FMRFamide and related peptides modulate the actions of 5-hydroxytryptamine and proctolin on the foregut of the locust, Schistocerca gregaria.
نویسندگان
چکیده
reconstituted from detergent extracts in an active form. The 7. Kish, P, E., Fischer-Bovenkerk. C. & Ueda. '1.. ( 1989) I'roc. ability to extract the transporters from their native membrane environment without loss of activity is an important initial step towards their characterization at the molecular level and their purification. Nut/. Acud. SC~. U.S.A. 86, 3877-388 1 8. Maycox, P. R., Deckwerth. T., Hell. J. W. & Jahn. R. ( 1988) J.
منابع مشابه
Studies on the mode of action of octopamine, 5-hydroxytryptamine and proctolin on a myogenic rhythm in the locust.
The modes of action of the modulatory compounds octopamine, 5-hydroxytryptamine (5-HT) and proctolin on the frequency of the myogenic rhythm of the extensor-tibiae muscle of the hindleg of the locust, Schistocerca americana gregaria, have been investigated. 5-HT and proctolin increase the frequency of the myogenic rhythm and the results of the present study suggest that they may mediate their e...
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Continuing our studies on proctolin (Arg-Tyr-Leu-Pro-Thr) we performed the synthesis and biological evaluation of 52 analogues substituted in position 2, 3, 4, and 5 of the peptide chain. The peptides were bioassayed for cardiotropic activity in vitro on Tenebrio molitor and myotropic activity on foregut of Schistocerca gregaria. Twenty analogues retained 20-80% of proctolin activity.
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To explain the role of the Thr5 residue of proctolin (Arg-Tyr-Leu-Pro-Thr) in the myotropic activity of this insect neuropeptide, we synthesized two groups of its analogues: 1) Arg-Tyr-Leu-Pro-X-OH with X = Val (1), D-Val (2), Ile (3), D-Ile (4), Ala (5), D-Ala (6), Asn (7), Gln (8), Ser (9), Pro (10), Phe (11), Asp (12), Glu (13), Arg (14), D-Arg (15), Lys (16) and Gly (17) and 2) Arg-Tyr-Leu-...
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The quantitative distribution of FMRFamide-like peptides in the nervous system and in their putative target sites in the locust Schistocerca gregaria is described using radioimmunoassay techniques. The nature of the immunoreactive material has been characterized by high-pressure liquid chromatography. At least six peaks of FMRFamide-like immunoreactivity can be separated in extracts of locust n...
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ورودعنوان ژورنال:
- Biochemical Society transactions
دوره 18 3 شماره
صفحات -
تاریخ انتشار 1990