1
|
Amer-Sarsour F, Falik D, Berdichevsky Y, Kordonsky A, Eid S, Rabinski T, Ishtayeh H, Cohen-Adiv S, Braverman I, Blumen SC, Laviv T, Prag G, Vatine GD, Ashkenazi A. Disease-associated polyalanine expansion mutations impair UBA6-dependent ubiquitination. EMBO J 2024; 43:250-276. [PMID: 38177505 PMCID: PMC10897158 DOI: 10.1038/s44318-023-00018-9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 11/23/2023] [Accepted: 12/01/2023] [Indexed: 01/06/2024] Open
Abstract
Expansion mutations in polyalanine stretches are associated with a growing number of diseases sharing a high degree of genotypic and phenotypic commonality. These similarities prompted us to query the normal function of physiological polyalanine stretches and to investigate whether a common molecular mechanism is involved in these diseases. Here, we show that UBA6, an E1 ubiquitin-activating enzyme, recognizes a polyalanine stretch within its cognate E2 ubiquitin-conjugating enzyme USE1. Aberrations in this polyalanine stretch reduce ubiquitin transfer to USE1 and, subsequently, polyubiquitination and degradation of its target, the ubiquitin ligase E6AP. Furthermore, we identify competition for the UBA6-USE1 interaction by various proteins with polyalanine expansion mutations in the disease state. The deleterious interactions of expanded polyalanine tract proteins with UBA6 in mouse primary neurons alter the levels and ubiquitination-dependent degradation of E6AP, which in turn affects the levels of the synaptic protein Arc. These effects are also observed in induced pluripotent stem cell-derived autonomic neurons from patients with polyalanine expansion mutations, where UBA6 overexpression increases neuronal resilience to cell death. Our results suggest a shared mechanism for such mutations that may contribute to the congenital malformations seen in polyalanine tract diseases.
Collapse
Affiliation(s)
- Fatima Amer-Sarsour
- Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Daniel Falik
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
- The Regenerative Medicine and Stem Cell (RMSC) Research Center, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
- The Zelman Center for Neuroscience, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
| | - Yevgeny Berdichevsky
- Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Alina Kordonsky
- School of Neurobiology, Biochemistry and Biophysics, the George S. Wise Faculty of Life Sciences, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Sharbel Eid
- Department of Physiology and Pharmacology, Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Tatiana Rabinski
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
- The Regenerative Medicine and Stem Cell (RMSC) Research Center, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
| | - Hasan Ishtayeh
- Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Stav Cohen-Adiv
- Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Itzhak Braverman
- Department of Otolaryngology, Head and Neck Surgery, Hillel Yaffe Medical Center, Hadera, Israel
- Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Sergiu C Blumen
- Rappaport Faculty of Medicine, Technion, Haifa, Israel
- Department of Neurology, Hillel Yaffe Medical Center, Hadera, Israel
| | - Tal Laviv
- Department of Physiology and Pharmacology, Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel
- Sagol School of Neuroscience, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Gali Prag
- School of Neurobiology, Biochemistry and Biophysics, the George S. Wise Faculty of Life Sciences, Tel Aviv University, 6997801, Tel Aviv, Israel
- Sagol School of Neuroscience, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Gad D Vatine
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel.
- The Regenerative Medicine and Stem Cell (RMSC) Research Center, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel.
- The Zelman Center for Neuroscience, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel.
| | - Avraham Ashkenazi
- Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel.
- Sagol School of Neuroscience, Tel Aviv University, 6997801, Tel Aviv, Israel.
| |
Collapse
|
2
|
Ishtayeh H, Galves M, Barnatan TT, Berdichevsky Y, Amer‐Sarsour F, Pasmanik‐Chor M, Braverman I, Blumen SC, Ashkenazi A. Oculopharyngeal muscular dystrophy mutations link the RNA-binding protein HNRNPQ to autophagosome biogenesis. Aging Cell 2023; 22:e13949. [PMID: 37559347 PMCID: PMC10577562 DOI: 10.1111/acel.13949] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 06/22/2023] [Accepted: 07/15/2023] [Indexed: 08/11/2023] Open
Abstract
Autophagy is an intracellular degradative process with an important role in cellular homeostasis. Here, we show that the RNA binding protein (RBP), heterogeneous nuclear ribonucleoprotein Q (HNRNPQ)/SYNCRIP is required to stimulate early events in autophagosome biogenesis, in particular the induction of VPS34 kinase by ULK1-mediated beclin 1 phosphorylation. The RBPs HNRNPQ and poly(A) binding protein nuclear 1 (PABPN1) form a regulatory network that controls the turnover of distinct autophagy-related (ATG) proteins. We also show that oculopharyngeal muscular dystrophy (OPMD) mutations engender a switch from autophagosome stimulation to autophagosome inhibition by impairing PABPN1 and HNRNPQ control of the level of ULK1. The overexpression of HNRNPQ in OPMD patient-derived cells rescues the defective autophagy in these cells. Our data reveal a regulatory mechanism of autophagy induction that is compromised by PABPN1 disease mutations, and may thus further contribute to their deleterious effects.
