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Motov VV, Kot EF, Shabalkina AV, Goncharuk SA, Arseniev AS, Goncharuk MV, Mineev KS. Investigation of lipid/protein interactions in trifluoroethanol-water mixtures proposes the strategy for the refolding of helical transmembrane domains. JOURNAL OF BIOMOLECULAR NMR 2023; 77:15-24. [PMID: 36451032 DOI: 10.1007/s10858-022-00408-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 11/22/2022] [Indexed: 05/03/2023]
Abstract
Membrane proteins are one of the keystone objects in molecular biology, but their structural studies often require an extensive search for an appropriate membrane-like environment and an efficient refolding protocol for a recombinant protein. Isotropic bicelles are a convenient membrane mimetic used in structural studies of membrane proteins. Helical membrane domains are often transferred into bicelles from trifluoroethanol-water mixtures. However, the protocols for such a refolding are empirical and the process itself is still not understood in detail. In search of the optimal refolding approaches for helical membrane proteins, we studied here how membrane proteins, lipids, and detergents interact with each other at various trifluoroethanol-water ratios. Using high-resolution NMR spectroscopy and dynamic light scattering, we determined the key states of the listed compounds in the trifluoroethanol/water mixture, found the factors that could be critical for the efficiency of refolding, and proposed several most optimal protocols. These protocols were developed on the transmembrane domain of neurotrophin receptor TrkA and tested on two model helical membrane domains-transmembrane of Toll-like receptor TLR9 and voltage-sensing domain of a potassium channel KvAP.
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Affiliation(s)
- Vladislav V Motov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Ulitsa Miklukho-Maklaya, 16/10, Moscow, Russian Federation, 117997
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Erik F Kot
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Ulitsa Miklukho-Maklaya, 16/10, Moscow, Russian Federation, 117997.
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia.
| | - Alexandra V Shabalkina
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Ulitsa Miklukho-Maklaya, 16/10, Moscow, Russian Federation, 117997
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Sergey A Goncharuk
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Ulitsa Miklukho-Maklaya, 16/10, Moscow, Russian Federation, 117997
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Alexander S Arseniev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Ulitsa Miklukho-Maklaya, 16/10, Moscow, Russian Federation, 117997
| | - Marina V Goncharuk
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Ulitsa Miklukho-Maklaya, 16/10, Moscow, Russian Federation, 117997
| | - Konstantin S Mineev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, RAS, Ulitsa Miklukho-Maklaya, 16/10, Moscow, Russian Federation, 117997
- Moscow Institute of Physics and Technology, Dolgoprudny, Russia
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Gerasimov AS, Zeinalov OA, El’darov MA, Shul’ga AA. Biosynthesis of human β2-adrenergic receptor in methylotrophic yeast Pichia pastoris and its purification. Mol Biol 2012. [DOI: 10.1134/s0026893312020057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kang C, Vanoye CG, Welch RC, Van Horn WD, Sanders CR. Functional delivery of a membrane protein into oocyte membranes using bicelles. Biochemistry 2010; 49:653-5. [PMID: 20044833 DOI: 10.1021/bi902155t] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Voltage-gated potassium channel modulatory membrane protein KCNE3 was overexpressed and purified into both micelles and bicelles. Remarkably, microinjection of KCNE3 in bicelles into Xenopus oocytes resulted in functional co-assembly with the human KCNQ1 channel expressed therein. Microinjection of LMPC micelles containing KCNE3 did not result in channel modulation, indicating that bicelles sometimes succeed at delivering a membrane protein into a cellular membrane when classical micelles fail. Backbone NMR resonance assignments were completed for KCNE3 in both bicelles and LMPC, indicating that the secondary structure distribution in KCNE3's N-terminus and transmembrane domains exhibits only modest differences from that of KCNE1, even though these KCNE family members have very different effects on KCNQ1 channel function.
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Affiliation(s)
- Congbao Kang
- Department of Biochemistry, Center for Structural Biology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-8725, USA
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