Biochem J. 2000 Sep 15;350 Pt 3:631-5.
Coupling between inositol 1,4,5-trisphosphate receptors and human transient receptor potential channel 1 when intracellular Ca2+ stores are depleted.
Rosado, J. A., Sage, S. O.,
["Department of Physiology, University of Cambridge, Downing Street, Cambridge CB2 3EG, U.K."]
["Department of Physiology, University of Cambridge, Downing Street, Cambridge CB2 3EG, U.K."]
In the present study we have investigated the role of inositol 1,4, 5-trisphosphate (IP(3)), functional IP(3) receptors (IP(3)Rs) and the human homologue of the Drosophila transient receptor potential (Trp) channel, human Trp1 (hTrp1), in store-mediated Ca(2+) entry (SMCE) in human platelets. Inhibition of IP(3) recycling using Li(+), or the inhibition of IP(3)Rs using xestospongin C, both resulted in the inhibition of SMCE activation following Ca(2+) store depletion using thapsigargin. Co-immunoprecipitation experiments indicated that endogenously expressed hTrp1 couples with IP(3)R type II, but not types I or III, in platelets with depleted intracellular Ca(2+) stores, but not in control, undepleted cells. These results provide strong evidence for the activation of SMCE by conformational coupling involving de novo association between IP(3)Rs and a plasma membrane channel in normal human cells.
PMID: 10970773
 Screening
Validation: In vitro validation
Validation: In vivo validation
Characterization
Functional consequence
|
top
|
Screening
|
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Experimental screening | Non-experimental screening | Reference | ||||||||
| TRP channel construct | Interactor source | |||||||||
| TRP channel | Interactor | Method | Species | Region | Species | Organ/tissue | Sample type | |||
| TRPC1 |
|
IP3R2 | Inference | Prediction | 10970773 | |||||
(:
click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)
:
click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)
|
Screening
Validation: In vitro validation
Validation: In vivo validation
Characterization
Functional consequence
|
top
|
| Validation: In vivo validation
|
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Assay with endogenous proteins | Assay with overexpressed proteins | Reference | ||||||||
| Cell or tissue | Cell or tissue | TRP channel construct | Interactor construct | |||||||
| TRP channel | Interactor | Method | Species | Region | Species | Region | ||||
| TRPC1 |
|
IP3R2 | Co-immunoprecipitation | Human platelets | 10970773 | |||||
(:
click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)
:
click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)