One of the chloroplast envelope ion channels is probably related to the mitochondrial VDAC

FEBS Letters

Pottosin, Igor I.¹ 

[1] Laboratory of Membrane Biophysics, Institute for Cell Biophysics, Russian Academy of Sciences, Pushchino (Moscow Region 142292, Russian Federation

关键词: Chloroplast;    Ion channel;    Voltage dependence;    Patch clamp;   

DOI  :  10.1016/0014-5793(93)80275-Y

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The voltage dependence of large conductance channels in the intact chloroplast envelope of Nitellopsis obtusa was examined using the patch-clamp technique. The channel switched to the lower conducting substates with amplitudes of around 45 and 20% of that in the open state when potentials larger than 30 mV were applied. The steepness of the voltage dependence approximately corresponds to 4 elementary charges being transferred across the entire voltage drop to close the channel both at positive and negative potentials. The transition to the closed substates could also be induced by König's polyanion, a well known modulator of the mitochondrial outer membrane channel.

【 授权许可】

Unknown