Fermentation Process for Preparing Coenzyme Q10 by the Recombinant Agrobacterium tumefaciens

The present invention relates to a transformed Agrobacterium tumefaciens BNQ-pGPRX11 (Accession No. KCCM-10554) harboring a recombinant expression vector (pGPRX11). Further, the present invention also provides a fermentation method for maximum production of coenzyme Q 10 using a transformed Agrobacterium tumefaciens deposited to Korean Culture Center of Microorganism with accession number KCCM-10554 comprising the steps of: i) constructing the recombinant expression vector pGPRX11 containing decaprenyl diphosphate synthase gene and 1-deoxy-D-xylulose 5-phosphate synthase gene (SEQ ID NO: 1); ii) preparing a transformed Agrobacterium tumefaciens (KCCM-10554) by harboring said recombinant expression vector pGPRX11 to the host of Agrobacterium tumefaciens BNQ 0605 (KCCM-10413); iii) growing the transformed cells on growth medium comprising 50 g/L of sucrose, 15 g/L of yeast extract, 15 g/L of peptone and 7.5 g/L of NaCl; iv) fermenting transformed cells on production medium comprising 30˜50 g/L of corn steep powder, 0.3˜0.7 g/L of KH 2 PO 4 , 0.3˜0.7 g/L of K 2 HPO 4 , 12˜18 g/L of ammonium sulfate, 1.5˜2.5 g/L of lactic acid, 0.2˜0.3 g/L of magnesium sulfate on condition that aeration rate of the medium is 0.8˜1.2 volume of air per volume of medium per minute, temperature is 30˜34°C. and pH is 6.0˜8.0; v) removing the transformed cells and other residue from the fermentation medium; and vi) separating and recovering coenzyme Q 10 from the fermentation medium of step (v).