Advances in research on sulfide:quinone oxidoreductase

sulfide is a natural,widely distributed poisonous substance.Sulfide:quinone oxidoreductase(SQR) is a critical enzyme involving in organism sulfide metabolism.In this paper,we summarized recent progresses on SQR discovery and distribution,sequence characteristics,catalytic mechanism,three dimensional structure and its physiological function.Furthermore,we suggest some future research directions of SQR.