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Sulfakinin neuropeptides in a crustacean. Isolation, identification andtissue localization in the tiger prawn Penaeus
1Department of Clinical Biochemistry, Rigshospitalet, The National University Hospital, Copenhagen, Denmark.
Abstract:
The sulfakinin (SK) family of neuropeptides are characterized by a C-terminal octapeptide sequence that begins with two acidic residues (most commonly DD), and ends with YGHMRF-NH2, usually with the tyrosyl residue sulfated. So far, sulfakinins have only been identified in insects and the present study was initiated to investigate if the family is more widely distributed within the arthropods. Purification of an extract of the central nervous system of the giant tiger prawn Penaeus monodon has revealed three novel members of the sulfakinin peptide family. One of the peptides, Pem SKI, has the sequence
