Title: Functional comparison of two evolutionary conserved insect neurokinin-like receptors
Authors: Poels, Jeroen ×
Verlinden, Heleen
Fichna, Jakub
Van Loy, Tom
Franssens, Vanessa
Studzian, Kazimierz
Janecka, Anna
Nachman, Ronald J
Vanden Broeck, Jozef #
Issue Date: Jan-2007
Publisher: Elsevier science inc
Series Title: Peptides vol:28 issue:1 pages:103-108
Abstract: Tachykinins are multifunctional neuropeptides that have been identified in vertebrates as well as invertebrates. The C-terminal FXGXRa-motif constitutes the consensus active core region of invertebrate tachykinins. In Drosophila, two putative G protein-coupled tachykinin receptors have been cloned: DTKR and NKD. This study focuses on the functional characterization of DTKR, the Drosophila ortholog of the stable fly's tachykinin receptor (STKR). Tachykinins containing an alanine residue instead of the highly conserved glycine (FXAXRa) display partial agonism on STKR-mediated Ca2+-responses, but not on cAMP-responses. STKR therefore seems to differentiate between a number of tachykinins. Gly- and Ala-containing tachykinins are both encoded in the Drosophila tachykinin precursor, thus raising the question of whether DTKR can also distinguish between these two tachykinin types. DTKR was activated by all Drosophila tachykinins and inhibited by tachykinin antagonists. Ala-containing analogs did not produce the remarkable activation behavior previously observed with STKR, suggesting different mechanisms of discerning ligands and/or activating effector pathways for STKR and DTKR. (c) 2006 Elsevier Inc. All rights reserved.
ISSN: 0196-9781
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Animal Physiology and Neurobiology Section - miscellaneous
Laboratory for Functional Biology (-)
Research Group Molecular Developmental Physiology and Signal Transduction (-)
Laboratory of Behavioral and Developmental Genetics
× corresponding author
# (joint) last author

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