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• W2783209342 abstract "The influence of cholesterol (CHOL) level on integrin sequestration in raft-mimicking lipid mixtures forming coexisting liquid-ordered (lo) and liquid-disordered (ld) lipid domains is investigated using complementary, single-molecule-sensitive, confocal detection methods. Systematic analysis of membrane protein distribution in such a model membrane environment demonstrates that variation of CHOL level has a profound influence on lo-ld sequestration of integrins, thereby exhibiting overall ld preference in the absence of ligands and lo affinity upon vitronectin addition. Accompanying photon-counting histogram analysis of integrins in the different model membrane mixtures shows that the observed changes of integrin sequestration in response to variations of membrane CHOL level are not associated with altering integrin oligomerization states. Instead, our experiments suggest that the strong CHOL dependence of integrin sequestration can be attributed to CHOL-mediated changes of lipid packing and bilayer thickness in coexisting lo and ld domains, highlighting the significance of a biophysical mechanism of CHOL-mediated regulation of integrin sequestration. We envision that this model membrane study may help clarify the influence of CHOL in integrin functionality in plasma membranes, thus providing further insight into the role of lipid heterogeneities in membrane protein distribution and function in a cellular membrane environment." @default.
• W2783209342 created "2018-01-26" @default.
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• W2783209342 date "2018-01-01" @default.
• W2783209342 modified "2023-10-12" @default.
• W2783209342 title "Changes in Cholesterol Level Alter Integrin Sequestration in Raft-Mimicking Lipid Mixtures" @default.
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• W2783209342 doi "https://doi.org/10.1016/j.bpj.2017.11.005" @default.
• W2783209342 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5773759" @default.
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