Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10883180 | Mitochondrion | 2011 | 12 Pages |
Abstract
Mitochondrial DNA (mtDNA) is generally packaged into the mitochondrial nucleoid (mt-nucleoid) by a high-mobility group (HMG) protein. Glom is an mtDNA-packaging HMG protein in Physarum polycephalum. Here we identified a new mtDNA-packaging protein, Glom2, which had a region homologous with yeast Mgm101. Glom2 could bind to an entire mtDNA and worked synergistically with Glom for condensation of mtDNA in vitro. Down-regulation of Glom2 enhanced the alteration of mt-nucleoid morphology and the loss of mtDNA induced by down-regulation of Glom, and impaired mRNA accumulation of some mtDNA-encoded genes. These data suggest that Glom2 may organize the mt-nucleoid coordinately with Glom.
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Authors
Kie Itoh, Akiko Izumi, Toshiyuki Mori, Naoshi Dohmae, Ryoko Yui, Katsura Maeda-Sano, Yuki Shirai, Masahiro M. Kanaoka, Tsuneyoshi Kuroiwa, Tetsuya Higashiyama, Mamoru Sugita, Kimiko Murakami-Murofushi, Shigeyuki Kawano, Narie Sasaki,