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NTA-Cholesterol Analogue for the Nongenetic Liquid-Ordered Phase-Specific Functionalization of Lipid Membranes with Proteins.

Yanjun ZhengTristan WegnerDaniele Di IorioMarco PierauFrank GloriusSeraphine Valeska Wegner
Published in: ACS chemical biology (2023)
The nongenetic modification of cell membranes with proteins is a straightforward way of cellular engineering. In these processes, it is important to specifically address the proteins to liquid-ordered (Lo) or liquid-disordered (Ld) domains as this can largely affect their biological functions. Herein, we report a cholesterol analogue (CHIM) with a nitrilotriacetic acid (NTA) headgroup, named CHIM-NTA. CHIM-NTA integrates into lipid membranes similar to the widely used phospholipid-derived DGS-NTA and, when loaded with Ni 2+ , allows for specific membrane immobilization of any polyhistidine-tagged proteins of choice. Yet, unlike DGS-NTA, it localizes to the Lo phase in phase-separated giant unilamellar vesicles (GUVs) and allows addressing His-tagged proteins to Lo domains. Furthermore, CHIM-NTA readily integrates into the membranes of live cells and thus enables the nongenetic modification of the cell surface with proteins. Overall, CHIM-NTA provides a facile and flexible way to modify biological membranes, in particular Lo domains, with His-tagged proteins and can serve as a broadly applicable molecular tool for cell surface engineering.
Keyphrases
  • cell surface
  • fatty acid
  • ionic liquid
  • drug delivery
  • cell death
  • bone marrow
  • cell proliferation
  • induced apoptosis
  • oxidative stress
  • endoplasmic reticulum stress
  • single molecule