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Multiple pathways for sorting mitochondrial precursor proteins. 2008

Natalia Bolender, and Albert Sickmann, and Richard Wagner, and Chris Meisinger, and Nikolaus Pfanner
Institut für Biochemie und Molekularbiologie, Zentrum für Biochemie und Molekulare Zellforschung, Universität Freiburg, Germany.

Mitochondria import hundreds of different precursor proteins from the cytosol. More than 50% of mitochondrial proteins do not use the classical import pathway that is guided by amino-terminal presequences, but instead contain different types of internal targeting signals. Recent studies have revealed an unexpected complexity of the mitochondrial protein import machinery and have led to the discovery of new transport pathways. Here, we review the versatility of mitochondrial protein import and its connection to mitochondrial morphology, redox regulation and energetics.

UI MeSH Term Description Entries
D011498 Protein Precursors Precursors, Protein
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D051336 Mitochondrial Membranes The two lipoprotein layers in the MITOCHONDRION. The outer membrane encloses the entire mitochondrion and contains channels with TRANSPORT PROTEINS to move molecules and ions in and out of the organelle. The inner membrane folds into cristae and contains many ENZYMES important to cell METABOLISM and energy production (MITOCHONDRIAL ATP SYNTHASE). Inner Mitochondrial Membrane,Mitochondrial Membrane, Inner,Mitochondrial Membrane, Outer,Outer Mitochondrial Membrane,Inner Mitochondrial Membranes,Membrane, Inner Mitochondrial,Membrane, Mitochondrial,Membrane, Outer Mitochondrial,Membranes, Inner Mitochondrial,Membranes, Mitochondrial,Membranes, Outer Mitochondrial,Mitochondrial Membrane,Mitochondrial Membranes, Inner,Mitochondrial Membranes, Outer,Outer Mitochondrial Membranes
D020543 Proteome The protein complement of an organism coded for by its genome. Proteomes
D021381 Protein Transport The process of moving proteins from one cellular compartment (including extracellular) to another by various sorting and transport mechanisms such as gated transport, protein translocation, and vesicular transport. Cellular Protein Targeting,Gated Protein Transport,Protein Targeting, Cellular,Protein Translocation,Transmembrane Protein Transport,Vesicular Protein Transport,Protein Localization Processes, Cellular,Protein Sorting,Protein Trafficking,Protein Transport, Gated,Protein Transport, Transmembrane,Protein Transport, Vesicular,Traffickings, Protein
D024101 Mitochondrial Proteins Proteins encoded by the mitochondrial genome or proteins encoded by the nuclear genome that are imported to and resident in the MITOCHONDRIA. Proteins, Mitochondrial,Mitochondrial Protein,Protein, Mitochondrial

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