Collapse
Affiliation(s)
- Hasan Ishtayeh
- The Department of Cell and Developmental Biology, Faculty of MedicineTel Aviv UniversityTel AvivIsrael
| | - Margarita Galves
- The Department of Cell and Developmental Biology, Faculty of MedicineTel Aviv UniversityTel AvivIsrael
| | - Tania T. Barnatan
- The Department of Cell and Developmental Biology, Faculty of MedicineTel Aviv UniversityTel AvivIsrael
| | - Yevgeny Berdichevsky
- The Department of Cell and Developmental Biology, Faculty of MedicineTel Aviv UniversityTel AvivIsrael
| | - Fatima Amer‐Sarsour
- The Department of Cell and Developmental Biology, Faculty of MedicineTel Aviv UniversityTel AvivIsrael
| | - Metsada Pasmanik‐Chor
- Bioinformatics Unit, G.S. Wise Faculty of Life ScienceTel Aviv UniversityTel AvivIsrael
| | - Itzhak Braverman
- Department of Otolaryngology, Head and Neck SurgeryHillel Yaffe Medical CenterHaderaIsrael
- Rappaport Faculty of Medicine, TechnionHaifaIsrael
| | - Sergiu C. Blumen
- Rappaport Faculty of Medicine, TechnionHaifaIsrael
- Department of NeurologyHillel Yaffe Medical CenterHaderaIsrael
| | - Avraham Ashkenazi
- The Department of Cell and Developmental Biology, Faculty of MedicineTel Aviv UniversityTel AvivIsrael
- Sagol School of NeuroscienceTel Aviv UniversityTel AvivIsrael
| |
Collapse
|
3
|
Achache H, Laurent L, Hecker-Mimoun Y, Ishtayeh H, Rappaport Y, Kroizer E, Colaiácovo MP, Tzur YB. Progression of Meiosis Is Coordinated by the Level and Location of MAPK Activation Via OGR-2 in Caenorhabditis elegans. Genetics 2019; 212:213-229. [PMID: 30867196 PMCID: PMC6499523 DOI: 10.1534/genetics.119.302080] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 12/07/2018] [Accepted: 03/07/2019] [Indexed: 02/07/2023] Open
Abstract
During meiosis, a series of evolutionarily conserved events allow for reductional chromosome division, which is required for sexual reproduction. Although individual meiotic processes have been extensively studied, we currently know far less about how meiosis is regulated and coordinated. In the Caenorhabditis elegans gonad, mitogen-activated protein kinase (MAPK) signaling drives oogenesis while undergoing spatial activation and deactivation waves. However, it is currently unclear how MAPK activation is governed and how it facilitates the progression of oogenesis. Here, we show that the oocyte and germline-related 2 (ogr-2) gene affects proper progression of oogenesis. Complete deletion of ogr-2 results in delayed meiotic entry and late spatial onset of double-strand break repair. Elevated levels of apoptosis are observed in this mutant, independent of the meiotic canonical checkpoints; however, they are dependent on the MAPK terminal member MPK-1/ERK. MPK-1 activation is elevated in diplotene in ogr-2 mutants and its aberrant spatial activation correlates with stages where meiotic progression defects are evident. Deletion of ogr-2 significantly reduces the expression of lip-1, a phosphatase reported to repress MPK-1, which is consistent with OGR-2 localization at chromatin in germ cells. We suggest that OGR-2 modulates the expression of lip-1 to promote the timely progression of meiosis through MPK-1 spatial deactivation.
Collapse
Affiliation(s)
- Hanna Achache
- Department of Genetics, Institute of Life Sciences, Hebrew University, Givat-Ram, Jerusalem 91904, Israel
| | - Lévana Laurent
- Department of Genetics, Institute of Life Sciences, Hebrew University, Givat-Ram, Jerusalem 91904, Israel
| | - Yaël Hecker-Mimoun
- Department of Genetics, Institute of Life Sciences, Hebrew University, Givat-Ram, Jerusalem 91904, Israel
| | - Hasan Ishtayeh
- Department of Genetics, Institute of Life Sciences, Hebrew University, Givat-Ram, Jerusalem 91904, Israel
| | - Yisrael Rappaport
- Department of Genetics, Institute of Life Sciences, Hebrew University, Givat-Ram, Jerusalem 91904, Israel
| | - Eitan Kroizer
- Department of Genetics, Institute of Life Sciences, Hebrew University, Givat-Ram, Jerusalem 91904, Israel
| | | | - Yonatan B Tzur
- Department of Genetics, Institute of Life Sciences, Hebrew University, Givat-Ram, Jerusalem 91904, Israel
| |
Collapse
|