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Overexpression, Purification and Characterization of Recombinant Salmon Calcitonin, A Therapeutic Protein, in Streptomyces Avermitilis

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Calcitonin (CT) is a peptide hormone produced by the parafollicular cells of the thyroid gland in mammals and by the ultimobranchial gland of birds and fish. Salmon calcitonin (sCT), which is more potent and longer lasting than human CT, has been used widely for the treatment of osteoporosis, paget's disease, hypercalcemic shock and chronic pain in terminal cancer patients. sCT is one of the many bioactive peptides that require C-terminal amidation for full biological activity. In this study we describe the overexpression and over-production of C-terminal amidated sCT in recombinant Streptomyces avermitilis. With this approach the utilization of expensive peptide synthesis can be circumvented.

Keywords: Streptomyces avermitilis; amidating enzyme; plasmid ChiC9; salmon calcitonin

Document Type: Review Article


Affiliations: Biotechnology Department, Glenmark Laboratories, C-33 Nizamuddin East, New Delhi-110013, India.

Publication date: April 1, 2004

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.

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