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@ARTICLE{Blenau:888640,
author = {Blenau, Wolfgang and Wilms, Joana Alessandra and Balfanz,
Sabine and Baumann, Arnd},
title = {{A}m{O}ctα2{R}: {F}unctional {C}haracterization of a
{H}oneybee {O}ctopamine {R}eceptor {I}nhibiting {A}denylyl
{C}yclase {A}ctivity},
journal = {International journal of molecular sciences},
volume = {21},
number = {24},
issn = {1422-0067},
address = {Basel},
publisher = {Molecular Diversity Preservation International},
reportid = {FZJ-2020-05083},
pages = {9334 -},
year = {2020},
abstract = {The catecholamines norepinephrine and epinephrine are
important regulators of vertebrate physiology. Insects such
as honeybees do not synthesize these neuroactive substances.
Instead, they use the phenolamines tyramine and octopamine
for similar physiological functions. These biogenic amines
activate specific members of the large protein family of G
protein-coupled receptors (GPCRs). Based on molecular and
pharmacological data, insect octopamine receptors were
classified as either α- or β-adrenergic-like octopamine
receptors. Currently, one α- and four β-receptors have
been molecularly and pharmacologically characterized in the
honeybee. Recently, an α2-adrenergic-like octopamine
receptor was identified in Drosophila melanogaster
(DmOctα2R). This receptor is activated by octopamine and
other biogenic amines and causes a decrease in intracellular
cAMP ([cAMP]i). Here, we show that the orthologous receptor
of the honeybee (AmOctα2R), phylogenetically groups in a
clade closely related to human α2-adrenergic receptors.
When heterologously expressed in an eukaryotic cell line,
AmOctα2R causes a decrease in [cAMP]i. The receptor
displays a pronounced preference for octopamine over
tyramine. In contrast to DmOctα2R, the honeybee receptor is
not activated by serotonin. Its activity can be blocked
efficiently by 5-carboxamidotryptamine and phentolamine. The
functional characterization of AmOctα2R now adds a sixth
member to this subfamily of monoaminergic receptors in the
honeybee and is an important step towards understanding the
actions of octopamine in honeybee behavior and physiology},
cin = {IBI-1},
ddc = {540},
cid = {I:(DE-Juel1)IBI-1-20200312},
pnm = {552 - Engineering Cell Function (POF3-552)},
pid = {G:(DE-HGF)POF3-552},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:33302363},
UT = {WOS:000603500200001},
doi = {10.3390/ijms21249334},
url = {https://juser.fz-juelich.de/record/888640},
}