1
|
Kulanayake S, Dar F, Tikoo SK. Regions of Bovine Adenovirus-3 Protein VII Involved in Interactions with Viral and Cellular Proteins. Viruses 2024; 16:732. [PMID: 38793614 PMCID: PMC11125828 DOI: 10.3390/v16050732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/30/2024] [Accepted: 04/30/2024] [Indexed: 05/26/2024] Open
Abstract
The L 1 region of bovine adenovirus (BAdV)-3 encodes a multifunctional protein named protein VII. Anti-protein VII sera detected a protein of 26 kDa in transfected or BAdV-3-infected cells, which localizes to nucleus and nucleolus of infected/transfected cells. Analysis of mutant protein VII identified four redundant overlapping nuclear/nucleolar localization signals as deletion of all four potential nuclear/nucleolar localization signals localizes protein VII predominantly to the cytoplasm. The nuclear import of protein VII appears to use importin α (α-1), importin-β (β-1) and transportin-3 nuclear transport receptors. In addition, different nuclear transport receptors also require part of protein VII outside nuclear localization sequences for efficient interaction. Proteomic analysis of protein complexes purified from recombinant BAdV-3 expressing protein VII containing Strep Tag II identified potential viral and cellular proteins interacting with protein VII. Here, we confirm that protein VII interacts with IVa2 and protein VIII in BAdV-3-infected cells. Moreover, amino acids 91-101 and 126-137, parts of non-conserved region of protein VII, are required for interaction with IVa2 and protein VIII, respectively.
Collapse
Affiliation(s)
- Shermila Kulanayake
- Vaccinology & Immunotherapeutics Program, School of Public Health, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (S.K.); (F.D.)
- Vaccine and Infectious Disease Organization (VIDO), University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Faryal Dar
- Vaccinology & Immunotherapeutics Program, School of Public Health, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (S.K.); (F.D.)
- Vaccine and Infectious Disease Organization (VIDO), University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Suresh K. Tikoo
- Vaccinology & Immunotherapeutics Program, School of Public Health, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (S.K.); (F.D.)
- Vaccine and Infectious Disease Organization (VIDO), University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
- Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada
| |
Collapse
|
2
|
Song DA, Alber S, Doron-Mandel E, Schmid V, Albus CA, Leitner O, Hamawi H, Oses-Prieto JA, Dezorella N, Burlingame AL, Fainzilber M, Rishal I. A New Monoclonal Antibody Enables BAR Analysis of Subcellular Importin β1 Interactomes. Mol Cell Proteomics 2022; 21:100418. [PMID: 36180036 PMCID: PMC9630795 DOI: 10.1016/j.mcpro.2022.100418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 01/18/2023] Open
Abstract
Importin β1 (KPNB1) is a nucleocytoplasmic transport factor with critical roles in both cytoplasmic and nucleocytoplasmic transport, hence there is keen interest in the characterization of its subcellular interactomes. We found limited efficiency of BioID in the detection of importin complex cargos and therefore generated a highly specific and sensitive anti-KPNB1 monoclonal antibody to enable biotinylation by antibody recognition analysis of importin β1 interactomes. The monoclonal antibody recognizes an epitope comprising residues 301-320 of human KPBN1 and strikingly is highly specific for cytoplasmic KPNB1 in diverse applications, with little reaction with KPNB1 in the nucleus. Biotinylation by antibody recognition with this novel antibody revealed numerous new interactors of importin β1, expanding the KPNB1 interactome to cytoplasmic and signaling complexes that highlight potential new functions for the importins complex beyond nucleocytoplasmic transport. Data are available via ProteomeXchange with identifier PXD032728.
