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Corrales-Guerrero L, Díaz-Moreno I. Deciphering the role of Zn 2+ -binding histidines from TIA-1 on the assembly and dynamics of stress granules. Biofactors 2024. [PMID: 38193795 DOI: 10.1002/biof.2037] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 12/19/2023] [Indexed: 01/10/2024]
Abstract
T-cell intracellular antigen-1 (TIA-1) is a key RNA-binding protein that participates in translation regulation and RNA splicing. TIA-1 undergoes liquid-liquid phase separation as a fundamental mechanism that enables the condensation of RNA and proteins into membraneless organelles called stress granules (SGs). However, this dynamic behavior can lead to aberrant fibril formation, implicated in neurodegenerative disorders, and must be tightly regulated. In this study, we investigated the role in the cell of histidine residues His94 and His96, responsible for Zn2+ binding. Using fluorescence microscopy, we found that the specific binding site formed by these residues is critical for SG assembly. Furthermore, it also plays a role maintaining the dynamic behavior of SG-assembled TIA-1. Collectively, our findings confirm the physiological relevance of TIA-1 His94 and His96 in the Zn2+ -mediated regulatory mechanism for protection against fibril formation in SGs.
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Affiliation(s)
| | - Irene Díaz-Moreno
- Institute for Chemical Research, University of Seville-CSIC, Seville, Spain
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Sun Y, Zhang P, Zheng H, Dong L, Tan L, Song C, Qiu X, Liao Y, Meng C, Yu S, Ding C. Chicken RNA-binding protein T-cell internal antigen-1 contributes to stress granule formation in chicken cells and tissues. J Vet Sci 2018; 19:3-12. [PMID: 28693298 PMCID: PMC5799397 DOI: 10.4142/jvs.2018.19.1.3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 02/10/2017] [Accepted: 03/26/2017] [Indexed: 11/30/2022] Open
Abstract
T-cell internal antigen-1 (TIA-1) has roles in regulating alternative pre-mRNA splicing, mRNA translation, and stress granule (SG) formation in human cells. As an evolutionarily conserved response to environmental stress, SGs have been reported in various species. However, SG formation in chicken cells and the role of chicken TIA-1 (cTIA-1) in SG assembly has not been elucidated. In the present study, we cloned cTIA-1 and showed that it facilitates the assembly of canonical SGs in both human and chicken cells. Overexpression of the chicken prion-related domain (cPRD) of cTIA-1 that bore an N-terminal green fluorescent protein (GFP) tag (pntGFP-cPRD) or Flag tag (pFlag-cPRD) induced the production of typical SGs. However, C-terminal GFP-tagged cPRD induced notably large cytoplasmic granules that were devoid of endogenous G3BP1 and remained stable when exposed to cycloheximide, indicating that these were not typical SGs, and that the pntGFP tag influences cPRD localization. Finally, endogenous cTIA-1 was recruited to SGs in chicken cells and tissues under environmental stress. Taken together, our study provide evidence that cTIA-1 has a role in canonical SG formation in chicken cells and tissues. Our results also indicate that cPRD is necessary for SG aggregation.
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Affiliation(s)
- Yingjie Sun
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Pin Zhang
- College of Animal Science and Technology, Shandong Agricultural University, Taian 271018, China
| | - Hang Zheng
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Luna Dong
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Lei Tan
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Cuiping Song
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Xusheng Qiu
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Ying Liao
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Chunchun Meng
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Shengqing Yu
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China
| | - Chan Ding
- Department of Avian Infectious Diseases, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Science, Shanghai 200241, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China
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