肠道共生菌Akkermansia muciniphila编码的重组蛋白Amuc_0119的表达与纯化
任志豪 , 左腾 , 张伟云 , 于大海 , 房学迅
高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (12) : 139 -145.
肠道共生菌Akkermansia muciniphila编码的重组蛋白Amuc_0119的表达与纯化
Expression and Purification of Recombinant Amuc_0119 Protein Encoded by the Gut Commensal Bacterium Akkermansia Muciniphila
粘蛋白降解肠道共生菌Akkermansia muciniphila因具有促进健康的效用而备受关注, 其蛋白组分在宿主-微生物互作中发挥着重要作用. 其中, Amuc_0119是一类尚未表征的假定蛋白, 具有潜在生物学功能. 本文旨在构建Amuc_0119的重组表达系统, 以促进其结构和功能研究. 将Amuc_0119编码序列克隆至N端和C端均带有6×His标签的pET-28a(+)载体中, 并转化至大肠杆菌BL21(DE3). 在37 ℃下以0.5 mmol/L IPTG过夜诱导表达, 经SDS-PAGE分析获得了46 kDa重组蛋白, 并通过Ni-NTA亲和层析纯化, 其纯度达92.08%. Western blot结果确认为目标蛋白, 通过BCA定量测得最终浓度为818.44 μg/mL. 本文建立了Akkermansia muciniphila来源Amuc_0119的高效表达与纯化体系, 为后续结构及功能研究提供了必要工具.
The mucin-degrading gut commensal bacterium Akkermansia muciniphila has emerged as a promising probiotic due to its significant health-promoting effects, wherein its protein constituents mediate critical host-microbe crosstalk. Notably, Amuc_0119 represents an uncharacterized protein potentially with beneficial biological functions. In this study, we aimed to construct an expression system for recombinant Amuc_0119 to facilitate its structural and functional characterization. The coding sequence of Amuc_0119 was cloned into pET-28a(+) vector with an N-terminal 6×His-tag and successfully transformed into E. coli BL21(DE3) competent cells. Protein expression was induced by 0.5 mmol/L IPTG overnight at 37 °C. SDS-PAGE analysis revealed successful expression of the 46 kDa recombinant protein, which was subsequently purified via Ni-NTA affinity chromatography with a purity of 92.08%. Western blot with anti-His antibodies confirmed the target protein identity, while quantitative BCA assay determined a final concentration of 818.44 μg/mL. This study establishes the first efficient expression and purification protocol for Akkermansia muciniphila-derived Amuc_0119, providing essential tools for forthcoming structural studies and functional investigations for this bacterial protein.
粘蛋白降解肠道共生菌(Akkermansia muciniphila) / 益生菌 / Amuc_0119 / 表达 / 纯化
Akkermansia muciniphila / Probiotic / Amuc_0119 / Expression / Purification
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吉林省科技发展计划项目(20240401055YY)
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