1
|
Sen S, Thaker A, Sirajudeen L, Williams D, Nannenga BL. Protein-Nanoparticle Complex Structure Determination by Cryo-Electron Microscopy. ACS APPLIED BIO MATERIALS 2022; 5:4696-4700. [PMID: 35587230 DOI: 10.1021/acsabm.2c00130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Methods that allow the study of the structure of proteins in complex with nanomaterials promise to enhance our understanding of how biological molecules interface with inorganic materials. We used single-particle cryo-electron microscopy (cryo-EM) to demonstrate the potential for cryo-EM analysis to reveal structural details of protein-nanoparticle complexes. Two protein-nanomaterial complexes, namely, GroEL bound to platinum nanoparticles (GroEL-PtNP) and ferritin bound to an iron oxide nanoparticle, were used as model samples. For the GroEL-PtNP complex, a final reconstruction was obtained to 3.93 Å, which allowed us to fit the atomic model of GroEL into the resulting map. This sets the stage for future work and improvements on the use of cryo-EM for the study of protein-nanomaterial complexes.
Collapse
Affiliation(s)
- Sagnik Sen
- Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe 85287, Arizona, United States
- Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, 727 East Tyler Street, Tempe 85287, Arizona, United States
| | - Amar Thaker
- Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe 85287, Arizona, United States
- Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, 727 East Tyler Street, Tempe 85287, Arizona, United States
| | - Luqmanal Sirajudeen
- Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe 85287, Arizona, United States
- Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, 727 East Tyler Street, Tempe 85287, Arizona, United States
| | - Dewight Williams
- John M. Cowley Center for High Resolution Electron Microscopy, Arizona State University, Tempe 85281, Arizona, United States
| | - Brent L Nannenga
- Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe 85287, Arizona, United States
- Biodesign Center for Applied Structural Discovery, Biodesign Institute, Arizona State University, 727 East Tyler Street, Tempe 85287, Arizona, United States
| |
Collapse
|
2
|
Labra-Muñoz JA, de Reuver A, Koeleman F, Huber M, van der Zant HSJ. Ferritin-Based Single-Electron Devices. Biomolecules 2022; 12:biom12050705. [PMID: 35625632 PMCID: PMC9138424 DOI: 10.3390/biom12050705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/13/2022] [Accepted: 05/14/2022] [Indexed: 11/26/2022] Open
Abstract
We report on the fabrication of single-electron devices based on horse-spleen ferritin particles. At low temperatures the current vs. voltage characteristics are stable, enabling the acquisition of reproducible data that establishes the Coulomb blockade as the main transport mechanism through them. Excellent agreement between the experimental data and the Coulomb blockade theory is demonstrated. Single-electron charge transport in ferritin, thus, establishes a route for further characterization of their, e.g., magnetic, properties down to the single-particle level, with prospects for electronic and medical applications.
Collapse
Affiliation(s)
- Jacqueline A. Labra-Muñoz
- Department of Physics, Huygens-Kamerlingh Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2300 RA Leiden, The Netherlands;
- Kavli Institute of Nanoscience, Delft University of Technology, Orentzweg 1, 2628 CJ Delft, The Netherlands; (A.d.R.); (F.K.)
- Correspondence: (J.A.L.-M.); (H.S.J.v.d.Z.)
| | - Arie de Reuver
- Kavli Institute of Nanoscience, Delft University of Technology, Orentzweg 1, 2628 CJ Delft, The Netherlands; (A.d.R.); (F.K.)
| | - Friso Koeleman
- Kavli Institute of Nanoscience, Delft University of Technology, Orentzweg 1, 2628 CJ Delft, The Netherlands; (A.d.R.); (F.K.)
| | - Martina Huber
- Department of Physics, Huygens-Kamerlingh Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2300 RA Leiden, The Netherlands;
| | - Herre S. J. van der Zant
- Kavli Institute of Nanoscience, Delft University of Technology, Orentzweg 1, 2628 CJ Delft, The Netherlands; (A.d.R.); (F.K.)
- Correspondence: (J.A.L.-M.); (H.S.J.v.d.Z.)
| |
Collapse
|
3
|
Lead sulfide quantum dots inside ferritin: synthesis and application to photovoltaics. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0849-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
4
|
Olsen CR, Smith TJ, Embley JS, Maxfield JH, Hansen KR, Peterson JR, Henrichsen AM, Erickson SD, Buck DC, Colton JS, Watt RK. Permanganate-based synthesis of manganese oxide nanoparticles in ferritin. NANOTECHNOLOGY 2017; 28:195601. [PMID: 28332483 DOI: 10.1088/1361-6528/aa68ae] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This paper investigates the comproportionation reaction of MnII with [Formula: see text] as a route for manganese oxide nanoparticle synthesis in the protein ferritin. We report that [Formula: see text] serves as the electron acceptor and reacts with MnII in the presence of apoferritin to form manganese oxide cores inside the protein shell. Manganese loading into ferritin was studied under acidic, neutral, and basic conditions and the ratios of MnII and permanganate were varied at each pH. The manganese-containing ferritin samples were characterized by transmission electron microscopy, UV/Vis absorption, and by measuring the band gap energies for each sample. Manganese cores were deposited inside ferritin under both the acidic and basic conditions. All resulting manganese ferritin samples were found to be indirect band gap materials with band gap energies ranging from 1.01 to 1.34 eV. An increased UV/Vis absorption around 370 nm was observed for samples formed under acidic conditions, suggestive of MnO2 formation inside ferritin.
Collapse
Affiliation(s)
- Cameron R Olsen
- Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602, United States of America
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Olsen CR, Embley JS, Hansen KR, Henrichsen AM, Peterson JR, Colton JS, Watt RK. Tuning Ferritin's band gap through mixed metal oxide nanoparticle formation. NANOTECHNOLOGY 2017; 28:195604. [PMID: 28332485 DOI: 10.1088/1361-6528/aa68b0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study uses the formation of a mixed metal oxide inside ferritin to tune the band gap energy of the ferritin mineral. The mixed metal oxide is composed of both Co and Mn, and is formed by reacting aqueous Co2+ with [Formula: see text] in the presence of apoferritin. Altering the ratio between the two reactants allowed for controlled tuning of the band gap energies. All minerals formed were indirect band gap materials, with indirect band gap energies ranging from 0.52 to 1.30 eV. The direct transitions were also measured, with energy values ranging from 2.71 to 3.11 eV. Tuning the band gap energies of these samples changes the wavelengths absorbed by each mineral, increasing ferritin's potential in solar-energy harvesting. Additionally, the success of using [Formula: see text] in ferritin mineral formation opens the possibility for new mixed metal oxide cores inside ferritin.
Collapse
Affiliation(s)
- Cameron R Olsen
- Department of Physics and Astronomy, Brigham Young University, Provo UT 84602, United States of America
| | | | | | | | | | | | | |
Collapse
|