固氮蓝藻串珠鱼腥藻中钾依赖性Kdp-ATP酶表达的调控
Regulation of potassium-dependent Kdp-ATPase expression in the nitrogen-fixing cyanobacterium Anabaena torulosa.
作者信息
Alahari A, Ballal A, Apte S K
机构信息
Cell Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
出版信息
J Bacteriol. 2001 Oct;183(19):5778-81. doi: 10.1128/JB.183.19.5778-5781.2001.
Abstract
The KdpB polypeptides in the cyanobacterium Anabaena torulosa were shown to be two membrane-bound proteins of about 78 kDa, expressed strictly under K(+) deficiency and repressed or degraded upon readdition of K(+). In both Anabaena and Escherichia coli strain MC4100, osmotic and ionic stresses caused no significant induction of steady-state KdpB levels during extreme potassium starvation.
摘要
已证明念珠藻中的KdpB多肽是两种约78 kDa的膜结合蛋白，仅在钾缺乏时表达，重新添加钾后受到抑制或降解。在念珠藻和大肠杆菌菌株MC4100中，在极度钾饥饿期间，渗透和离子胁迫均未导致KdpB稳态水平的显著诱导。
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