Biochim Biophys Acta. 2013 Dec;1833(12):3025-34. doi: 10.1016/j.bbamcr.2013.08.014. Epub 2013 Aug 28.

Transient receptor potential ankyrin-1 (TRPA1) modulates store-operated Ca(2+) entry by regulation of STIM1-Orai1 association.External 2231691f894ba696de1310221b0a0dbbb31a7251e75115c265587c3d9d5f507c

Albarran, L., Lopez, J. J., Dionisio, N., Smani, T., Salido, G. M., Rosado, J. A.,
["Department of Physiology (Cell Physiology Research Group), University of Extremadura, 10003-Caceres, Spain."]
TRPA1 is a non-selective Ca(2+) permeable channel located in the plasma membrane that functions as a cellular sensor detecting mechanical, chemical and thermal stimuli, being a component of neuronal, epithelial, blood and smooth muscle tissues. TRPA1 has been shown to influence a broad range of physiological processes that involve Ca(2+)-dependent signaling pathways. Here we report that TRPA1 is expressed in MEG01 but not in platelets at the protein level. MEG01 cells maturation induced by PMA results in attenuation of TRPA1 protein expression and enhances thapsigargin-evoked Ca(2+) entry without altering the release of Ca(2+) from intracellular stores. Inhibition of TRPA1 by HC-030031 results in enhancement of both thrombin- and thapsigargin-stimulated Ca(2+) entry. Co-immunoprecipitation experiments revealed that TRPA1 associates with STIM1, as well as Orai1, TRPC1 and TRPC6. Downregulation of TRPA1 expression by MEG01 maturation, as well as pharmacological inhibition of TRPA1 by HC-030031, results in enhancement of the association between STIM1 and Orai1. Altogether, these findings provide evidence for a new and interesting function of TRPA1 in cellular function associated to the regulation of agonist-induced Ca(2+) entry by the modulation of STIM1/Orai1 interaction.
PMID: 23994313External 2231691f894ba696de1310221b0a0dbbb31a7251e75115c265587c3d9d5f507c
Screening Toggle 893349bafcc528f8346c51dc3420151d67b0126b2c122dd1017121c03fa0f69b
  Experimental screening Non-experimental screening Reference
TRP channel construct Interactor source
TRP channel Interactor Method Species Region Species Organ/tissue Sample type
TRPA1 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 Orai1 Inference Prediction 23994313
TRPA1 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 STIM1 Inference Prediction 23994313
TRPA1 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 TRPC1 Inference Prediction 23994313
TRPA1 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 TRPC6 Inference Prediction 23994313
TRPC1 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 TRPA1 Inference Prediction 23994313
TRPC6 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 TRPA1 Inference Prediction 23994313
(Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4: click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)
Validation: In vivo validation Toggle 893349bafcc528f8346c51dc3420151d67b0126b2c122dd1017121c03fa0f69b
  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
TRPA1 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 Orai1 Co-immunoprecipitation MEG-01 23994313
TRPA1 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 STIM1 Co-immunoprecipitation MEG-01 23994313
TRPA1 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 TRPC1 Co-immunoprecipitation MEG-01 23994313
TRPA1 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 TRPC6 Co-immunoprecipitation MEG-01 23994313
TRPC1 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 TRPA1 Co-immunoprecipitation MEG-01 23994313
TRPC6 Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4 TRPA1 Co-immunoprecipitation MEG-01 23994313
(Link 2bd4d11adb659cddf58197a94e201f0a44c55d8d7cb427c624971b42e122c0a4: click the arrow icon to show interactions only between the corresponding TRP channel and the interactor)
TRP / Interactor

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