EVIDENCE THAT THE LONG-LIFETIME PHOTOINTERMEDIATE OF S-RHODOPSIN IS A RECEPTOR FOR NEGATIVE PHOTOTAXIS IN HALOBACTERIUM-HALOBIUM
EVIDENCE THAT THE LONG-LIFETIME PHOTOINTERMEDIATE OF S-RHODOPSIN IS A RECEPTOR FOR NEGATIVE PHOTOTAXIS IN HALOBACTERIUM-HALOBIUM
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DOI：
10.1016/s0006-291x(85)80131-5
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发表时间：
1985-01-01
影响因子：
3.1
通讯作者：
KOBATAKE, Y
中科院分区：
文献类型：
--
作者：
TAKAHASHI, T;MOCHIZUKI, Y;KOBATAKE, Y
研究了蓝色背景光对 H. halobium 对绿橙色引诱光阶梯式刺激的行为反应的影响。 s-视紫红质的一种长寿命光中间体显然是驱避光的光感受器：当细胞持续受到蓝光照射时，绿橙色光的阶梯式增加可从吸引刺激转变为驱避刺激。在同时缺乏细菌视紫红质和盐菌视紫红质的突变菌株与野生型菌株之间没有观察到蓝色背景光的阈值强度的差异，这表明2个光驱动离子泵不参与感测引诱剂光。
The effect of blue background light on behavioral response of H. halobium to step-like stimulation with green-orange attractant light was examined. A long-lifetime photointermediate of s-rhodopsin apparently is the photoreceptor for repellent light: the step-like increase in green-orange light was convertible from attractant stimulus to repellent one, when the cells were constantly illuminated with blue light. No difference of the threshold intensity of the blue background light was observed between the mutant strain that lacks both bacteriorhodopsin and halorhodopsin and the wild type strain, suggesting that the 2 light-driven ion pumps are not participant in sensing attractant light.