共 43 条
Evidence that Golgi structure depends on a p115 activity that is independent of the vesicle tether components giantin and GM130
被引:94
作者:

Puthenveedu, MA
论文数: 0 引用数: 0
h-index: 0
机构:
Carnegie Mellon Univ, Dept Biol Sci, Pittsburgh, PA 15213 USA Carnegie Mellon Univ, Dept Biol Sci, Pittsburgh, PA 15213 USA

Linstedt, AD
论文数: 0 引用数: 0
h-index: 0
机构:
Carnegie Mellon Univ, Dept Biol Sci, Pittsburgh, PA 15213 USA Carnegie Mellon Univ, Dept Biol Sci, Pittsburgh, PA 15213 USA
机构:
[1] Carnegie Mellon Univ, Dept Biol Sci, Pittsburgh, PA 15213 USA
关键词:
Golgi structure;
tether;
docking;
mitosis;
COPI;
D O I:
10.1083/jcb.200105005
中图分类号:
Q2 [细胞生物学];
学科分类号:
071009 ;
090102 ;
摘要:
Inhibition of the putative coatomer protein I (COPI) vesicle tethering complex, giantin-p115-GM130, may contribute to mitotic Golgi breakdown. However, neither this, nor the role of the giantin-p115-GM130 complex in the maintenance of Golgi structure has been demonstrated in vivo. Therefore, we generated antibodies directed against the mapped binding sites in each protein of the complex and injected these into mammalian tissue culture cells. Surprisingly, the injected anti-p115 and antigiantin antibodies caused proteasome-mediated degradation of the corresponding antigens. Reduction of p115 levels below detection led to COPI-dependent Golgi fragmentation and apparent accumulation of Golgi-derived vesicles. In contrast, neither reduction of giantin below detectable levels, nor inhibition of p115 binding to GM130, had any detectable effect on Golgi structure or Golgi reassembly after cell division or brefeldin A washout. These observations indicate that inhibition of p115 can induce a mitotic-like Golgi disassembly, but its essential role in Golgi structure is independent of its Golgi-localized binding partners giantin and GM130.
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页码:227 / 237
页数:11
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