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Crustacean hyperglycaemic hormone (CHH) is a neuropeptide that was originally identified in the X-organ/sinus gland complex of the eyestalks (ESs) in crustaceans. Several CHH isoforms and spliced variants were later identified in other tissues, and their functions have still not been completely unveiled. In this study, the identification and characterisation of the conventional CHH prepropeptide from the ESs of the littoral crab, Carcinus aestuarii, via rapid amplification of cDNA ends was reported. The identified CHH resulted in a coding sequence of 429 bp, an estimatedprotein of 142 aa with a signal peptide of 26 aa, followed by a CHH precursorrelated peptide of 40 aa and a mature peptide of 72 aa. |
