Abstract:
:We present a noninvasive approach to track activation of ATP-gated P2X receptors and potentially other transmitter-gated cation channels that show calcium fluxes. We genetically engineered rat P2X receptors to carry calcium sensors near the channel pore and tested this as a reporter for P2X(2) receptor opening. The method has several advantages over previous attempts to image P2X channel activation by fluorescence resonance energy transfer (FRET): notably, it reports channel opening rather than a conformation change in the receptor protein. Our FRET-based imaging approach can be used as a general method to track, in real time, the location, regional expression variation, mobility and activation of transmitter-gated P2X channels in living neurons in vitro and in vivo. This approach should help to determine when, where and how different receptors are activated during physiological processes.
journal_name
Nat Methodsjournal_title
Nature methodsauthors
Richler E,Chaumont S,Shigetomi E,Sagasti A,Khakh BSdoi
10.1038/nmeth1144subject
Has Abstractpub_date
2008-01-01 00:00:00pages
87-93issue
1eissn
1548-7091issn
1548-7105pii
nmeth1144journal_volume
5pub_type
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