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1 Function  





2 Structure  





3 Genes  





4 References  














Mitochondrial ribosome: Difference between revisions






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== Function ==

== Function ==

Mitochondria contain around 1000 proteins in [[yeast]] and 1500 proteins in humans; however only 8 and 13 proteins are encoded in [[mitochondrial DNA]] in yeast and human, respectively. Most mitochondrial proteins are synthesized via cytoplasmic ribosomes.<ref name="WenzOpaliński2015">{{cite journal|last1=Wenz|first1=Lena-Sophie|last2=Opaliński|first2=Łukasz|last3=Wiedemann|first3=Nils|last4=Becker|first4=Thomas|title=Cooperation of protein machineries in mitochondrial protein sorting|journal=Biochimica et Biophysica Acta (BBA) - Molecular Cell Research|volume=1853|issue=5|year=2015|pages=1119–1129|issn=0167-4889|doi=10.1016/j.bbamcr.2015.01.012}}</ref> Proteins that are the key components in the [[electron transport chain]] are translated in mitochondria.<ref name="JohnstonWilliams2016">{{cite journal|last1=Johnston|first1=Iain G.|last2=Williams|first2=Ben P.|title=Evolutionary Inference across Eukaryotes Identifies Specific Pressures Favoring Mitochondrial Gene Retention|journal=Cell Systems|year=2016|issn=2405-4712|doi=10.1016/j.cels.2016.01.013|volume=2|pages=101–111|pmid=27135164}}</ref><ref name="Hamers2016">{{cite journal|last1=Hamers|first1=Laurel|title=Why do our cell’s power plants have their own DNA?|journal=Science|year=2016|issn=0036-8075|doi=10.1126/science.aaf4083}}</ref>

Mitochondria contain around 1000 proteins in [[yeast]] and 1500 proteins in humans; however only 8 and 13 proteins are encoded in [[mitochondrial DNA]] in yeast and human, respectively. Most mitochondrial proteins are synthesized via cytoplasmic ribosomes.<ref name="WenzOpaliński2015">{{cite journal|last1=Wenz|first1=Lena-Sophie|last2=Opaliński|first2=Łukasz|last3=Wiedemann|first3=Nils|last4=Becker|first4=Thomas|title=Cooperation of protein machineries in mitochondrial protein sorting|journal=Biochimica et Biophysica Acta (BBA) - Molecular Cell Research|volume=1853|issue=5|year=2015|pages=1119–1129|issn=0167-4889|doi=10.1016/j.bbamcr.2015.01.012|pmid=25633533}}</ref> Proteins that are the key components in the [[electron transport chain]] are translated in mitochondria.<ref name="JohnstonWilliams2016">{{cite journal|last1=Johnston|first1=Iain G.|last2=Williams|first2=Ben P.|title=Evolutionary Inference across Eukaryotes Identifies Specific Pressures Favoring Mitochondrial Gene Retention|journal=Cell Systems|year=2016|issn=2405-4712|doi=10.1016/j.cels.2016.01.013|volume=2|issue=2|pages=101–111|pmid=27135164}}</ref><ref name="Hamers2016">{{cite journal|last1=Hamers|first1=Laurel|title=Why do our cell's power plants have their own DNA?|journal=Science|year=2016|issn=0036-8075|doi=10.1126/science.aaf4083}}</ref>



== Structure ==

== Structure ==

[[Mammals|Mammalian]] mitoribosomes have small 28S and large 39S subunits, together forming a 55S mitoribosome.<ref name="GreberBieri2015">{{Cite journal |author1=Basil J. Greber |author2=Philipp Bieri |author3=Marc Leibundgut |author4=Alexander Leitner |author5=Ruedi Aebersold |author6=Daniel Boehringer |author7=Nenad Ban |title = Ribosome. The complete structure of the 55S mammalian mitochondrial ribosome |journal = [[Science (journal)|Science]] |volume = 348 |issue = 6232 |pages = 303–308 |year = 2015 |doi = 10.1126/science.aaa3872 |pmid = 25837512 }}</ref>

