[Prokaryotic expression of Amuc_1100 protein and its effects on high-fat diet rats combined streptozotocin injection].

OBJECTIVE Establish the prokaryotic expression system of Amuc_1100 protein from Akkermansia muciniphila, and analyze the effects of this protein on the body weight, blood glucose, intestinal barrier function and Akkermansia muciniphila abundance in rats fed with high-fat diet combined streptozotocin(STZ)injection. METHODS PCR product of Amuc_1100 Gene(Gene ID: 34174504) was linked to the double enzyme-digested pET-26 b plasmid vector. The recombinant expression plasmid pET-26 b-Amuc_1100 then transformed into E. Coli BL21. The verified clones through sequence analysis were induced by the addition of IPTG. High-fat diet rats were interfered with the purified protein at high and low doses. The changes of body weight, blood glucose, intestinal barrier function and Akkermansia muciniphila abundance were analyzed. RESULTS The recombinant expression plasmid pET-26 b-Amuc_1100 was successfully constructed. The sequencing result showed 100% similarity to the Amuc_1100 gene in GenBank. The molecular weight of the protein obtained was 42 kDa. The intervention of Amuc_1100 protein can reduce the weight of rats fed with high-fat diet combined STZ injection to some extent, improve barrier function and increase the abundance of Akkermansia muciniphila in intestine. CONCLUSION The prokaryotic expression system of Amuc_1100 protein was successfully constructed, which has a certain regulatory effect on rats fed with high-fat diet combined STZ injection.