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A human homolog of the mitochondrial protein import receptor Mom19 can assemble with the yeast mitochondrial receptor complex
Author(s) -
Seki Naohiko,
Moczko Martin,
Nagase Takahiro,
Zufall Nicole,
Ehmann Bruno,
Dietmeier Klaus,
Schäfer Eberhard,
Nomura Nobuo,
Pfanner Nikolaus
Publication year - 1995
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(95)01229-8
Subject(s) - neurospora crassa , saccharomyces cerevisiae , mitochondrion , biology , yeast , inner mitochondrial membrane , biochemistry , complementary dna , receptor , microbiology and biotechnology , protein targeting , atp–adp translocase , mitochondrial carrier , membrane protein , bacterial outer membrane , gene , membrane , escherichia coli , mutant
Import of preproteins into mitochondria requires transport machineries in both mitochondrial membranes that have been characterized in Saccharomyces cerevisiae and Neurospora crassa . By cDNA analysis, we identified a human protein of 16 kDa with significant overall homology to the fungal mitochondrial import receptor Mom19, including the three typical characteristics: a hydrophobic N‐terminal segment, a tetratrico peptide motif in the middle and a negatively charged C‐terminus. The human Mom19 homolog is expressed in all tissues analyzed. When synthesized in vitro, the human Mom19 homolog is targeted to isolated yeast mitochondria and specifically associates with the outer membrane receptor complex, suggesting that indeed a mitochondrial import receptor was identified.