Biochemical and biophysical properties of the CO-sensing transcriptional activator CooA

被引:90
作者
Aono, S [1 ]
机构
[1] Okazaki Natl Res Inst, Ctr Integrat Biosci, Okazaki, Aichi 4448585, Japan
关键词
D O I
10.1021/ar020097p
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Studies of heme-containing gas sensor proteins have revealed a novel function for heme, which acts as an active site for sensing the corresponding gas molecule of a physiological effector. Heme-based O-2, NO, and CO sensor proteins have now been described in which these gas molecules act as a signaling factor that regulates the functional activity of the sensor proteins. CooA is a CO-sensing transcriptional activator found in the photosynthetic bacterium Rhodospirillum rubrum. The binding of CO to the heme group stimulates the transcriptional activator activity of CooA. The mechanisms of CO sensing by CooA and CO-dependent activation of CooA have now been analyzed by both molecular biological and spectroscopic studies and are discussed in this Account.
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页码:825 / 831
页数:7
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