Protein dispatched homolog 1 (DISP1)

Protein dispatched homolog 1 (DISP1) is a 12-transmembrane domain membrane transporter essential for the release of lipid-modified Hedgehog ligands, notably Sonic hedgehog (Shh), from producing cells. It belongs to the RND family, sharing structural topology with transporters such as PTCH1 and NPC1, but uniquely mediates the extracellular release of macromolecular protein substrates rather than small molecules[2][3]. DISP1’s transporter-like activity involves transmembrane domains forming a sterol-sensing domain that modulates cholesterol-dependent ligand release. Its activation requires Furin-mediated proteolytic cleavage at the extracellular domain, which enables DISP1 to bind and transport Hedgehog ligands. DISP1 function is indispensable for effective Hedgehog pathway signaling during embryonic patterning, and mutations or deficiencies result in major developmental abnormalities including holoprosencephaly and pulmonary hypoplasia[1][2][3][5]. DISP1 is mostly studied in developmental biology, with no current direct pharmacological targeting; however, its role makes it relevant for investigations into regenerative medicine, birth defects, and possibly oncology.

Other names

DISP1DISPAMGC13130DKFZP434I0428MGC16796HPE10dispatched Aprotein dispatched homolog 1dispatched RND transporter family member 1

Not currently exploited therapeutically; indirect modulation of Hedgehog signaling (e.g., through associated molecules such as SCUBE2 or by proteolytic activation via Furin)