005 Dec 8. PMID:16339141 doi:http://dx.doi.org/10.1074/jbc.M510778200
- ↑ Page N, Gerard-Vincent M, Menard P, Beaulieu M, Azuma M, Dijkgraaf GJ, Li H, Marcoux J, Nguyen T, Dowse T, Sdicu AM, Bussey H. A Saccharomyces cerevisiae genome-wide mutant screen for altered sensitivity to K1 killer toxin. Genetics. 2003 Mar;163(3):875-94. PMID:12663529
- ↑ Gatbonton T, Imbesi M, Nelson M, Akey JM, Ruderfer DM, Kruglyak L, Simon JA, Bedalov A. Telomere length as a quantitative trait: genome-wide survey and genetic mapping of telomere length-control genes in yeast. PLoS Genet. 2006 Mar;2(3):e35. Epub 2006 Mar 17. PMID:16552446 doi:http://dx.doi.org/10.1371/journal.pgen.0020035
- ↑ Ling F, Morioka H, Ohtsuka E, Shibata T. A role for MHR1, a gene required for mitochondrial genetic recombination, in the repair of damage spontaneously introduced in yeast mtDNA. Nucleic Acids Res. 2000 Dec 15;28(24):4956-63. PMID:11121487
- ↑ Emili A, Kobayashi R, Ingles CJ. A novel yeast protein influencing the response of RNA polymerase II to transcriptional activators. Proc Natl Acad Sci U S A. 1998 Sep 15;95(19):11122-7. PMID:9736700
- ↑ Ling F, Makishima F, Morishima N, Shibata T. A nuclear mutation defective in mitochondrial recombination in yeast. EMBO J. 1995 Aug 15;14(16):4090-101. PMID:7664749
- ↑ Ling F, Shibata T. Recombination-dependent mtDNA partitioning: in vivo role of Mhr1p to promote pairing of homologous DNA. EMBO J. 2002 Sep 2;21(17):4730-40. PMID:12198175
- ↑ Traven A, Staresincic L, Arneric M, Sopta M. The yeast protein Xtc1 functions as a direct transcriptional repressor. Nucleic Acids Res. 2002 Jun 1;30(11):2358-64. PMID:12034822
- ↑ Ling F, Shibata T. Mhr1p-dependent concatemeric mitochondrial DNA formation for generating yeast mitochondrial homoplasmic cells. Mol Biol Cell. 2004 Jan;15(1):310-22. Epub 2003 Oct 17. PMID:14565971 doi:http://dx.doi.org/10.1091/mbc.E03-07-0508
- ↑ Mookerjee SA, Sia EA. Overlapping contributions of Msh1p and putative recombination proteins Cce1p, Din7p, and Mhr1p in large-scale recombination and genome sorting events in the mitochondrial genome of Saccharomyces cerevisiae. Mutat Res. 2006 Mar 20;595(1-2):91-106. PMID:16337661 doi:http://dx.doi.org/S0027-5107(05)00465-3
- ↑ Bonnefoy N, Bsat N, Fox TD. Mitochondrial translation of Saccharomyces cerevisiae COX2 mRNA is controlled by the nucleotide sequence specifying the pre-Cox2p leader peptide. Mol Cell Biol. 2001 Apr;21(7):2359-72. PMID:11259585 doi:http://dx.doi.org/10.1128/MCB.21.7.2359-2372.2001
- ↑ Williams EH, Perez-Martinez X, Fox TD. MrpL36p, a highly diverged L31 ribosomal protein homolog with additional functional domains in Saccharomyces cerevisiae mitochondria. Genetics. 2004 May;167(1):65-75. PMID:15166137
- ↑ Coppee JY, Rieger KJ, Kaniak A, di Rago JP, Groudinsky O, Slonimski PP. PetCR46, a gene which is essential for respiration and integrity of the mitochondrial genome. Yeast. 1996 May;12(6):577-82. PMID:8771712 doi:<577::AID-YEA950>3.0.CO;2-2 http://dx.doi.org/10.1002/(SICI)1097-0061(199605)12:6<577::AID-YEA950>3.0.CO;2-2
- ↑ Davis SC, Ellis SR. Incorporation of the yeast mitochondrial ribosomal protein Mrp2 into ribosomal subunits requires the mitochondrially encoded Var1 protein. Mol Gen Genet. 1995 May 10;247(3):379-86. PMID:7770043
- ↑ Desai N, Brown A, Amunts A, Ramakrishnan V. The structure of the yeast mitochondrial ribosome. Science. 2017 Feb 3;355(6324):528-531. doi: 10.1126/science.aal2415. PMID:28154081 doi:http://dx.doi.org/10.1126/science.aal2415
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