[Advances in the biosynthesis and application of bixin]

Since synthetic pigments are potentially harmful to human health, natural ones such as bixin, one of the carotenoids, are favored. As the second widely used natural pigment in the world, there is significant interest in the biosynthetic pathway of bixin which has not been fully elucidated. This review summarizes the chemical properties, extraction methods, biosynthetic pathway and application of bixin. In addition, we compared the difference between traditional extraction methods and new extraction techniques. Moreover, we described the genes involved in the biosynthetic pathway of bixin and the effects of abiotic stress on the biosynthesis of bixin, and discussed the application of bixin in food, pharmaceutical and chemical industries. However, the researches on bixin biosynthesis pathway are mostly carried out at the transcriptome level and most of the gene functions have not been elucidated. Therefore, we propose to characterize the entire bixin biosynthetic pathway using techniques of genomics, bioinformatics, and phytochemistry. This will help facilitate the synthetic biology research of bixin and development of bixin into new drugs.