title: Fermentative production of shikimic acid: a paradigm shift of production concept from plant route to microbial route.
abstract: Different physiological and nutritional parameters affect the fermentative production of shikimic acid. In our study, Citrobacter freundii initially produced 0.62 g/L of shikimic acid in 72 h. However, when process optimization was employed, 5.11 g/L of shikimic acid was produced in the production medium consisting of glucose (5.0 %), asparagine (4.5 %), CaCO3 (2.0 %), at pH 6.0, when inoculated with 6 % inoculum and incubated at 30 ± 1 °C, 200 rpm for 60 h. Preliminary fed-batch studies have resulted in the production of 9.11 g/L of shikimic acid on feeding the production medium by 20 g/L of glucose at 24 h of the fermentation run. Production of similar amount of shikimic acid was observed when the optimized conditions were employed in a 10-L bioreactor as obtained in shake flask conditions. A total of 9.11 g/L of shikimic acid was produced in 60 h. This is approximately 14.69-fold increase in shikimic acid production when compared to the initial un-optimized production conditions. This has also resulted in the reduction of the production time. The present study provides useful information to the industrialists seeking environmentally benign technology for the production of bulk biomolecules through manipulation of various chemical parameters.
authors.affiliation: Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India.
authors.forename: Priyanka
authors.initials: P
authors.lastname: Tripathi
authors.forename: Garima
authors.initials: G
authors.lastname: Rawat
authors.forename: Sweta
authors.initials: S
authors.lastname: Yadav
authors.forename: R K
authors.initials: RK
authors.lastname: Saxena
mesh_terms: D019149:Bioreactors; D002851:Chromatography, High Pressure Liquid; D016971:Citrobacter freundii / Q000378:metabolism*; D003470:Culture Media; D005285:Fermentation; D010944:Plants / Q000378:metabolism*; D012765:Shikimic Acid / Q000378:metabolism*
chemical_list: D003470:Culture Media; D012765:Shikimic Acid