title: Occurrence of insect kinins in the flesh fly, stable fly and horn fly-mass spectrometric identification from single nerves and diuretic activity.
abstract: MALDI-TOF mass spectrometric analysis of single lateral abdominal nerves (LANs) demonstrate the presence of the insect kinin Musdo-K in the housefly Musca domestica, and identify heretofore unknown insect kinins in two other Dipteran species as Musdo-K in the stable fly Stomoxys calcitrans and horn fly Haematobia irritans. The insect kinin native to the flesh fly Neobellieria bullata is identified as Drome-K. Musdo-K and Drome-K are identical save for the conservative substitution of Ser for Thr in position 2. The sequences of the insect kinins are, therefore, remarkably conserved throughout Dipterans. The in vitro Malpighian tubule fluid secretion activity of Musdo-K in the stable fly is similar to that in the housefly, whereas that of Drome-K is 30-fold more potent in the flesh fly than in the fruit fly. Given the structural identities of the kinins and CRF-like diuretic hormones of these Dipteran species, the housefly can serve as a model insect for the study of diuretic peptides and their functions in the stable fly and horn fly, both livestock pests.
authors.affiliation: Areawide Pest Management Research, Southern Plains Agricultural Research Center, USDA, 2881 F/B Road, College Station, TX 77845, USA. nachman@tamu.edu
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Nachman
authors.forename: Geoffrey M
authors.initials: GM
authors.lastname: Coast
authors.forename: Shane E
authors.initials: SE
authors.lastname: Tichy
authors.forename: David H
authors.initials: DH
authors.lastname: Russell
authors.forename: J Allen
authors.initials: JA
authors.lastname: Miller
authors.forename: Reinhard
authors.initials: R
authors.lastname: Predel
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D004175:Diptera / Q000737:chemistry*; D004232:Diuretics / Q000494:pharmacology*; D007705:Kinins / Q000032:analysis* / Q000737:chemistry / Q000494:pharmacology; D008969:Molecular Sequence Data; D009420:Nervous System / Q000737:chemistry*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D004232:Diuretics; D007705:Kinins