An artificial transport metabolon facilitates improved substrate utilization in yeast

作者：Thomik Thomas; Wittig Ilka; Choe Jun yong; Boles Eckhard; Oreb Mislav^*

来源：Nature Chemical Biology, 2017, 13(11): 1158-+.

DOI：10.1038/nchembio.2457

Efficient substrate utilization is the first and most important prerequisite for economically viable production of biofuels and chemicals by microbial cell factories. However, production rates and yields are often compromised by low transport rates of substrates across biological membranes and their diversion to competing pathways. This is especially true when common chassis organisms are engineered to utilize nonphysiological feedstocks. Here, we addressed this problem by constructing an artificial complex between an endogenous sugar transporter and a heterologous xylose isomerase in Saccharomyces cerevisiae. Direct feeding of the enzyme through the transporter resulted in acceleration of xylose consumption and substantially diminished production of xylitol as an undesired side product, with a concomitant increase in the production of ethanol. This underlying principle could also likely be implemented in other biotechnological applications.

• 出版日期2017-11