Purification and functional analysis of YhaTU system, a two component K+/H+ antiporter from Bacillus subtilis

点击翻译按钮获取中文摘要

Bacillus subtilis YhaTU system is a K+/H+ antiporter which consists from two components, the hydrophilic ancillary protein YhaT and the membrane-embedded YhaU. The YhaTU system is not only a unique cation proton antiporter but also an interesting enzyme in respect of the evolution of ion antiporter from ion channel. In In this study, purification of the YhaTU system and cloning the genes which have point mutations at the various points of the genes have been tried.To purify the YhaTU complex, StrepTagII and His6 tags were introduced at N-terminal or C-terminal of the proteins. Fifty six mutations were also introduced into the genes to test the function of each amino acid residues. Now the basis to analyze the detail function of YhaTU has been constructed.