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Wang D, Wang Y, Li H, Han Y, Hu P, Ma K, Sheves M, Jin Y. Photoactivated Bacteriorhodopsin/SiN x Nanopore-Based Biological Nanofluidic Generator with Single-Protein Sensitivity. ACS NANO 2022; 16:1589-1599. [PMID: 34989239 DOI: 10.1021/acsnano.1c10255] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nanofluidics is an emerging hot field that explores the unusual behaviors of ions/molecules transporting through nanoscale channels, which possesses a broad application prospect. However, in situ probing bioactivity of functional proteins on a single-molecule level by a nanofluidic device has not been reported, and it is still a big challenge in the field. Herein, we reported a biological nanofluidic device with a single-protein sensitivity, based on natural proton-pumping protein, bacteriorhodopsin (bR), and a single SiNx nanopore. Nanofluidic single-molecule probing of bR proton-pumping activity and its light response were achieved under applied voltage of 0 V, by biologically self-powered steady-state ionic current nanopore sensing. Green-light irradiation of the device led to the monitoring of a steady-state proton current of ∼3.51 pA/per bR trimer, corresponding to charge density of 815 μC/cm2 generated by each bR monomer, which far exceeded the previously reported value of 1.4 μC/cm2. This finding and method would promote the development of artificial biological and hybrid nanofluidic devices in biosensing and energy conversion applications.
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Affiliation(s)
- Dandan Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China
| | - Yong Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Haijuan Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Yanchao Han
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Ping Hu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Kongshuo Ma
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Mordechai Sheves
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Yongdong Jin
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
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Li R, Hu F, Bao Q, Bao S, Qiao Y, Yu S, Guo J, Li CM. Enhancement of photoelectric response of bacteriorhodopsin by multilayered WO3·H2O nanocrystals/PVAmembrane. Chem Commun (Camb) 2010; 46:689-91. [DOI: 10.1039/b923354g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ron I, Friedman N, Cahen D, Sheves M. Selective electroless deposition of metal clusters on solid-supported bacteriorhodopsin: applications to orientation labeling and electrical contacts. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2008; 4:2271-2278. [PMID: 19016493 DOI: 10.1002/smll.200800524] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Controlling the orientation of bacteriorhodopsin (bR) monolayers is an important step in studying and utilizing such membranes in a solid-state configuration in, for example, photoelectric applications. Macroscopic monolayers of bR have been fabricated in a variety of ways, but characterization of the distribution of the two possible orientations in which the membrane fragments can adsorb has not yet been addressed experimentally. Here, an approach is presented that labels only one of the membrane surfaces by electroless growth of metal nanoparticles on top of the solid-supported membranes. In this way, it is possible to observe which surface of the membranes is actually adsorbed to the substrate. How this technique serves to interface the membranes with a top metal contact for further electrical measurements is also demonstrated.
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Affiliation(s)
- Izhar Ron
- Department of Materials and Interfaces, Weizmann Institute of Science, P. O. Box 26, Rehovot 76100, Israel
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Jin Y, Girshevitz O, Friedman N, Ron I, Cahen D, Sheves M. Covalent attachment of bacteriorhodopsin monolayer to bromo-terminated solid supports: preparation, characterization, and protein stability. Chem Asian J 2008; 3:1146-55. [PMID: 18484563 DOI: 10.1002/asia.200700403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The interfacing of functional proteins with solid supports and the study of related protein-adsorption behavior are promising and important for potential device applications. In this study, we describe the preparation of bacteriorhodopsin (bR) monolayers on Br-terminated solid supports through covalent attachment. The bonding, by chemical reaction of the exposed free amine groups of bR with the pendant Br group of the chemically modified solid surface, was confirmed both by negative AFM results obtained when acetylated bR (instead of native bR) was used as a control and by weak bands observed at around 1610 cm(-1) in the FTIR spectrum. The coverage of the resultant bR monolayer was significantly increased by changing the pH of the purple-membrane suspension from 9.2 to 6.8. Although bR, which is an exceptionally stable protein, showed a pronounced loss of its photoactivity in these bR monolayers, it retained full photoactivity after covalent binding to Br-terminated alkyls in solution. Several characterization methods, including atomic force microscopy (AFM), contact potential difference (CPD) measurements, and UV/Vis and Fourier transform infrared (FTIR) spectroscopy, verified that these bR monolayers behaved significantly different from native bR. Current-voltage (I-V) measurements (and optical absorption spectroscopy) suggest that the retinal chromophore is probably still present in the protein, whereas the UV/Vis spectrum suggests that it lacks the characteristic covalent protonated Schiff base linkage. This finding sheds light on the unique interactions of biomolecules with solid surfaces and may be significant for the design of protein-containing device structures.
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Affiliation(s)
- Yongdong Jin
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel.
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Jin Y, Honig T, Ron I, Friedman N, Sheves M, Cahen D. Bacteriorhodopsin as an electronic conduction medium for biomolecular electronics. Chem Soc Rev 2008; 37:2422-32. [DOI: 10.1039/b806298f] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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