Insulin receptors and mechanism of action of insulin and of insulin-like growth factors

De Meyts, P.

Bulletin et Memoires de l'Academie Royale de Medecine de Belgique 149(3-4) 181-190; Discussion: 190-194

1994


ISSN/ISBN: 0377-8231
PMID: 7841929
Document Number: 438745
A novel mechanism of activation of the insulin and IGF-I receptors by their respective ligands is proposed, whereby the bivalent ligand bridges the two receptor alpha subunits at opposite sites in a symmetrical receptor structure. The proposed mechanism accounts for the binding stoichiometry and the phenomenon of negative cooperativity. It may play an important role in the regulation of mitogenesis.

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