Ergosterol promotes pheromone signaling and plasma membrane fusion in mating yeast.

Ergosterol promotes pheromone signaling and plasma membrane fusion in mating yeast.
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麦角固醇促进交配酵母中的信息素信号传导和质膜融合。

DOI:
10.1083/jcb.200705076
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发表时间:
2008-02-25
影响因子:
7.8
通讯作者:
Grote, Eric
Grote, Eric
中科院分区:
生物学1区
文献类型:
--
作者:
Jin, Hui;McCaffery, J. Michael;Grote, Eric

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麦角固醇消耗独立地抑制酵母交配的两个方面:信息素信号传导和质膜融合。在信号传导中,麦角固醇参与将Ste 5募集到质膜上的极化位点。麦角固醇被认为通过与鞘脂的长酰基链相互作用在膜内形成微区。我们发现,虽然无鞘脂的麦角固醇集中在细胞-细胞接触的网站,信息素信号在接触网站的传输取决于一个平衡的比例麦角固醇鞘脂。如果一个交配对之间的形式麦角甾醇耗尽细胞尽管减弱信息素的反应,随后的过程中膜融合是滞后的。Prm 1也参与膜融合。然而,麦角固醇和Prm 1具有独立的功能,并且只有Prm 1突变体交配对容易发生接触依赖性裂解。与信号传导相反,质膜融合对鞘脂消耗相对不敏感。因此,麦角固醇的无鞘脂池促进质膜融合。
Ergosterol depletion independently inhibits two aspects of yeast mating: pheromone signaling and plasma membrane fusion. In signaling, ergosterol participates in the recruitment of Ste5 to a polarized site on the plasma membrane. Ergosterol is thought to form microdomains within the membrane by interacting with the long acyl chains of sphingolipids. We find that although sphingolipid-free ergosterol is concentrated at sites of cell–cell contact, transmission of the pheromone signal at contact sites depends on a balanced ratio of ergosterol to sphingolipids. If a mating pair forms between ergosterol-depleted cells despite the attenuated pheromone response, the subsequent process of membrane fusion is retarded. Prm1 also participates in membrane fusion. However, ergosterol and Prm1 have independent functions and only prm1 mutant mating pairs are susceptible to contact-dependent lysis. In contrast to signaling, plasma membrane fusion is relatively insensitive to sphingolipid depletion. Thus, the sphingolipid-free pool of ergosterol promotes plasma membrane fusion.
DOI: 10.1126/science.282.5393.1511
发表时间: 1998-11-20
期刊: SCIENCE
影响因子: 56.9
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Butty, AC;Pryciak, PM;Peter, M
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发表时间: 2004-05-01
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发表时间: 1999-12-01
影响因子: 3.3
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Grote, E;Novick, PJ
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DOI: 10.1083/jcb.200107135
发表时间: 2002-01-21
期刊: The Journal of cell biology
影响因子: --
作者:
deHart AK;Schnell JD;Allen DA;Hicke L
通讯作者: Hicke L