کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10796068 | 1052690 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Old and new data, new issues: The mitochondrial ÎΨ
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
New and old data pertinent to the electrochemical potentials across the inner mitochondrial membrane are reviewed with the intent of reconciling the various findings in the light of new perspectives provided by more recent knowledge. A careful scrutiny of old data permits ruling out the presence of a significant metabolically dependent electrical membrane potential. Recent technological advances make it possible to test the proposed alternatives. These proposals recast the original idea, and the possible mechanisms that are emerging also invoke a protonmotive force. Our conclusions that ÎΨ is not involved in oxidative-phosphorylation finds parallel observations in Halobacterium halobium [H. Michel, D. Oesterhelt, Electrochemical proton gradient across the cell membrane of Halobacterium halobium: comparison of the light-induced increase with the increase of intracellular adenosine triphosphate under steady-state illumination, Biochemistry 19 (1980) 4615-4619] and thylakoid vesicles [D.R. Ort, R.A. Dilley, N.E. Good, Photophosphorylation as a function of illumination time II. Effects of permeant buffers, Biochim. Biophys. Acta 449 (1976) 108-129] in which light-induced ATP synthesis occurs in the absence of an apparent ÎΨ or ÎpH, suggesting the presence of mechanisms similar to the one proposed for mitochondria.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1709, Issue 3, 30 September 2005, Pages 195-202
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1709, Issue 3, 30 September 2005, Pages 195-202
نویسندگان
Henry Tedeschi,