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Moinpour M, Fracassi A, Brea RJ, Salvador-Castell M, Pandey S, Edwards MM, Seifert S, Joseph S, Sinha SK, Devaraj NK. Controlling Protein Enrichment in Lipid Sponge Phase Droplets using SNAP-tag Bioconjugation. Chembiochem 2021; 23:e202100624. [PMID: 34936727 DOI: 10.1002/cbic.202100624] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/21/2021] [Indexed: 11/11/2022]
Abstract
All cells use organized lipid compartments to facilitate specific biological functions. Membrane-bound organelles create defined spatial environments that favor unique chemical reactions while isolating incompatible biological processes. Despite the fundamental role of cellular organelles, there is a scarcity of methods for preparing functional artificial lipid-based compartments. Here, we demonstrate a robust bioconjugation system for sequestering proteins into zwitterionic lipid sponge phase droplets. Incorporation of benzylguanine (BG)-modified phospholipids that form stable covalent linkages with an O6-methylguanine DNA methyltransferase (SNAP-tag) fusion protein enables programmable control of protein capture. We show that this methodology can be used to anchor hydrophilic proteins at the lipid-aqueous interface, concentrating them within an accessible but protected chemical environment. SNAP-tag technology enables the integration of proteins that regulate complex biological functions in lipid sponge phase droplets, and should facilitate the development of advanced lipid-based artificial organelles.
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Affiliation(s)
- Mahta Moinpour
- UCSD: University of California San Diego, Chemistry and Biochemistry, UNITED STATES
| | - Alessandro Fracassi
- UCSD: University of California San Diego, Chemistry and Biochemistry, UNITED STATES
| | - Roberto J Brea
- University of A Coruna: Universidade da Coruna, Chemistry, SPAIN
| | | | - Sudip Pandey
- UCSD: University of California San Diego, Physics, UNITED STATES
| | - Madison M Edwards
- UCSD: University of California San Diego, Chemistry and Biochemistry, UNITED STATES
| | - Soenke Seifert
- Argonne National Laboratory, Xray science division, UNITED STATES
| | - Simpson Joseph
- UCSD: University of California San Diego, Chemistry and Biochemistry, UNITED STATES
| | - Sunil K Sinha
- UCSD: University of California San Diego, Physics, UNITED STATES
| | - Neal Krishna Devaraj
- University of California, San Diego, Chemistry and Biochemistry, 9500 Gilman Drive, Urey Hall 4120, 92093, La Jolla, UNITED STATES
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Meynaq MYK, Lindholm-Sethson B, Tesfalidet S. Interaction of anions with lipid cubic phase membranes, an electrochemical impedance study. J Colloid Interface Sci 2018; 528:263-270. [PMID: 29859451 DOI: 10.1016/j.jcis.2018.05.071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 05/18/2018] [Accepted: 05/21/2018] [Indexed: 11/30/2022]
Abstract
HYPOTHESIS Electrochemical impedance spectroscopy is useful to monitor anionic interactions with a Lipid Cubic Phase, as previously demonstrated for cationic interaction (Khani Meynaq et al., 2016). It was expected that the smaller hydrophilic anions, acetate and chloride, would interact differently than the large tryptophan anion with its hydrophobic tail. EXPERIMENT The impedance measurements enabled estimation of resistances and capacitances of a freestanding lipid cubic phase membrane at exposure to 4 and 40 mM solutions of NaCl, NaOAc and NaTrp. Small-angle X-ray scattering was used for cubic phase identification and to track structural changes within the cubic phase when exposed to the different electrolytes. FINDINGS The membrane resistance increases at exposure to the electrolytes in the order Cl- < OAc- < Trp-. The membrane resistance decreases with time at exposure to the hydrophilic anions and increases with time at Trp- exposure. The membrane capacitances were lower for NaTrp compared to NaCl and NaOAc at the corresponding concentrations which is consistent with the results from SAXRD. It is concluded that Trp- ions do not enter the aqueous channels of the cubic phase but are strongly adsorbed to the membrane/electrolyte interface leading to large alteration of the lipid phase structure and a high membrane resistance.
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Lin Z, Liu S, Mao W, Tian H, Wang N, Zhang N, Tian F, Han L, Feng X, Mai Y. Tunable Self-Assembly of Diblock Copolymers into Colloidal Particles with Triply Periodic Minimal Surfaces. Angew Chem Int Ed Engl 2017; 56:7135-7140. [PMID: 28523856 DOI: 10.1002/anie.201702591] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Revised: 04/02/2017] [Indexed: 11/08/2022]
Abstract
We herein report the tunable self-assembly of simple block copolymers, namely polystyrene-block-poly(ethylene oxide) (PS-b-PEO) diblock copolymers, into porous cubosomes with inverse Im3‾m or Pn3‾m mesophases of controlled unit cell parameters as well as hexasomes with an inverse hexagonal (p6mm) structure, which have been rarely observed in polymer self-assembly. A new morphological phase diagram was constructed for the solution self-assembly of PS-b-PEO based on the volume fraction of the PS block against the initial copolymer concentration. The formation mechanisms of the cubosomes and hexasomes have also been revealed. This study not only affords a simple system for the controllable preparation and fundamental studies of ordered bicontinuous structures, but also opens up a new avenue towards porous architectures with highly ordered pores.
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Affiliation(s)
- Zhixing Lin
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Shaohua Liu
- State Key Laboratory of Precision Spectroscopy, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Wenting Mao
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Hao Tian
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Nan Wang
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Ninghe Zhang
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Feng Tian
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai, 201204, China
| | - Lu Han
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Xinliang Feng
- Department of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstrasse 4, 01062, Dresden, Germany
| | - Yiyong Mai
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
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Lin Z, Liu S, Mao W, Tian H, Wang N, Zhang N, Tian F, Han L, Feng X, Mai Y. Tunable Self-Assembly of Diblock Copolymers into Colloidal Particles with Triply Periodic Minimal Surfaces. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702591] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zhixing Lin
- School of Chemistry and Chemical Engineering; Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 China
| | - Shaohua Liu
- State Key Laboratory of Precision Spectroscopy; East China Normal University; 500 Dongchuan Road Shanghai 200241 China
| | - Wenting Mao
- School of Chemistry and Chemical Engineering; Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 China
| | - Hao Tian
- School of Chemistry and Chemical Engineering; Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 China
| | - Nan Wang
- School of Chemistry and Chemical Engineering; Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 China
| | - Ninghe Zhang
- School of Chemistry and Chemical Engineering; Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 China
| | - Feng Tian
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Science; Shanghai 201204 China
| | - Lu Han
- School of Chemistry and Chemical Engineering; Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 China
| | - Xinliang Feng
- Department of Chemistry and Food Chemistry; Technische Universität Dresden; Mommsenstrasse 4 01062 Dresden Germany
| | - Yiyong Mai
- School of Chemistry and Chemical Engineering; Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 China
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