The present invention relates to methods of producing sugar phosphates by enzymatic transphosphorylation, wherein the phosphoryl transfer from phosphate donor substrates to sugar substrates is catalyzed by an enzyme having alpha-glucose-1-phosphatase activity. Furthermore, the present invention relates to a biocatalyst having sucrose phosphorylase as well as alpha-glucose-1-phosphatase activity and its use. The production of an enzyme having alpha-glucose-1-phosphatase activity and its use in the transphosphorylation of sugar substrates is also presented herein.

A method for producing glucose and derivatives thereof by means of biotransformation with a recombinant yeast, which belongs to the technical field of synthetic biology. A construction method comprises any one of the following steps: i, knocking out metabolic pathway-related enzymes of glucose and derivatives thereof in a yeast strain; ii, enhancing or using an activity of synthetic pathway-related enzymes of glucose and derivatives thereof in the yeast strain; and iii, enhancing or using a capability of glucose and derivatives thereof in the yeast strain to enter and exit the yeast. Further provided are a recombinant yeast strain capable of producing glucose or derivatives thereof at a high yield and the use thereof in the conversion of a non-grain low-carbon carbon source. The low-carbon non-grain carbon source synthesized by means of using photoelectrocatalysis or traditional chemical industry is used as a substrate, and rapid preparation of food product raw materials glucose and derivatives thereof from the non-grain carbon source is realized by means of recombinant yeast cells.