Figure 5From: Enhancing solubility of deoxyxylulose phosphate pathway enzymes for microbial isoprenoid productionAddition of chemicals for increasing solubility of ERG12 and production of mevalonate phosphate (MVAP). The use of high concentration of sorbitol was also found to increase solubility of ERG12, a critical enzyme in the mevalonate pathway (the other isoprenoid precursor production pathway), and production of MVAP (product of ERG12). A: Metabolites and enzymes related to the mevalonate (MVA) pathway; MVA: Mevalonate, MVAP: Mevalonate phosphate, MVAPP: Mevalonate diphosphate, IPP: Isopentenyl diphosphate, DMAPP: Dimethylallyl diphosphate; ERG12: mevalonate kinase, ERG8: mevalonate phosphate kinase, ERG19: mevalonate diphosphate decarboxylase; B: Effects of sorbitol addition on solubility of ERG12, S: soluble fraction, IS: insoluble fraction; C: Effects of sorbitol addition on production of MVAP; Since ERG8 and ERG19 were not present in E. coli and also not recombinantly expressed, MVAP accumulated in ERG12 expressing E. coli , directly indicating activity of ERG12. Presented data were average of triplicates and standard errors were drawn on the plot. Student’s t-test was used to calculate the p values in the statistical analysis.Back to article page