1
|
Jernigan RJ, Logeswaran D, Doppler D, Nagaratnam N, Sonker M, Yang JH, Ketawala G, Martin-Garcia JM, Shelby ML, Grant TD, Mariani V, Tolstikova A, Sheikh MZ, Yung MC, Coleman MA, Zaare S, Kaschner EK, Rabbani MT, Nazari R, Zacks MA, Hayes B, Sierra RG, Hunter MS, Lisova S, Batyuk A, Kupitz C, Boutet S, Hansen DT, Kirian RA, Schmidt M, Fromme R, Frank M, Ros A, Chen JJL, Botha S, Fromme P. Room-temperature structural studies of SARS-CoV-2 protein NendoU with an X-ray free-electron laser. Structure 2023; 31:138-151.e5. [PMID: 36630960 PMCID: PMC9830665 DOI: 10.1016/j.str.2022.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 10/08/2022] [Accepted: 12/14/2022] [Indexed: 01/11/2023]
Abstract
NendoU from SARS-CoV-2 is responsible for the virus's ability to evade the innate immune system by cleaving the polyuridine leader sequence of antisense viral RNA. Here we report the room-temperature structure of NendoU, solved by serial femtosecond crystallography at an X-ray free-electron laser to 2.6 Å resolution. The room-temperature structure provides insight into the flexibility, dynamics, and other intrinsic properties of NendoU, with indications that the enzyme functions as an allosteric switch. Functional studies examining cleavage specificity in solution and in crystals support the uridine-purine cleavage preference, and we demonstrate that enzyme activity is fully maintained in crystal form. Optimizing the purification of NendoU and identifying suitable crystallization conditions set the benchmark for future time-resolved serial femtosecond crystallography studies. This could advance the design of antivirals with higher efficacy in treating coronaviral infections, since drugs that block allosteric conformational changes are less prone to drug resistance.
Collapse
Affiliation(s)
- Rebecca J Jernigan
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Dhenugen Logeswaran
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Diandra Doppler
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Nirupa Nagaratnam
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA
| | - Mukul Sonker
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Jay-How Yang
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA
| | - Gihan Ketawala
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Jose M Martin-Garcia
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA
| | - Megan L Shelby
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA
| | - Thomas D Grant
- Department of Structural Biology, Jacobs School of Medicine and Biomedical Sciences, SUNY University at Buffalo, 955 Main Street, Buffalo, NY 14203, USA
| | - Valerio Mariani
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | | | - Michelle Z Sheikh
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA
| | - Mimi Cho Yung
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA
| | - Matthew A Coleman
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA
| | - Sahba Zaare
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; Fulton School of Electrical, Computer, and Energy Engineering, Arizona State University, Tempe, AZ 85287, USA; Department of Physics, Arizona State University, Tempe, AZ 85287-1504, USA
| | - Emily K Kaschner
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Mohammad Towshif Rabbani
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA
| | - Reza Nazari
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA
| | - Michele A Zacks
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA
| | - Brandon Hayes
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Raymond G Sierra
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Mark S Hunter
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Stella Lisova
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Alexander Batyuk
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Christopher Kupitz
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Sebastien Boutet
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Debra T Hansen
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA
| | - Richard A Kirian
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; Department of Physics, Arizona State University, Tempe, AZ 85287-1504, USA
| | - Marius Schmidt
- Department of Physics, University of Wisconsin-Milwaukee, 3135 N. Maryland Avenue, Milwaukee, WI 53211, USA
| | - Raimund Fromme
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Matthias Frank
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA
| | - Alexandra Ros
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Julian J-L Chen
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Sabine Botha
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; Department of Physics, Arizona State University, Tempe, AZ 85287-1504, USA.
| | - Petra Fromme
- Biodesign Center for Applied Structural Discovery, Arizona State University, Tempe, AZ 85287-5001, USA; School of Molecular Sciences, Arizona State University, Tempe, AZ 85287-1604, USA.
