title: Translocation of proteins across the mitochondrial inner membrane, but not into the outer membrane, requires nucleoside triphosphates in the matrix.
abstract: Work in several laboratories has established that import of proteins across the mitochondrial inner membrane requires an electrochemical potential across that membrane and cleavage of nucleoside triphosphate. We now show that nucleoside triphosphate must be present inside the inner membrane. In contrast, the potential-independent insertion of porin into the outer membrane requires ATP only outside the inner membrane.
authors.affiliation: Biocenter, University of Basel, Switzerland.
authors.forename: S T
authors.initials: ST
authors.lastname: Hwang
authors.forename: G
authors.initials: G
authors.lastname: Schatz
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D001425:Bacterial Outer Membrane Proteins / Q000378:metabolism; D006160:Guanosine Triphosphate / Q000378:metabolism; D007425:Intracellular Membranes / Q000187:drug effects / Q000378:metabolism*; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D042844:L-Lactate Dehydrogenase (Cytochrome); D008928:Mitochondria / Q000378:metabolism*; D018272:Porins; D011190:Potassium Cyanide / Q000494:pharmacology; D011506:Proteins / Q000378:metabolism*; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D012265:Ribonucleotides / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D013762:Tetrahydrofolate Dehydrogenase / Q000235:genetics / Q000378:metabolism; D014634:Valinomycin / Q000494:pharmacology
chemical_list: D001425:Bacterial Outer Membrane Proteins; D018272:Porins; D011506:Proteins; D011993:Recombinant Fusion Proteins; D012265:Ribonucleotides; D014634:Valinomycin; D006160:Guanosine Triphosphate; D000255:Adenosine Triphosphate; D007770:L-Lactate Dehydrogenase; D042844:L-Lactate Dehydrogenase (Cytochrome); D013762:Tetrahydrofolate Dehydrogenase; D011190:Potassium Cyanide