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Experimental determination and computational interpretation of biophysical properties of lipid bilayers enriched by cholesteryl hemisuccinate

W. Kulig, P. Jurkiewicz, A. Olżyńska, J. Tynkkynen, M. Javanainen, M. Manna, T. Rog, M. Hof, I. Vattulainen, P. Jungwirth,

. 2015 ; 1848 (2) : 422-32. [pub] 20141025

Jazyk angličtina Země Nizozemsko

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc15031664

Cholesteryl hemisuccinate (CHS) is one of the cholesterol-mimicking detergents not observed in nature. It is, however, widely used in protein crystallography, in biochemical studies of proteins, and in pharmacology. Here, we performed an extensive experimental and theoretical study on the behavior of CHS in lipid membranes rich in unsaturated phospholipids. We found that the deprotonated form of CHS (that is the predominant form under physiological conditions) does not mimic cholesterol very well. The protonated form of CHS does better in this regard, but also its ability to mimic the physical effects of cholesterol on lipid membranes is limited. Overall, although ordering and condensing effects characteristic to cholesterol are present in systems containing any form of CHS, their strength is appreciably weaker compared to cholesterol. Based on the considerable amount of experimental and atomistic simulation data, we conclude that these differences originate from the fact that the ester group of CHS does not anchor it in an optimal position at the water-membrane interface. The implications of these findings for considerations of protein-cholesterol interactions are briefly discussed.

Citace poskytuje Crossref.org

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$a Kulig, Waldemar $u Department of Physics, Tampere University of Technology, P. O. Box 692, FI-33101 Tampere, Finland. Electronic address: waldemar.kulig@tut.fi.
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$a Experimental determination and computational interpretation of biophysical properties of lipid bilayers enriched by cholesteryl hemisuccinate / $c W. Kulig, P. Jurkiewicz, A. Olżyńska, J. Tynkkynen, M. Javanainen, M. Manna, T. Rog, M. Hof, I. Vattulainen, P. Jungwirth,
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$a Cholesteryl hemisuccinate (CHS) is one of the cholesterol-mimicking detergents not observed in nature. It is, however, widely used in protein crystallography, in biochemical studies of proteins, and in pharmacology. Here, we performed an extensive experimental and theoretical study on the behavior of CHS in lipid membranes rich in unsaturated phospholipids. We found that the deprotonated form of CHS (that is the predominant form under physiological conditions) does not mimic cholesterol very well. The protonated form of CHS does better in this regard, but also its ability to mimic the physical effects of cholesterol on lipid membranes is limited. Overall, although ordering and condensing effects characteristic to cholesterol are present in systems containing any form of CHS, their strength is appreciably weaker compared to cholesterol. Based on the considerable amount of experimental and atomistic simulation data, we conclude that these differences originate from the fact that the ester group of CHS does not anchor it in an optimal position at the water-membrane interface. The implications of these findings for considerations of protein-cholesterol interactions are briefly discussed.
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$a Jurkiewicz, Piotr $u J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v. v. i., Dolejskova 3, 18223 Prague 8, Czech Republic. Electronic address: piotr.jurkiewicz@jh-inst.cas.cz.
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$a Olżyńska, Agnieszka $u J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v. v. i., Dolejskova 3, 18223 Prague 8, Czech Republic.
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$a Tynkkynen, Joona $u Department of Physics, Tampere University of Technology, P. O. Box 692, FI-33101 Tampere, Finland.
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$a Javanainen, Matti $u Department of Physics, Tampere University of Technology, P. O. Box 692, FI-33101 Tampere, Finland.
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$a Manna, Moutusi $u Department of Physics, Tampere University of Technology, P. O. Box 692, FI-33101 Tampere, Finland.
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$a Rog, Tomasz $u Department of Physics, Tampere University of Technology, P. O. Box 692, FI-33101 Tampere, Finland.
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$a Hof, Martin $u J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v. v. i., Dolejskova 3, 18223 Prague 8, Czech Republic.
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$a Vattulainen, Ilpo $u Department of Physics, Tampere University of Technology, P. O. Box 692, FI-33101 Tampere, Finland; MEMPHYS-Center for Biomembrane Physics, University of Southern Denmark, Odense, Denmark.
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$a Jungwirth, Pavel $u Department of Physics, Tampere University of Technology, P. O. Box 692, FI-33101 Tampere, Finland; Institute of Organic Chemistry Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague 6, Czech Republic.
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