Estudo da estabilidade produtiva de compostos bioativos em linhagem mutante de Streptomyces clavuligerus

• Ano de defesa: 2014
• Autor(a) principal: Carbonaro, Thaline de Mattos [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Biotecnologia; Compostos bioativos; Antibioticos; Bioactive compounds
• Link de acesso: http://hdl.handle.net/11449/110836

Streptomyces clavuligerus produces important β-lactam compounds such as: holomycin (Hol), pirrotina an important member of the class of antibiotics; cephamycin C (CefC), used as raw material for the production of semi-synthetic broad-spectrum antibiotics, applied in the prevention of severe postoperative infections; lastly, clavulanic acid (AC) inhibitor, β-lactamases produced by bacteria resistant to penicillins. The high genetic instability of S. clavuligerus often results in chromosomal deletions of stretches of DNA that are mostly associated with the sporulation capacity and production of secondary metabolites. Mutators such undesirable states are usually exacerbated by boundary conditions, such as sudden changes in temperature and pH, the presence of certain compounds, among other factors, which may occur at any stage of handling/cultivation of the microorganism. On the other hand, certain adverse conditions promote growth during fermentation production of secondary metabolites. Thus, the present study aimed to improve the cultivation of S. clavuligerus, defining a means cropping pattern batch containing nutrients whose presence favored the production of a bioactive determined (CEFC, AC or Hol), both by wild type as well as the mutant strain. Still, compared to the production of Hol mutants using inoculum spores stored in cryotubes (-80 ° C) and fresh spore suspension.