Abstract
Cephamycin C is an extracellular broad spectrum beta-lactam antibiotic produced by Streptomyces clavuligerus, S. cattleya and Nocardia lactamdurans. In the present study, different substrates for solid-state fermentation were screened for maximum cephamycin C production by S. clavuligerus NT4. The fermentation parameters such as substrate concentration, moisture content, potassium dihydrogen phosphate, inoculum size and ammonium oxalate were optimized by response surface methodology (RSM). The optimized conditions yielded 21.68 +/- 0.76 mg gds(-1) of cephamycin C as compared to 10.50 +/- 1.04 mg gds(-1) before optimization. Effect of various amino acids on cephamycin C production was further studied by using RSM, which resulted in increased yield of 27.41 +/- 0.65 mg gds(-1).
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