کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1926640 1536470 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The unusual co-assembly of H- and M-chains in the ferritin molecule from the Antarctic teleosts Trematomus bernacchii and Trematomus newnesi
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
The unusual co-assembly of H- and M-chains in the ferritin molecule from the Antarctic teleosts Trematomus bernacchii and Trematomus newnesi
چکیده انگلیسی

Ferritins from the liver and spleen of the cold-adapted Antarctic teleosts Trematomus bernacchii and Trematomus newnesi have been isolated and characterized. Interestingly, only H- and M-chains are expressed and no L-chains. The H-chains contain the conserved ferroxidase center residues while M-chains harbor both the ferroxidase center and the micelle nucleation site ligands. Ferritins have an organ-specific subunit composition, they are: M homopolymers in spleen and H/M heteropolymers in liver. The M-chain homopolymer mineralizes iron at higher rate with respect to the H/M heteropolymer, which however is endowed with a lower activation energy for the iron incorporation process, indicative of a higher local flexibility. These findings and available literature data on ferritin expression in fish point to the role of tissue-specific expression of different chains in modulating the iron oxidation/mineralization process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Archives of Biochemistry and Biophysics - Volume 478, Issue 1, 1 October 2008, Pages 69–74
نویسندگان
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