Ribosomes

T

timojin

Valued Senior Member
Does mitochondria have its own Ribosomes or it utilizes the the ribosomes from the Cytoplasm
 
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.
 
timojin said:
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 ?
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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.
 
Walter L. Wagner said:
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.
Click to expand...

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 ?
 
timojin said:
Ribosomes are produced in the nucleole.
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Cytosol, I believe. Final assembly takes place outside the Nucelole.

http://www.nature.com/nrm/journal/v2/n7/box/nrm0701_514a_BX3.html
timojin said:
So how the nucleole gets the information to produce Ribosome.
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It's really complicated. http://www.ncbi.nlm.nih.gov/books/NBK21652/
timojin said:
Or same question is how does Golgi body gets the information on how to attach an glyco or fat molecule to the proteine ?
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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/
 
rpenner said:
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/
Click to expand...

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