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Title: Incorporation of Membrane Proteins Into Bicontinuous Microemulsions Through Winsor‐III System‐Based Extraction

Abstract

Abstract The membrane proteins (MP) α‐synuclein (ASYN) and bacteriorhodopsin (BR) were readily incorporated into bicontinuous microemulsions (BμEs) formed by two microemulsion systems: water/heptane/Aerosol‐OT (AOT)/CK‐2,13 and water/dodecane/sodium dodecyl sulfate (SDS)/1‐pentanol. (CK‐2,13 is an alkyl ethoxylate possessing two alkyl tail groups of carbon chain length 2 and 13 and an average degree of ethoxylation of 5.6.) MP were encapsulated in BμEs through preparation of Winsor‐III systems at optimal salinity, with the anionic surfactants AOT and SDS providing the driving force for extraction. Dissolution of ASYN in BμEs greatly increased the former's α‐helicity, similar to ASYN's behavior in the presence of biomembranes, while BμE‐ and vesicle‐encapsulated BR possessed similar secondary structure. Small‐angle neutron scattering (SANS) results clearly demonstrated the direct interaction of MP with the surfactants, resulting in a decrease of surface area per volume for surfactant monolayers due to decreased surfactant efficiency. The SANS signal for ASYN was isolated through the use of neutron contrast matching for the surfactants through partial deuteration of water and oil, one of the first reports of contrast matching for BμEs in the literature. The SANS results of the contrast‐matched sample reflected similar aggregation for ASYN in BμEs as was reported previously for vesicles and SDS solution.more » This study demonstrates the potential use of BμEs as MP host systems for conducting biochemical reactions such as the conversion of sunlight into adenosine triphosphate by BR and studying the fundamental behavior of MP, such as the role of ASYN dysfunction in Parkinson's disease, as well as for isolation and purification of MP via Winsor‐III‐based extraction.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [3]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [3]
  1. Department of Biosystems Engineering and Soil Science University of Tennessee Knoxville TN 37996 USA
  2. Neutron Scattering Division Oak Ridge National Laboratory 1 Bethel Valley Road Oak Ridge TN 37831 USA, Pfizer, Purification Process Development Andover MA 01810 USA
  3. Neutron Scattering Division Oak Ridge National Laboratory 1 Bethel Valley Road Oak Ridge TN 37831 USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1786536
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Journal of Surfactants and Detergents
Additional Journal Information:
Journal Name: Journal of Surfactants and Detergents Journal Volume: 24 Journal Issue: 4; Journal ID: ISSN 1097-3958
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
United States
Language:
English

Citation Formats

Hayes, Douglas G., Anunciado, Divina B., Ye, Ran, Williams, Rachel N. D., O'Neill, Hugh M., Pingali, Sai Venkatesh, and Urban, Volker S. Incorporation of Membrane Proteins Into Bicontinuous Microemulsions Through Winsor‐III System‐Based Extraction. United States: N. p., 2021. Web. doi:10.1002/jsde.12500.
Hayes, Douglas G., Anunciado, Divina B., Ye, Ran, Williams, Rachel N. D., O'Neill, Hugh M., Pingali, Sai Venkatesh, & Urban, Volker S. Incorporation of Membrane Proteins Into Bicontinuous Microemulsions Through Winsor‐III System‐Based Extraction. United States. https://doi.org/10.1002/jsde.12500
Hayes, Douglas G., Anunciado, Divina B., Ye, Ran, Williams, Rachel N. D., O'Neill, Hugh M., Pingali, Sai Venkatesh, and Urban, Volker S. Sun . "Incorporation of Membrane Proteins Into Bicontinuous Microemulsions Through Winsor‐III System‐Based Extraction". United States. https://doi.org/10.1002/jsde.12500.
@article{osti_1786536,
title = {Incorporation of Membrane Proteins Into Bicontinuous Microemulsions Through Winsor‐III System‐Based Extraction},
author = {Hayes, Douglas G. and Anunciado, Divina B. and Ye, Ran and Williams, Rachel N. D. and O'Neill, Hugh M. and Pingali, Sai Venkatesh and Urban, Volker S.},
abstractNote = {Abstract The membrane proteins (MP) α‐synuclein (ASYN) and bacteriorhodopsin (BR) were readily incorporated into bicontinuous microemulsions (BμEs) formed by two microemulsion systems: water/heptane/Aerosol‐OT (AOT)/CK‐2,13 and water/dodecane/sodium dodecyl sulfate (SDS)/1‐pentanol. (CK‐2,13 is an alkyl ethoxylate possessing two alkyl tail groups of carbon chain length 2 and 13 and an average degree of ethoxylation of 5.6.) MP were encapsulated in BμEs through preparation of Winsor‐III systems at optimal salinity, with the anionic surfactants AOT and SDS providing the driving force for extraction. Dissolution of ASYN in BμEs greatly increased the former's α‐helicity, similar to ASYN's behavior in the presence of biomembranes, while BμE‐ and vesicle‐encapsulated BR possessed similar secondary structure. Small‐angle neutron scattering (SANS) results clearly demonstrated the direct interaction of MP with the surfactants, resulting in a decrease of surface area per volume for surfactant monolayers due to decreased surfactant efficiency. The SANS signal for ASYN was isolated through the use of neutron contrast matching for the surfactants through partial deuteration of water and oil, one of the first reports of contrast matching for BμEs in the literature. The SANS results of the contrast‐matched sample reflected similar aggregation for ASYN in BμEs as was reported previously for vesicles and SDS solution. This study demonstrates the potential use of BμEs as MP host systems for conducting biochemical reactions such as the conversion of sunlight into adenosine triphosphate by BR and studying the fundamental behavior of MP, such as the role of ASYN dysfunction in Parkinson's disease, as well as for isolation and purification of MP via Winsor‐III‐based extraction.},
doi = {10.1002/jsde.12500},
journal = {Journal of Surfactants and Detergents},
number = 4,
volume = 24,
place = {United States},
year = {Sun Mar 14 00:00:00 EST 2021},
month = {Sun Mar 14 00:00:00 EST 2021}
}

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