Ectatomin (IPR009458)

Short name: Ectatomin

Overlapping homologous superfamilies

Family relationships



Ectatomin is a toxin from the venom of the ant Ectatomma tuberculatum. Ectatomin can efficiently insert into the plasma membrane, where it can form channels. Ectatomin was shown to inhibit L-type calcium currents in isolated rat cardiac myocytes [PMID: 10336635]. In these cells, ectatomin induces a gradual, irreversible increase in ion leakage across the membrane, which can lead to cell death.

Ectatomin is comprised of two subunits, A and B, which are homologous. The structure of ectatomin reveals that each subunit consists of two alpha helices with a connecting hinge region, which form a hairpin structure that is stabilised by disulphide bridges. A disulphide bridge between the hinge regions of the two subunits links the heterodimer together, forming a closed bundle of four helices with a left-handed twist [PMID: 7881269].

GO terms

Biological Process

GO:0009405 pathogenesis

Molecular Function

GO:0005216 ion channel activity

Cellular Component

GO:0005576 extracellular region

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.