Ribosomes

Discussion in 'Biology & Genetics' started by timojin, Sep 4, 2015.

  1. timojin Valued Senior Member

    Messages:
    3,252
    Does mitochondria have its own Ribosomes or it utilizes the the ribosomes from the Cytoplasm
     
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. Walter L. Wagner Cosmic Truth Seeker Valued Senior Member

    Messages:
    2,559
  4. Google AdSense Guest Advertisement



    to hide all adverts.
  5. rpenner Fully Wired Valued Senior Member

    Messages:
    4,833
    From that article: “In 1967, it was discovered that mitochondria contained ribosomes.”
    Also “The ribosomes coded for by the mitochondrial DNA are similar to those from bacteria in size and structure.[85] They closely resemble the bacterial 70S ribosome and not the 80S cytoplasmic ribosomes, which are coded for by nuclear DNA.
    [85] O'Brien TW (2003). "Properties of human mitochondrial ribosomes". IUBMB Life 55 (9): 505–13. doi:10.1080/15216540310001626610. PMID 14658756.”

    Chloroplasts also have ribosomes more similar to prokaryote ribosomes than eukaryote ribosomes.
     
    Walter L. Wagner likes this.
  6. Google AdSense Guest Advertisement



    to hide all adverts.
  7. timojin Valued Senior Member

    Messages:
    3,252
    According, then the proteolytic enzyme must be produced in the mitochondria; so the metabolic process in maintaining the body temperature at normal level and I suppose the final digestion to convert fuel into CO2 and water takes place in the mitochondria ?
     
  8. Walter L. Wagner Cosmic Truth Seeker Valued Senior Member

    Messages:
    2,559
    Some does, but I would not be surprised to see regulatory functions outside of the mitochondria as well.

    As rpenner noted, it has long been known that the mitochondrial ribosomes resemble the prokaryotic ribosomes, not the cellular eukaryotic ribosomes. They are made from sub-units that are very close in size to the subunits of the prokaryotes, as well. All that known since at least the 1970s.
     
  9. timojin Valued Senior Member

    Messages:
    3,252
    Ribosomes are produced in the nucleole. So how the nucleole gets the information to produce Ribosome. Or same question is how does Golgi body gets the information on how to attach an glyco or fat molecule to the proteine ?
     
  10. rpenner Fully Wired Valued Senior Member

    Messages:
    4,833
    Cytosol, I believe. Final assembly takes place outside the Nucelole.

    http://www.nature.com/nrm/journal/v2/n7/box/nrm0701_514a_BX3.html
    It's really complicated. http://www.ncbi.nlm.nih.gov/books/NBK21652/
    Likely an amino acid chain functions as a recognition signal for a special enzyme that does the job.
    http://www.ncbi.nlm.nih.gov/books/NBK1926/
     
  11. timojin Valued Senior Member

    Messages:
    3,252
    I can tell one thing you have great reference for a Physicist, and you have a great interest in living things. Thanks
     

Share This Page