|
ナカムラ ノブヒロ
NAKAMURA NOBUHIRO
中村 暢宏 所属 京都産業大学 生命科学部 先端生命科学科 職種 教授 |
|
| 言語種別 | 英語 |
| 発行・発表の年月 | 2003 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Structural integrity of the Golgi is temperature sensitive in conditional-lethal mutants with no detectable GM130 |
| 執筆形態 | その他 |
| 掲載誌名 | Traffic |
| 出版社・発行元 | BLACKWELL MUNKSGAARD |
| 巻・号・頁 | 4(4),pp.254-272 |
| 著者・共著者 | Vasile, E.,Perez, T.,Nakamura, N.,Krieger, M. |
| 概要 | At 39.5degreesC in the temperature-sensitive, conditional-lethal mutant IdIG, glycoprotein processing is disrupted and secretion is blocked. The ultrastructure of the Golgi apparatus in IdIG cells was examined using immunofluorescence and immunoelectron microscopy. At 34 degreesC the structure of the Golgi apparatus was normal, whereas after incubation at 39.5 degreesC for 12 h it disassembled into dispersed vesicles. These reassembled into stacks when cells were returned to 34 degreesC for 6 h. At both 34 and 39.5 degreesC, all Golgi markers examined were present at wild-type levels except GM130, which was undetectable (<5% of control). Transfection with GM130 corrected the mutant phenotypes. Although the endogenous gene encoding NSF is apparently normal in IdIG cells, all mutant phenotypes were corrected by transfection with NSF, suggesting that NSF functioned as an extragenic suppressor. These findings provide additional support for a role of GM130 in determining the properties of the Golgi apparatus and for NSF in influencing GM130 stability and function. They also suggest that, at 34 degreesC, detectable levels of GM130 are not required for normal Golgi morphology and function, but that GM130 - or a GM130-dependent protein(s) - does play a role in protecting the Golgi, and thus the cells, from stress at higher temperatures . |
| DOI | 10.1034/j.1600-0854.2003.00080.x |
| ISSN | 1398-9219 |
| Put Code(ORCID) | 19809415 |