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Protein translocation into mitochondria
Author(s) -
Káldi Krisztina,
Neupert Walter
Publication year - 1998
Publication title -
biofactors
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 94
eISSN - 1872-8081
pISSN - 0951-6433
DOI - 10.1002/biof.5520080308
Subject(s) - chromosomal translocation , mitochondrion , microbiology and biotechnology , chemistry , computational biology , biophysics , biology , biochemistry , gene
The mitochondrial membranes contain translocation machineries (“preprotein translocases”) which facilitate transport of proteins from the cytosol into the mitochondria. The TOM complex is localized in the outer membrane. Two translocases have been characterized in the inner membrane: the Tim23‐Tim17 complex and the Tim22 complex which differ in their specificities for preproteins. The TOM and TIM complexes can act in a coordinated fashion to facilitate the insertion of preproteins into the mitochondrial membranes as well as the translocation into the internal compartments, the intermembrane space and the matrix. We discuss insights into the function of components of the translocases, illustrated by examples for mechanisms of protein sorting into the different compartments of mitochondria.