Molecular Target Synopsis
Domains and Structures
Drugs and Clinical Candidates
Ligand Efficiency Plot
Family Cladogram
Interaction Network
Gene Expression
Gene Copy Number Variation
Germline Genetics

TRPM5 (Q9NZQ8) - Overview - Molecular Target Synopsis


TRPM5, Transient receptor potential cation channel subfamily M member 5
UniProt Q9NZQ8

Also Known as TRPM5_HUMAN, TRPM5, LTRPC5, MTR1

Voltage-modulated Ca(2+)-activated, monovalent cation channel (VCAM) that mediates a transient membrane depolarization and plays a central role in taste transduction. Monovalent-specific, non-selective cation channel that mediates the transport of Na(+), K(+) and Cs(+) ions equally well. Activated directly by increases in intracellular Ca(2+), but is impermeable to it. Gating is voltage-dependent and displays rapid activation and deactivation kinetics upon channel stimulation even during sustained elevations in Ca(2+). Also activated by a fast intracellular Ca(2+) increase in response to inositol 1,4,5-triphosphate-producing receptor agonists. The channel is blocked by extracellular acidification. External acidification has 2 effects, a fast reversible block of the current and a slower irreversible enhancement of current inactivation. Is a highly temperature-sensitive, heat activated channel showing a steep increase of inward currents at temperatures between 15 and 35 degrees Celsius. Heat activation is due to a shift of the voltage-dependent activation curve to negative potentials. Activated by arachidonic acid in vitro. May be involved in perception of bitter, sweet and umami tastes. May also be involved in sensing semiochemicals.

Isoforms / Transcripts (Protein Coding)

Sub-cellular localization

UniProt: TRPM5 is active in the following subcellular-locations: cell membrane.
GO terms: TRPM5 is active in the following subcellular-locations: dendrite, integral component of membrane, neuronal cell body, plasma membrane.

GO terms

Gene Copy Number Variation

In COSMIC - Cell Lines Project TRPM5 has gain in 0 cell-lines, loss in 2 cell-lines and no signal in 999 cell-lines. (see details)

Gene Expression

In NCI60, the highest expressing cell lines are: HS578T, ACHN, 786_0

In Array Express (RNA-seq of 675 commonly used human cancer cell lines), the highest expressing cell lines are: Hs 746T, NCI-H209, LN-18

In Array Express (RNA-seq of long poly adenylated RNA and long non poly adenylated RNA from ENCODE cell lines), the highest expressing cell lines are: SK-N-SH, NHLF, HSMM

(see details)

3D Structures

At greater than 35% identity similarity to TRPM5 there are:
14 structures (56 chains) solved
7 are solved in complex with at least one small molecule ligand

(see details)
Molecular Target 3D Synopsis

Screening and Chemistry

TRPM5 has been screened with 1 compounds (2 bioactivities). (see details)