A steep Ca2+-dependence of a K+ channel in a unicellular green alga

被引：8

作者：

Bauer, CS

Plieth, C

Hansen, UP

Simonis, W

Schönknecht, G

机构：

[1] Univ Wurzburg, D-97082 Wurzburg, Germany

[2] Univ Kiel, Inst Phys Appl, D-24098 Kiel, Germany

来源：

JOURNAL OF EXPERIMENTAL BOTANY | 1998年 / 49卷 / 327期

关键词：

Eremosphaera viridis; plasma membrane; Ca2+-dependent K+ channel; co-operative binding;

D O I：

10.1093/jexbot/49.327.1761

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

An increase of cytosolic Ca2+ in the unicellular green alga Eremosphaera viridis activates Ca2+-dependent Ki channels causing a hyperpolarization of the plasma membrane. Data from parallel calcium, and potential measurements were combined with I/V relationships. This yielded a steep Ca2+-dependence of K+ channels with a co-operativity of 4 and an affinity of 300 nM.

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收藏

页码：1761 / 1765

页数：5

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