Expression of Tom34 Splicing Isoforms in Mouse Testis and Knock-out of Tom34 in Mice
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概要
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The 34-kDa translocase of the outer mitochondrial membrane (Tom34) is a putative mammalian-specific factor involved in protein import into mitochondria. We ana-lyzed the genomic sequence of the mouse Tom34 gene and found it has two alternative initial exons. Using reverse transcription and the polymerase chain reaction (RT-PCR), we found that these two mRNAs differs only in the 5'-proximal sequences corre-sponding to the two initial exons (exon 1a and 1b). Tom34 mRNA with exon 1a (Tom34a) is expressed ubiquitously, while that with exon 1b (Tom34b) is expressed only in mature testicular germ cells. To explore the in vivo function of Tom34 pro-teins, we generated Tom34-deficient mice by targeted disruption. The Tom34-|- mice were viable and grew normally and had a normal Mendelian inheritance pattern. Male as well as female Tom34-|- mice were fertile. In vitro-preprotein import into iso-lated mitochondria showed no apparent difference between Tom34-|- and wild-type mice. These results indicate that Tom34 is dispensable for mouse growth and develop-ment under optimal conditions.
- 社団法人 日本生化学会の論文
著者
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Kiyonari Hiroshi
Laboratory For Animal Resources And Genetic Engineering Center For Developmental Biology Riken
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Mori Masataka
Department Of Electrical Engineering Nagaoka University Of Technology
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Takeda Naoki
Division Of Transgenic Technology Center For Animal Resources And Development (card) Kumamoto Univer
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Ueno Shota
Department Of Molecular Genetics Kumamoto University School Of Medicine
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Imai Tomoaki
Department Of Science For Laboratory Animal Experimentation Research Institute For Microbial Disease
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Abe Shinichi
Department Of Anatomy Tokyo Dental College
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Terada Kazutoyo
Department Of Chemistry Faculty Of Science Kyoto University
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Aizawa Shinichi
Laboratory For Animal Resources And Genetic Engineering Riken Center For Developmental Biology
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Yomogida Kentaro
Department Of Science For Laboratory Animal Experimentation Research Institute For Microbial Disease
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Yano Masato
Department of Bioscience and Bioinformatics, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Iizuka, Fukuoka 820-8502, Japan
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Yomogida Kentaro
Department of Science for Laboratory Animal Experimentation, Research Institute for Microbial Diseases, Osaka University
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