title: Isolation and molecular characterization of a hyperglycemic neuropeptide from the sinus gland of the terrestrial isopod Armadillidium vulgare (Crustacea).
abstract: The major peptide from the sinus gland of the terrestrial isopod Armadillidium vulgare (Crustacea) has been extracted and purified by reverse-phase HPLC. This neuropeptide exhibited a high hyperglycemic activity and was therefore named A. vulgare crustacean hyperglycemic hormone (Arv-CHH). Its average molecular mass measured by mass spectrometry was 8729.3 Da. Its complete amino acid sequence was determined by a combination of Edman degradation and mass spectrometry. The N-terminal amino acid was found to be unblocked, the C-terminal residue was found amidated and none of the other 72 residues was affected by any post-translational modification. Disulfide bond assignment was made unambiguously by mass spectrometry and Edman degradation was performed on peptides produced by enzymatic cleavage. Relationships with other, similar neuropeptides from decapod sinus glands are discussed.
authors.affiliation: Laboratoire de biologie animale URA 1452, Université de Poitiers, France.
authors.forename: G
authors.initials: G
authors.lastname: Martin
authors.forename: O
authors.initials: O
authors.lastname: Sorokine
authors.forename: A
authors.initials: A
authors.lastname: Van Dorsselaer
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D060829:Arthropod Proteins; D002851:Chromatography, High Pressure Liquid; D003445:Crustacea; D004220:Disulfides / Q000737:chemistry / Q000378:metabolism; D010450:Endopeptidases / Q000378:metabolism; D007447:Invertebrate Hormones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013058:Mass Spectrometry; D008666:Metalloendopeptidases; D008969:Molecular Sequence Data; D008970:Molecular Weight; D009419:Nerve Tissue Proteins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D010446:Peptide Fragments / Q000737:chemistry / Q000378:metabolism; D012697:Serine Endopeptidases / Q000378:metabolism; D014357:Trypsin / Q000378:metabolism
chemical_list: D060829:Arthropod Proteins; D004220:Disulfides; D007447:Invertebrate Hormones; D009419:Nerve Tissue Proteins; D010446:Peptide Fragments; C015947:hyperglycemic hormone, crustacean; D010450:Endopeptidases; D012697:Serine Endopeptidases; C028344:glutamyl endopeptidase; D014357:Trypsin; D008666:Metalloendopeptidases; C058921:endoproteinase Asp-N