Analysis of the oligomeric state of mycobacterial membrane protein large 3 and its interaction with SQ109 with native cell membrane nanoparticles system.

Analysis of the oligomeric state of mycobacterial membrane protein large 3 and its interaction with SQ109 with native cell membrane nanoparticles system.
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DOI:
10.1016/j.bbamem.2021.183793
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发表时间:
2022-02-01
期刊:
Biochimica et biophysica acta. Biomembranes
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其他
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分枝杆菌膜蛋白大分子3(Mmpl3)作为海藻糖单分枝杆菌酸酯脂质转运蛋白参与细胞壁的生物合成。Mmpl3的抑制可以抑制细胞生长并导致分枝杆菌死亡。SQ109是Mmpl3的疏水性抑制剂。我们已经设计了一种无去污剂的策略来表征SQ109/Mmpl3相互作用,使用天然细胞膜纳米颗粒(NCMN)系统,一种用于提取更好地保留天然脂质的膜蛋白的新方法。用电子显微镜证实Mmpl3 NCMN颗粒的均匀性。使用NCMN系统对Mmpl3显示的疏水蛋白-配体相互作用分析可以广泛地应用于其他膜蛋白
Mycobacterial membrane protein large 3 (Mmpl3) as a trehalose monomycolate lipid transporter contributes to cell wall biosynthesis. Inhibition of Mmpl3 can suppress cell growth and lead to mycobacterial death. SQ109 is a hydrophobic inhibitor of Mmpl3. We have devised a detergent-free strategy to characterize the SQ109/Mmpl3 interaction using the Native Cell Membrane Nanoparticles (NCMN) system, a new method for extracting membrane proteins that better retains native lipids. The homogeneity of the Mmpl3 NCMN particles was confirmed with electron microscopy. The hydrophobic protein-ligand interaction analysis shown for Mmpl3 using the NCMN system may broadly apply to other membrane proteins
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