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Issue 12, 2017
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Dendronic trimaltoside amphiphiles (DTMs) for membrane protein study

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The critical contribution of membrane proteins in normal cellular function makes their detailed structure and functional analysis essential. Detergents, amphipathic agents with the ability to maintain membrane proteins in a soluble state in aqueous solution, have key roles in membrane protein manipulation. Structural and functional stability is a prerequisite for biophysical characterization. However, many conventional detergents are limited in their ability to stabilize membrane proteins, making development of novel detergents for membrane protein manipulation an important research area. The architecture of a detergent hydrophobic group, that directly interacts with the hydrophobic segment of membrane proteins, is a key factor in dictating their efficacy for both membrane protein solubilization and stabilization. In the current study, we developed two sets of maltoside-based detergents with four alkyl chains by introducing dendronic hydrophobic groups connected to a trimaltoside head group, designated dendronic trimaltosides (DTMs). Representative DTMs conferred enhanced stabilization to multiple membrane proteins compared to the benchmark conventional detergent, DDM. One DTM (i.e., DTM-A6) clearly outperformed DDM in stabilizing human β2 adrenergic receptor (β2AR) and its complex with Gs protein. A further evaluation of this DTM led to a clear visualization of β2AR-Gs complex via electron microscopic analysis. Thus, the current study not only provides novel detergent tools useful for membrane protein study, but also suggests that the dendronic architecture has a role in governing detergent efficacy for membrane protein stabilization.

Graphical abstract: Dendronic trimaltoside amphiphiles (DTMs) for membrane protein study

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The article was received on 24 Aug 2017, accepted on 14 Oct 2017 and first published on 25 Oct 2017

Article type: Edge Article
DOI: 10.1039/C7SC03700G
Citation: Chem. Sci., 2017,8, 8315-8324
  • Open access: Creative Commons BY-NC license
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    Dendronic trimaltoside amphiphiles (DTMs) for membrane protein study

    A. Sadaf, Y. Du, C. Santillan, J. S. Mortensen, I. Molist, A. B. Seven, P. Hariharan, G. Skiniotis, C. J. Loland, B. K. Kobilka, L. Guan, B. Byrne and P. S. Chae, Chem. Sci., 2017, 8, 8315
    DOI: 10.1039/C7SC03700G

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