The first decapeptide adipokinetic hormone (AKH) in Heteroptera: A novel AKH from a South African saucer bug, Laccocoris spurcus (Naucoridae, Laccocorinae)

0368644 - BC 2012 RIV US eng J - Journal Article
Marco, H. G. - Šimek, Petr - Gäde, G.
The first decapeptide adipokinetic hormone (AKH) in Heteroptera: A novel AKH from a South African saucer bug, Laccocoris spurcus (Naucoridae, Laccocorinae).
Peptides. Roč. 32, č. 3 (2011), s. 454-460. ISSN 0196-9781. E-ISSN 1873-5169
R&D Projects: GA ČR GA203/09/2014
Grant - others:National Research Foundation, Pretoria(ZA) FA2007021300002; National Research Foundation, Pretoria(ZA) IFR2008071500048
Institutional research plan: CEZ:AV0Z50070508
Keywords : Insects * Heteroptera * Laccocoris spurcus
Subject RIV: ED - Physiology
Impact factor: 2.434, year: 2011

A novel peptide of the adipokinetic hormone (AKH)/red pigment-concentrating hormone (RPCH) family has been elucidated by mass spectrometry from the corpora cardiaca of an African saucer bug species, Laccocoris spurcus. It is the first decapeptide member found in the species-rich taxon Heteroptera, has the primary sequence pGlu-Val-Asn-Phe-Ser-pro-Ser-Trp-Gly-Gly amide and is denoted as Lacsp-AKH. The first eight amino acids are identical to the octapeptide Anaim-AKH of the European saucer bug, Ilyocoris cimicoides. The synthetic peptide Lacsp-AKH elevates lipids upon injection into the hemolymph of L spurcus at a low dose of 3 pmol. Swimming activity in this saucer bug also causes a significant increase in the lipid concentration in the hemolymph. Thus, both results point to an apparent function of the endogenous new decapeptide Lacsp-AKH in L spurcus, namely, to regulate lipid mobilization.
Permanent Link: http://hdl.handle.net/11104/0202935