Abstract: The source, structure and reaction mechanism of sucrose isomerase in recent years were introduced. The research progress of heterologous expression of sucrose isomerase by food safety strains in recent ten years was summarized. The research pointed out the shortcomings of sucrose isomerase and prospected the future research direction from two aspects: the transformation of the expression host strain and the transformation of the encoding gene of sucrose isomerase.

Key words: sucrose isomerase, food-safe bacteria, Saccharomyces cerevisiae, Yarrowia lipolytica, Bacillus subtilis