Physiological sensing of carbon dioxide/bicarbonate/pH via cyclic nucleotide signaling.

Physiological sensing of carbon dioxide/bicarbonate/pH via cyclic nucleotide signaling.
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DOI:
10.3390/s110202112
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发表时间:
2011
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Levin LR
Levin LR
中科院分区:
其他
文献类型:
--
作者:
Buck J;Levin LR

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二氧化碳(CO2)是生物体新陈代谢的副产品。在生理系统中,CO2通过无处不在的碳酸酐酶家族与碳酸氢盐(HCO 3 −)和pH明确相关,许多生物过程依赖于感知CO2,HCO 3,可溶性腺苷酸环化酶(sAC)直接受碳酸氢盐调节的发现提供了CO2/HCO 3/pH之间的联系。pH化学传感和信号通过广泛使用的第二信使环AMP。本文综述了碳酸氢盐调控的sAC,以及其他随后确定的碳酸氢盐调控的核苷酸环化酶,在各种生理系统中作为进化上保守的CO2/HCO 3/pH化学传感器发挥作用的证据。
Carbon dioxide (CO2) is produced by living organisms as a byproduct of metabolism. In physiological systems, CO2 is unequivocally linked with bicarbonate (HCO3−) and pH via a ubiquitous family of carbonic anhydrases, and numerous biological processes are dependent upon a mechanism for sensing the level of CO2, HCO3, and/or pH. The discovery that soluble adenylyl cyclase (sAC) is directly regulated by bicarbonate provided a link between CO2/HCO3/pH chemosensing and signaling via the widely used second messenger cyclic AMP. This review summarizes the evidence that bicarbonate-regulated sAC, and additional, subsequently identified bicarbonate-regulate nucleotidyl cyclases, function as evolutionarily conserved CO2/HCO3/pH chemosensors in a wide variety of physiological systems.
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