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Peptides. 2015 Jun;68:43-9. doi: 10.1016/j.peptides.2015.01.008. Epub 2015 Feb 7.

A novel adipokinetic peptide from the corpus cardiacum of the primitive caeliferan pygmy grasshopper Tetrix subulata (Caelifera, Tetrigidae).

Author information

1
Department of Biological Sciences, University of Cape Town, Rondebosch ZA-7700, South Africa. Electronic address: gerd.gade@uct.ac.za.
2
Biology Centre, The Czech Academy of Sciences, CZ-37005 Ceske Budejovice, Czech Republic.
3
Department of Biological Sciences, University of Cape Town, Rondebosch ZA-7700, South Africa.

Abstract

The basal caeliferan family Tetrigidae is investigated to identify neuropeptides belonging to the adipokinetic hormone (AKH) family. The pygmy grasshopper Tetrix subulata contains in its corpus cardiacum two octapeptides as revealed by liquid chromatography coupled to electrospray ionization mass spectrometry. The less abundant peptide is the well-known Schgr-AKH-II (pELNFSTGW amide) which is suggested to be the ancestral AKH of Caelifera and Ensifera. The second peptide, Tetsu-AKH (pEFNFTPGW amide), is novel and quite unusual with its third aromatic residue at position 2. It is thought to be autapomorphic for Caelifera. Tetsu-AKH has hyperlipemic activity in T. subulata and in Schistocerca gregaria.

KEYWORDS:

Adipokinetic peptide; Energy mobilization; Insects; Mass spectrometry; Pygmy grasshoppers; Tetrigidae

PMID:
25661310
DOI:
10.1016/j.peptides.2015.01.008
[Indexed for MEDLINE]

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