Collapse
Affiliation(s)
- Didi-Andreas Song
- Departments of Biomolecular Sciences and Molecular Neuroscience, Weizmann Institute of Science, Rehovot, Israel
| | - Stefanie Alber
- Departments of Biomolecular Sciences and Molecular Neuroscience, Weizmann Institute of Science, Rehovot, Israel
| | - Ella Doron-Mandel
- Departments of Biomolecular Sciences and Molecular Neuroscience, Weizmann Institute of Science, Rehovot, Israel
| | - Vera Schmid
- Departments of Biomolecular Sciences and Molecular Neuroscience, Weizmann Institute of Science, Rehovot, Israel
| | - Christin A. Albus
- Departments of Biomolecular Sciences and Molecular Neuroscience, Weizmann Institute of Science, Rehovot, Israel
| | - Orith Leitner
- Life Science Core Facilities, Faculty of Biochemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Hedva Hamawi
- Life Science Core Facilities, Faculty of Biochemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Juan A. Oses-Prieto
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California, USA
| | - Nili Dezorella
- Electron Microscopy Unit, Department of Chemical Research Support, Weizmann Institute of Science, Rehovot, Israel
| | - Alma L. Burlingame
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California, USA
| | - Mike Fainzilber
- Departments of Biomolecular Sciences and Molecular Neuroscience, Weizmann Institute of Science, Rehovot, Israel
| | - Ida Rishal
- Departments of Biomolecular Sciences and Molecular Neuroscience, Weizmann Institute of Science, Rehovot, Israel,For correspondence: Ida Rishal
| |
Collapse
|
3
|
Candia RF, Cohen LS, Morozova V, Corbo C, Alonso AD. Importin-Mediated Pathological Tau Nuclear Translocation Causes Disruption of the Nuclear Lamina, TDP-43 Mislocalization and Cell Death. Front Mol Neurosci 2022; 15:888420. [PMID: 35592115 PMCID: PMC9113199 DOI: 10.3389/fnmol.2022.888420] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 04/12/2022] [Indexed: 12/13/2022] Open
Abstract
Tau is a cytosolic protein that has also been observed in the nucleus, where it has multiple proposed functions that are regulated by phosphorylation. However, the mechanism underlying the nuclear import of tau is unclear, as is the contribution of nuclear tau to the pathology of tauopathies. We have previously generated a pathological form of tau, PH-tau (pseudophosphorylation mutants S199E, T212E, T231E, and S262E) that mimics AD pathological behavior in cells, Drosophila, and a mouse model. Here, we demonstrated that PH-tau translocates into the nucleus of transiently transfected HEK-293 cells, but wildtype tau does not. We identified a putative importin binding site in the tau sequence, and showed that disruption of this site prevents tau from entering the nucleus. We further showed that this nuclear translocation is prevented by inhibitors of both importin-α and importin-β. In addition, expression of PH-tau resulted in an enlarged population of dying cells, which is prevented by blocking its entry into the nucleus. PH-tau-expressing cells also exhibited disruption of the nuclear lamina and mislocalization of TDP-43 to the cytoplasm. We found that PH-tau does not bundle microtubules, and this effect is independent of nuclear translocation. These results demonstrate that tau translocates into the nucleus through the importin-α/β pathway, and that PH-tau exhibits toxicity after its nuclear translocation. We propose a model where hyperphosphorylated tau not only disrupts the microtubule network, but also translocates into the nucleus and interferes with cellular functions, such as nucleocytoplasmic transport, inducing mislocalization of proteins like TDP-43 and, ultimately, cell death.
Collapse
Affiliation(s)
- Robert F. Candia
- Department of Biology, Center for Developmental Neuroscience, College of Staten Island, The City University of New York, Staten Island, NY, United States,Biology Program, The Graduate Center, The City University of New York, New York, NY, United States
| | - Leah S. Cohen
- Department of Chemistry, College of Staten Island, The City University of New York, Staten Island, NY, United States
| | - Viktoriya Morozova
- Department of Biology, Center for Developmental Neuroscience, College of Staten Island, The City University of New York, Staten Island, NY, United States,Biology Program, The Graduate Center, The City University of New York, New York, NY, United States
| | - Christopher Corbo
- Department of Biological Sciences, Wagner College, Staten Island, NY, United States
| | - Alejandra D. Alonso
- Department of Biology, Center for Developmental Neuroscience, College of Staten Island, The City University of New York, Staten Island, NY, United States,Biology Program, The Graduate Center, The City University of New York, New York, NY, United States,*Correspondence: Alejandra D. Alonso,
| |
Collapse
|
4
|
Aldossary AM, Tawfik EA, Alomary MN, Alsudir SA, Alfahad AJ, Alshehri AA, Almughem FA, Mohammed RY, Alzaydi MM. Recent Advances in Mitochondrial Diseases: from Molecular Insights to Therapeutic Perspectives. Saudi Pharm J 2022; 30:1065-1078. [PMID: 36164575 PMCID: PMC9508646 DOI: 10.1016/j.jsps.2022.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/24/2022] [Indexed: 11/07/2022] Open
Abstract
Mitochondria are double-membraned cytoplasmic organelles that are responsible for the production of energy in eukaryotic cells. The process is completed through oxidative phosphorylation (OXPHOS) by the respiratory chain (RC) in mitochondria. Thousands of mitochondria may be present in each cell, depending on the function of that cell. Primary mitochondria disorder (PMD) is a clinically heterogeneous disease associated with germline mutations in mitochondrial DNA (mtDNA) and/or nuclear DNA (nDNA) genes, and impairs mitochondrial structure and function. Mitochondrial dysfunction can be detected in early childhood and may be severe, progressive and often multi-systemic, involving a wide range of organs. Understanding epigenetic factors and pathways mutations can help pave the way for developing an effective cure. However, the lack of information about the disease (including age of onset, symptoms, clinical phenotype, morbidity and mortality), the limits of current preclinical models and the wide range of phenotypic presentations hamper the development of effective medicines. Although new therapeutic approaches have been introduced with encouraging preclinical and clinical outcomes, there is no definitive cure for PMD. This review highlights recent advances, particularly in children, in terms of etiology, pathophysiology, clinical diagnosis, molecular pathways and epigenetic alterations. Current therapeutic approaches, future advances and proposed new therapeutic plans will also be discussed.
Collapse
|