Abstract
Cellulomonas flavigena produces a battery of cellulase components that act concertedly to degrade cellulose. The addition of cAMP to repressed C. flavigena cultures released catabolic repression, while addition of cAMP to induced C. flavigena cultures led to a cellobiohydrolase hyperproduction. Exogenous cAMP showed positive regulation on cellobiohydrolase production in C. flavigena grown on sugar cane bagasse. A C. flavigena cellobiohydrolase gene was cloned (named celA), which coded for a 71- kDa enzyme. Upstream, a repressor celR1, identified as a 38 kDa protein, was monitored by use of polyclonal antibodies.
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Acknowledgments
This work was supported by grant 45678-Z from Consejo Nacional de Ciencia y Tecnología (Conacyt), Mexico. JAHH was supported by PhD fellowship from Conacyt. The authors thank M. Mercado-Morales for technical assistance.
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Communicated by Jorge Membrillo-Hernández.
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Herrera-Herrera, J.A., Pérez-Avalos, O., Salgado, L.M. et al. Cyclic AMP regulates the biosynthesis of cellobiohydrolase in Cellulomonas flavigena growing in sugar cane bagasse. Arch Microbiol 191, 745–750 (2009). https://doi.org/10.1007/s00203-009-0502-y
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DOI: https://doi.org/10.1007/s00203-009-0502-y