J. Biochem, 1988, Vol. 104, No. 4 526-530
© 1988 Japanese Biochemical Society
research-article |
Molecular Cloning and Expression of a Gene for a Factor Which Stabilizes Formation of Inhibitor-Mitochondrial ATPase Complex from Saccharomyces cerevisiae
*Department of Biochemistry Toagosei Chemical Industry Co., Ltd., Minato-ku, Nagoya, Aichi 455
**Department of Molecular Physiology, Osaka University Medical School Kita-ku, Osaka, Osaka 530
***Laboratory of Molecular Genetics, Riken (The Institute of Physical and Chemical Research) Tsukuba Life Science Center, Tsukuba, Ibaraki 305
1To whom correspondence should be addressed
Stabilizing factor, a 9 kDa protein, stabilizes and facilitates formation of the complex between mitochondrial ATP synthase and its intrinsic inhibitor protein. A clone containing the gene encoding the 9 kDa protein was selected from a yeast genomic library to determine the structure of its precursor protein. As deduced from the nucleotide sequence, the precursor of the yeast 9 kDa stabilizing factor contains 86 amino acid residues and has a molecular weight of 10,062. From the predicted sequence we infer that the stabilizing factor precursor contains a presequence of 23 amino acid residues at its amino terminus. We also used S1 mapping to determine the initiation site of transcription under glucose-repressed or derepressed conditions. These experiments suggest that transcription of this gene starts at three different sites and that only one of them is not affected by the presence of glucose.
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