Synthetic biology aims to design and build new biological systems with desirable properties,providing the foundation for the biosynthesis of secondary metabolites.The most prominent representation of synthetic biology has been used in microbial engineering by recombinant DNA technology.However,there are advantages of using a deleted host,and therefore an increasing number of biotechnology studies follow similar strategies to dissect cellular networks and construct genomereduced microbes.This review will give an overview of the strategies used for constructing and engineering reduced-genome factories by synthetic biology to improve production of secondary metabolites.
Extreme environments, primeval forest, sea sediments and plants in China yielded members of a new suborder, Jiangellineae, a new family Sinobacteraceae, and 23 new genera of actinomycetes and other bacteria. Three suggestions were made for further discoveries of new actinomycetes. First, natural habitats such as old growth forests, and extreme environments, should be given sampling priority; second, culturing procedures need to be constantly improved to mimic natural habitats; third, less than 98.5% similarity of 16S rRNA sequence to that of a known species could be used as an indicator of a new species.
