Abstract:Halophilic archaea are an important group in the domain archaea. They are of great value in the fields of genetics and metabolism, evolution and adaptation, technology frontier and synthetic biology. Haloarchaeal promoter is indispensable for both fundamental and applied research on halophilic archaea. In this paper, we first described the structure and functions of archaeal promoter in transcription. Then, we summarized and discussed the research achievements in haloarchaeal promoter from the following three aspects: the methods for studying promoter, the constitutive and inducible haloarchaeal promoters reported so far, and their applications. The challenges and future research focusing on mining, designing, developing, and optimizing haloarchaeal promoter were also prospected.