The activity of the gluconate-H+ symporter of Schizosaccharomyces pombe cells is down-regulated by D-glucose and exogenous cAMP

被引:14
作者
Caspari, T
Urlinger, S
机构
[1] Lehrst. F. Zellbiologie und P., Universität Regensburg
[2] Max-Planck-Institut F. Biochemie, D-82152 Martinsried
关键词
gluconate transport; cAMP; carrier regulation; Schizosaccharomyces pombe;
D O I
10.1016/0014-5793(96)01052-6
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Schizosaccharomyces pombe cells take up D-gluconate, as an alternative carbon source for growth, during glucose starvation or when cultured on glycerol-containing medium, Gluconate uptake is not detectable while cells are growing logarithmically on glucose. The addition of D-glucose as well as its non-metabolizable analogues to glycerol-grown cells causes an immediate loss of gluconate transport within 1 min. The reversible down-regulation of the gluconate carrier occurs after glucose has been internalized. This regulation is triggered not only by D-glucose but also by extracellular cAMP even in the absence of the cAMP-dependent protein kinase (PKA1).
引用
收藏
页码:272 / 276
页数:5
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