The cyclic AMP receptors coordinate aggregation of individual cells into a multicellular organism, and regulate the expression of a large number of developmentally-regulated genes[1][2][3]. The amino acid sequences of the receptors contain high proportions of hydrophobic residues grouped into 7 domains, in a manner reminiscent of the rhodopsins and other receptors believed to interact with G-proteins. However, while a similar 3D framework has been proposed to account for this, there is no significant sequence similarity between these families: the cAMP receptors thus bear their own unique '7TM' signature.
References
↑Devreotes PN, Kimmel AR, Johnson RL, Klein PS, Sun TJ, Saxe III CL (1988). "A chemoattractant receptor controls development in Dictyostelium discoideum". Science. 241 (4872): 1467–1472. PMID3047871.CS1 maint: Multiple names: authors list (link)
↑Ginsburg GT, Louis JM, Johnson R, Devreotes PN, Kimmel AR, Saxe III CL (1993). "CAR2, a prestalk cAMP receptor required for normal tip formation and late development of Dictyostelium discoideum". Genes Dev. 7 (2): 262–272. PMID8436297.CS1 maint: Multiple names: authors list (link)
↑Devreotes PN, Kimmel AR, Johnson RL, Gollop R, Saxe III CL (1993). "Identification and targeted gene disruption of cAR3, a cAMP receptor subtype expressed during multicellular stages of Dictyostelium development". Genes Dev. 7 (2): 273–282. PMID8382181.CS1 maint: Multiple names: authors list (link)
