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BrMT

BrMT (6-bromo-2-mercaptotryptamine) is a neurotoxin found in the hypobranchial gland of the marine snail species Calliostoma canaliculatum. The disulfide-linked dimer of BrMT possesses inhibitory effects on the Kv1 and Kv4 families of voltage-gated potassium channels.

Chemistry
BrMT is a brominated tryptamine. It has a thiol group, allowing dimerization via a disulfide linkage. == Target ==
Target
Calliostoma canaliculatum deters predators by covering its shells with BrMT-containing mucus, in particular when exposed to a predator, such as Pycnopodia helianthoides or Pisaster giganteus. The BrMT dimer is known to affect voltage-gated potassium channels in the central nervous system. It strongly inhibits ShBΔ potassium channels, and to a lesser degree also isoforms found in humans (hKv1.1) and squid (sqKv1.A). It also affects members of Kv4 family (Kv4.1 and Kv4.2) and Drosophila ether-à-go-go channels. == Mode of action ==
Mode of action
The mode of action of BrMT involves inhibition of specific voltage gated potassium channels present in the nervous system. By stabilizing the voltage sensor of the ion channel, the opening of ShBΔ ion channels and other Kv1 members is inhibited. == References ==
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