کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10883338 | 1078394 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
DNA-binding proteins of mammalian mitochondria
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
بیوفیزیک
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چکیده انگلیسی
Acid-soluble proteins were isolated from liver and spleen mitochondria and their ability to form complexes with DNA was investigated. According to electrophoresis data, acid-soluble proteins include about 20 polypeptides ranging in the molecular mass from 10 to 120 kDa. It was found that acid-soluble proteins form stable DNA-protein complexes at a physiological NaCl concentration. Different polypeptides possess different degrees of DNA affinity. There is no significant difference between DNA-binding proteins of mitochondria from liver and those from spleen as to their ability to form complexes with mtDNA and nDNA. In the presence of 5 μg of DNA most polypeptides were bound to DNA, and further increase in DNA amount affected little the binding of proteins to DNA. There was no distinct difference in DNA-protein complex formation of liver mitochondrial acid-soluble proteins with nDNA or mtDNA. Also, it was detected that with these mitochondrial acid-soluble proteins, proteases that specifically cleave these proteins are associated. It was shown for the first time that these proteases are activated by DNA. DNA-binding proteins including DNA-activated mitochondrial proteases are likely to participate in the regulation of the structural organization and functional activity of mitochondrial DNA.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mitochondrion - Volume 5, Issue 1, February 2005, Pages 35-44
Journal: Mitochondrion - Volume 5, Issue 1, February 2005, Pages 35-44
نویسندگان
Michael P. Kutsyi, Natalia A. Gouliaeva, Elena A. Kuznetsova, Azhub I. Gaziev,