کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
680313 1459968 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Production of validamycin A from hemicellulose hydrolysate by Streptomyces hygroscopicus 5008
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Production of validamycin A from hemicellulose hydrolysate by Streptomyces hygroscopicus 5008
چکیده انگلیسی


• Corncob hydrolysate was used as a low-cost feedstock for antibiotic fermentation.
• Xylose in corncob hydrolysate had a major contribution to VAL-A biosynthesis.
• Higher VAL-A production from corncob hydrolysate was achieved by an engineered strain.

Validamycin A (VAL-A) is an important agricultural antibiotic produced by Streptomyces hygroscopicus 5008, which uses starch as carbon source occupying about 20% of total production cost. To reduce the medium cost, corncob hydrolysate – a hemicellulose hydrolysate was applied as a low-cost substrate to VAL-A fermentation. It was found that three major sugars in corncob hydrolysate including d-glucose, d-xylose and l-arabinose could all be utilized by S. hygroscopicus 5008 to produce VAL-A while d-xylose was the main contributor. A higher VAL-A production titer from d-xylose was achieved by using a genetically engineered strain TC03 derived from S. hygroscopicus 5008, which resulted in 1.27-fold improvement of VAL-A production from the medium containing 13% (v/v) corncob hydrolysate compared to that by its original strain. A medium cost analysis was done and compared with previous reports. This work indicates a great potential of the hemicellulose hydrolysate as substrate for antibiotic fermentation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 175, January 2015, Pages 160–166
نویسندگان
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