Design of tandem genes cluster and expression vector for biosynthesis of soybean isoflavones

A tandem gene cluster CHS-CHI-IFS (rIFS) for secondary metabolites of plant isoflavones was constructed by using the chalcone synthase (CHS), chalcone isomerase (CHI), and isoflavone synthase (IFS) (GenBank accession numbers {"type":"entrez-nucleotide","attrs":{"text":"EU526827","term_id":"170783761","term_text":"EU526827"}}EU526827, {"type":"entrez-nucleotide","attrs":{"text":"EU526829","term_id":"170783765","term_text":"EU526829"}}EU526829, {"type":"entrez-nucleotide","attrs":{"text":"EU526830","term_id":"170783767","term_text":"EU526830"}}EU526830) in a single recombination event with the pET22b vector. The resulting expression vector pET-rIFS was heterogeneously expressed. The highlights of the vector include ease of handling, high efficiency and universal application among diverse plant species. To the best of our knowledge, this is the first attempt at developing a novel method of constructing tandem gene cluster for future research involving secondary metabolism of isoflavones and isoflavones engineering.Key words: Isoflavones biosynthesis, Novel method, Secondary metabolism, Tandem gene cluster