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Yeast Mitochondrial Interactosome Model: Metabolon Membrane Proteins Complex Involved in the Channeling of ADP/ATP
INSERM U1055, Laboratory of Fundamental and Applied Bioenergetics, Joseph Fourier University, 2280 Rue de la piscine, BP 53 38041 Grenoble cedex 9, France
Received: 11 November 2011; in revised form: 20 January 2012 / Accepted: 31 January 2012 / Published: 10 February 2012
Abstract: The existence of a mitochondrial interactosome (MI) has been currently well established in mammalian cells but the exact composition of this super-complex is not precisely known, and its organization seems to be different from that in yeast. One major difference is the absence of mitochondrial creatine kinase (MtCK) in yeast, unlike that described in the organization model of MI, especially in cardiac, skeletal muscle and brain cells. The aim of this review is to provide a detailed description of different partner proteins involved in the synergistic ADP/ATP transport across the mitochondrial membranes in the yeast Saccharomyces cerevisiae and to propose a new mitochondrial interactosome model. The ADP/ATP (Aacp) and inorganic phosphate (PiC) carriers as well as the VDAC (or mitochondrial porin) catalyze the import and export of ADP, ATP and Pi across the mitochondrial membranes. Aacp and PiC, which appear to be associated with the ATP synthase, consist of two nanomotors (F0, F1) under specific conditions and form ATP synthasome. Identification and characterization of such a complex were described for the first time by Pedersen and co-workers in 2003.
Keywords: diffusion; metabolic microcompartmentation; mitochondrial interactosome; phosphotransfer network; metabolon; ATP synthasome; ADP/ATP carrier; VDAC; inorganic phosphate carrier
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Clémençon, B. Yeast Mitochondrial Interactosome Model: Metabolon Membrane Proteins Complex Involved in the Channeling of ADP/ATP. Int. J. Mol. Sci. 2012, 13, 1858-1885.
Clémençon B. Yeast Mitochondrial Interactosome Model: Metabolon Membrane Proteins Complex Involved in the Channeling of ADP/ATP. International Journal of Molecular Sciences. 2012; 13(2):1858-1885.
Clémençon, Benjamin. 2012. "Yeast Mitochondrial Interactosome Model: Metabolon Membrane Proteins Complex Involved in the Channeling of ADP/ATP." Int. J. Mol. Sci. 13, no. 2: 1858-1885.