[[Mammals|Mammalian]] mitoribosomes have small 28S and large 39S subunits, together forming a 55S mitoribosome.<ref name="GreberBieri2015">{{Cite journal |author1=Basil J. Greber |author2=Philipp Bieri |author3=Marc Leibundgut |author4=Alexander Leitner |author5=Ruedi Aebersold |author6=Daniel Boehringer |author7=Nenad Ban |title = Ribosome. The complete structure of the 55S mammalian mitochondrial ribosome |journal = [[Science (journal)|Science]] |volume = 348 |issue = 6232 |pages = 303–308 |year = 2015 |doi = 10.1126/science.aaa3872 |pmid = 25837512 |hdl=20.500.11850/100390 }}</ref>



== Genes ==

== Genes ==


Revision as of 13:17, 13 December 2019

A diagram showing mtDNA (circular) and mitochondrial ribosomes among other mitochondria structures

Mitochondrial ribosomeormitoribosome is a protein complex that is active in mitochondria and functions as a riboprotein for translating mitochondrial mRNAs encoded in mtDNA. Mitoribosomes, like cytoplasmic ribosomes, consist of two subunits — large (mtLSU) and small (mt-SSU).[1] However, the ratio of rRNA/protein is different from cytoplasmic ribosomes, mitoribosomes consist of several specific proteins and less rRNAs.[1]

Function

Mitochondria contain around 1000 proteins in yeast and 1500 proteins in humans; however only 8 and 13 proteins are encoded in mitochondrial DNA in yeast and human, respectively. Most mitochondrial proteins are synthesized via cytoplasmic ribosomes.[2] Proteins that are the key components in the electron transport chain are translated in mitochondria.[3][4]

Structure

Mammalian mitoribosomes have small 28S and large 39S subunits, together forming a 55S mitoribosome.[5]

Genes

References

  1. ^ a b Alexey Amunts; Alan Brown; Jaan Toots; Sjors H. W. Scheres; V. Ramakrishnan (2015). "Ribosome. The structure of the human mitochondrial ribosome". Science. 348 (6230): 95–98. doi:10.1126/science.aaa1193. PMC 4501431. PMID 25838379.
  • ^ Wenz, Lena-Sophie; Opaliński, Łukasz; Wiedemann, Nils; Becker, Thomas (2015). "Cooperation of protein machineries in mitochondrial protein sorting". Biochimica et Biophysica Acta (BBA) - Molecular Cell Research. 1853 (5): 1119–1129. doi:10.1016/j.bbamcr.2015.01.012. ISSN 0167-4889. PMID 25633533.
  • ^ Johnston, Iain G.; Williams, Ben P. (2016). "Evolutionary Inference across Eukaryotes Identifies Specific Pressures Favoring Mitochondrial Gene Retention". Cell Systems. 2 (2): 101–111. doi:10.1016/j.cels.2016.01.013. ISSN 2405-4712. PMID 27135164.
  • ^ Hamers, Laurel (2016). "Why do our cell's power plants have their own DNA?". Science. doi:10.1126/science.aaf4083. ISSN 0036-8075.
  • ^ Basil J. Greber; Philipp Bieri; Marc Leibundgut; Alexander Leitner; Ruedi Aebersold; Daniel Boehringer; Nenad Ban (2015). "Ribosome. The complete structure of the 55S mammalian mitochondrial ribosome". Science. 348 (6232): 303–308. doi:10.1126/science.aaa3872. hdl:20.500.11850/100390. PMID 25837512.

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    This page was last edited on 13 December 2019, at 13:17 (UTC).

    This version of the page has been revised. Besides normal editing, the reason for revision may have been that this version contains factual inaccuracies, vandalism, or material not compatible with the Creative Commons Attribution-ShareAlike License.



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