Ubiquitin Pathway Proteins Influence the Mechanism of Action of the Novel Immunosuppressive Drug FTY720 in Saccharomyces cerevisiae*
Ubiquitin Pathway Proteins Influence the Mechanism of Action of the Novel Immunosuppressive Drug FTY720 in Saccharomyces cerevisiae*
复制标题
泛素通路蛋白影响酿酒酵母中新型免疫抑制药物 FTY720 的作用机制*
DOI：
10.1074/jbc.m213144200
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发表时间：
2003
影响因子：
4.8
通讯作者：
N. Movva
中科院分区：
文献类型：
--
作者：
Carole A. Welsch;S. Hagiwara;Jean Francois Goetschy;N. Movva
FTY720 is an immunosuppressive drug in clinical development for transplant graft protection in humans. This agent is of particular interest because, unlike currently available regimes, it acts to sequester lymphocytes without causing cytotoxicity or blocking differentiation and growth potential. In an effort to elucidate the mechanism of action of FTY720, and identify its downstream effectors, we have screened genomic libraries and spontaneous mutants of the model system Saccharomyces cerevisiae for resistance to FTY720. We identified several proteins and pathways as being involved in the mechanism of action of FTY720. We show specifically that the two amino acid transporters TAT1 and TAT2, the two ubiquitin proteases UBP5 and UBP11, and the heat shock protein CAJ1 confer growth resistance to FTY720 when overexpressed. Another amino acid transporter, GNP1, and the ubiquitin structural gene UBI4 as well as the ubiquitin ligase RSP5, and its binding protein BUL1 confer growth resistance in a mutated form. Supporting the importance of amino acid transport in the growth resistance phenotype of S. cerevisiae to the immunosuppressive agent FTY720, a prototrophic strain was more resistant to FTY720 than the isogenic auxotroph. To further explore these results, the effects on amino acid uptake and protein degradation were measured in the presence of FTY720. Due to the high conservation of these proteins and pathways between yeast and humans, these results may provide valuable insights into the mechanism of action of FTY720 in lymphocyte sequestration in humans.
泛素代谢影响酵母中挥发性麻醉剂的细胞反应。
影响因子：
5.3
作者：
Wolfe,D;Reiner,T;Keeley,JL;Pizzini,M;Keil,RL
通讯作者：
Keil,RL
与淋巴细胞归巢相关的细胞表面分子是泛素化的支链糖蛋白。
DOI：
10.1126/science.3003913
发表时间：
1986
期刊：
Science (New York, N.Y.)
影响因子：
--
作者：
Siegelman,M;Bond,MW;Gallatin,WM;StJohn,T;Smith,HT;Fried,VA;Weissman,IL
通讯作者：
Weissman,IL