| |
Collapse
|
2
|
Ortiz R, Koh D, Kim DH, Rabbani MT, Anguaya Velasquez C, Sonker M, Arriaga EA, Ros A. Continuous organelle separation in an insulator-based dielectrophoretic device. Electrophoresis 2022; 43:1283-1296. [PMID: 34964147 PMCID: PMC10905415 DOI: 10.1002/elps.202100326] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/30/2021] [Accepted: 12/13/2021] [Indexed: 11/06/2022]
Abstract
Heterogeneity in organelle size has been associated with devastating human maladies such as neurodegenerative diseases or cancer. Therefore, assessing the size-based subpopulation of organelles is imperative to understand the biomolecular foundations of these diseases. Here, we demonstrated a ratchet migration mechanism using insulator-based dielectrophoresis in conjunction with a continuous flow component that allows the size-based separation of submicrometer particles. The ratchet mechanism was realized in a microfluidic device exhibiting an array of insulating posts, tailoring electrokinetic and dielectrophoretic transport. A numerical model was developed to elucidate the particle migration and the size-based separation in various conditions. Experimentally, the size-based separation of a mixture of polystyrene beads (0.28 and 0.87 μ $\umu $ m) was accomplished demonstrating good agreement with the numerical model. Furthermore, the size-based separation of mitochondria was investigated using a mitochondria mixture isolated from HepG2 cells and HepG2 cells carrying the gene Mfn-1 knocked out, indicating distinct size-related migration behavior. With the presented continuous flow separation device, larger amounts of fractionated organelles can be collected in the future allowing access to the biomolecular signature of mitochondria subpopulations differing in size.
Collapse
Affiliation(s)
- Ricardo Ortiz
- School of Molecular Sciences, Arizona State University, Tempe, AZ, USA
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Domin Koh
- School of Molecular Sciences, Arizona State University, Tempe, AZ, USA
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Dai Hyun Kim
- School of Molecular Sciences, Arizona State University, Tempe, AZ, USA
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Mohammad Towshif Rabbani
- School of Molecular Sciences, Arizona State University, Tempe, AZ, USA
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Cesar Anguaya Velasquez
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Mukul Sonker
- School of Molecular Sciences, Arizona State University, Tempe, AZ, USA
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Edgar A Arriaga
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA
- Department of Chemistry, University of Minnesota, Minneapolis, MN, USA
| | - Alexandra Ros
- School of Molecular Sciences, Arizona State University, Tempe, AZ, USA
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| |
Collapse
|
4
|
Rabbani MT, Sonker M, Ros A. Carbon nanotube dielectrophoresis: Theory and applications. Electrophoresis 2020; 41:1893-1914. [PMID: 32474942 DOI: 10.1002/elps.202000049] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 05/07/2020] [Accepted: 05/18/2020] [Indexed: 01/31/2023]
Abstract
Carbon nanotubes (CNTs) are one of the most extensively studied nanomaterials in the 21st century. Since their discovery in 1991, many studies have been reported advancing our knowledge in terms of their structure, properties, synthesis, and applications. CNTs exhibit unique electrothermal and conductive properties which, combined with their mechanical strength, have led to tremendous attention of CNTs as a nanoscale material in the past two decades. To introduce the various types of CNTs, we first provide basic information on their structure followed by some intriguing properties and a brief overview of synthesis methods. Although impressive advances have been demonstrated with CNTs, critical applications require purification, positioning, and separation to yield desired properties and functional elements. Here, we review a versatile technique to manipulate CNTs based on their dielectric properties, namely dielectrophoresis (DEP). A detailed discussion on the DEP aspects of CNTs including the theory and various technical microfluidic realizations is provided. Various advancements in DEP-based manipulations of single-walled and multiwalled CNTs are also discussed with special emphasis on applications involving separation, purification, sensing, and nanofabrication.
Collapse
Affiliation(s)
- Mohammad Towshif Rabbani
- School of Molecular Sciences, Arizona State University, Tempe, AZ, USA.,Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Mukul Sonker
- School of Molecular Sciences, Arizona State University, Tempe, AZ, USA.,Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Alexandra Ros
- School of Molecular Sciences, Arizona State University, Tempe, AZ, USA.,Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| |
Collapse
|