TRPA (channel)

transient receptor potential cation channel, subfamily A, member 1
Identifiers
Symbol	TRPA1
Alt. symbols	ANKTM1
IUPHAR	485
Entrez	8989
HUGO	497
OMIM	604775
RefSeq	NM_007332
UniProt	O75762
Other data
Locus	Chr. 8 q13

TRPA is a family of transient receptor potential ion channels.

The sole member of the TRPA sub-family, TRPA1, contains 14 N-terminal ankyrin repeats and is believed to function as a mechanical stress sensor. It is expressed in the dorsal root ganglion, trigeminal ganglion, and hair cells. The temperature sensitivity of TRPA1 is highly disputed, with some reports claiming that it is activated by noxiously cold stimuli and others disputing such a claim. TRPA1 is known to be activated by compounds capable of forming covalent chemical bonds with the protein's cysteins like isothiocyanates, which are the pungent chemicals in substances such as mustard oil and wasabi and Michael acceptors such as cinnamaldehyde in cinnamon, amongst numerous other substances. Non-covalent activators of TRPA1 also exists, such as methyl salicylate in winter green oil and the synthetic compound PF-4840154.

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