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FEBS Lett. 1994 Jul 4;348(1):89-92.

Neuromedin B receptor, expressed in Xenopus laevis oocytes, selectively couples to G alpha q and not G alpha 11.

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Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, Israel.

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  • FEBS Lett 1994 Aug 1;349(2):318.


G-proteins of the q family have been implicated as mediators of bombesin receptors action. We cloned Xenopus G alpha q and G alpha 11 and specifically disrupted the synthesis of either protein with selective antisense oligonucleotides. G alpha q antisense inhibited responses mediated by neuromedin B receptor (NMB-R) by 74%, though not by gastrin-releasing peptide receptor (GRP-R). G alpha 11 antisense had little effect on either GRP-R- or NMB-R-mediated responses. This suggests that NMB-R couples to G alpha q, and that GRP-R and NMB-R show distinct G-protein coupling preferences in the Xenopus oocyte.

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