S-Space College of Medicine/School of Medicine (의과대학/대학원) Dept. of Physiology (생리학교실) Journal Papers (저널논문_생리학교실)
The specific activation of TRPC4 by Gi protein subtype
- Jeon, Jae-Pyo; Lee, Kyu Pil; Park, Eun Jung; Sung, Tae Sik; Kim, Byung Joo; Jeon, Ju-Hong; So, Insuk
- Issue Date
- Biochem Biophys Res Commun. 377 (2008) 538-543
- Animals; Calcium Channels/genetics/metabolism; Cell Line; GTP-Binding Protein alpha Subunit, Gi2/antagonists & inhibitors/genetics/*metabolism; Guanosine 5'-O-(3-Thiotriphosphate)/metabolism/pharmacology; Humans; Mice; Receptor, Muscarinic M2/genetics; TRPC Cation Channels/*agonists/metabolism; TRPV Cation Channels/genetics/metabolism
- The classical type of transient receptor potential channel (TRPC) is a molecular candidate for Ca(2+)-permeable cation channels in mammalian cells. Especially, TRPC4 has the similar properties to Ca(2+)-permeable nonselective cation channels (NSCCs) activated by muscarinic stimulation in visceral smooth muscles. In visceral smooth muscles, NSCCs activated by muscarinic stimulation were blocked by anti-Galphai/o antibodies. However, there is still no report which Galpha proteins are involved in the activation process of TRPC4. Among Galpha proteins, only Galphai protein can activate TRPC4 channel. The activation effect of Galphai was specific for TRPC4 because Galphai has no activation effect on TRPC5, TRPC6 and TRPV6. Coexpression with muscarinic receptor M2 induced TRPC4 current activation by muscarinic stimulation with carbachol, which was inhibited by pertussis toxin. These results suggest that Galphai is involved specifically in the activation of TRPC4.
- 1090-2104 (Electronic)
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