2006年8月
Identification of Tam41 maintaining integrity of the TIM23 protein translocator complex in mitochondria
JOURNAL OF CELL BIOLOGY
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- 巻
- 174
- 号
- 5
- 開始ページ
- 631
- 終了ページ
- 637
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1083/jcb.200603087
- 出版者・発行元
- ROCKEFELLER UNIV PRESS
Newly synthesized mitochondrial proteins are imported into mitochondria with the aid of protein translocator complexes in the outer and inner mitochondrial membranes. We report the identification of yeast Tam41, a new member of mitochondrial protein translocator systems. Tam41 is a peripheral inner mitochondrial membrane protein facing the matrix. Disruption of the TAM41 gene led to temperature-sensitive growth of yeast cells and resulted in defects in protein import via the TIM23 translocator complex at elevated temperature both in vivo and in vitro. Although Tam41 is not a constituent of the TIM23 complex, depletion of Tam41 led to a decreased molecular size of the TIM23 complex and partial aggregation of Pam18 and - 16. Import of Pam16 into mitochondria without Tam41 was retarded, and the imported Pam16 formed aggregates in vitro. These results suggest that Tam41 facilitates mitochondrial protein import by maintaining the functional integrity of the TIM23 protein translocator complex from the matrix side of the inner membrane.
- リンク情報
- ID情報
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- DOI : 10.1083/jcb.200603087
- ISSN : 0021-9525
- PubMed ID : 16943180
- Web of Science ID : WOS:000240230100004