Complex formation and turnover of mitochondrial transporters and ion channels

Journal of Bioenergetics and Biomembranes
Gavin P McStay

Abstract

Mitochondria are responsible for many vital cellular functions in eukaryotic cells, such as ATP production, steroid synthesis and prosthetic group biogenesis. The vital functions of mitochondria are possible due to the compartmental nature of this organelle. Mitochondria form a dynamic network that can exist as a network throughout a cell or as distinct individual structures. Mitochondria are also composed of two membranes, an inner and outer membrane. The inner mitochondrial membrane (IMM) is significantly larger than the outer membrane and must fold upon itself to be contained within the outer mitochondrial membrane (OMM). These folds are known as cristae. Altogether these different membrane compartments specialize in different functions of the mitochondria. The OMM is responsible for passage of small metabolites into and out of the mitochondria while excluding macromolecules. The IMM is a highly selective barrier between the solutes of the cytosol and those within the mitochondrial matrix. Cristae specialize in oxidative phosphorylation. The functions of these membranes are afforded by membrane proteins that are able to transport specific solutes. The appropriate localization, assembly into multi-subunit protein complexes, a...Continue Reading

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Oct 8, 2016·Journal of Bioenergetics and Biomembranes·Pablo M PeixotoElizabeth Jonas

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