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Palumbo V, Tariq A, Borgal L, Metz J, Brancaccio M, Gatti M, Wakefield JG, Bonaccorsi S. Drosophila Morgana is an Hsp90-interacting protein with a direct role in microtubule polymerisation. J Cell Sci 2020; 133:jcs236786. [PMID: 31907206 PMCID: PMC6983718 DOI: 10.1242/jcs.236786] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 07/17/2019] [Accepted: 12/17/2019] [Indexed: 12/25/2022] Open
Abstract
Morgana (Mora, also known as CHORD in flies) and its mammalian homologue, called CHORDC1 or CHP1, is a highly conserved cysteine and histidine-rich domain (CHORD)-containing protein that has been proposed to function as an Hsp90 co-chaperone. Morgana deregulation promotes carcinogenesis in both mice and humans while, in Drosophila, loss of mora causes lethality and a complex mitotic phenotype that is rescued by a human morgana transgene. Here, we show that Drosophila Mora localises to mitotic spindles and co-purifies with the Hsp90-R2TP-TTT supercomplex and with additional well-known Hsp90 co-chaperones. Acute inhibition of Mora function in the early embryo results in a dramatic reduction in centrosomal microtubule stability, leading to small spindles nucleated from mitotic chromatin. Purified Mora binds to microtubules directly and promotes microtubule polymerisation in vitro, suggesting that Mora directly regulates spindle dynamics independently of its Hsp90 co-chaperone role.
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Affiliation(s)
- Valeria Palumbo
- Dipartimento di Biologia e Biotecnologie Sapienza, Università di Roma, 00185 Rome, Italy
- Biosciences/Living Systems Institute, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, UK
| | - Ammarah Tariq
- Biosciences/Living Systems Institute, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, UK
| | - Lori Borgal
- Biosciences/Living Systems Institute, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, UK
| | - Jeremy Metz
- Biosciences/Living Systems Institute, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, UK
| | - Mara Brancaccio
- Dipartimento di Genetica, Biologia e Biochimica, Università di Torino, 10126 Torino, Italy
| | - Maurizio Gatti
- Dipartimento di Biologia e Biotecnologie Sapienza, Università di Roma, 00185 Rome, Italy
- Istituto di Biologia e Patologia Molecolari del CNR, 00185 Rome, Italy
| | - James G Wakefield
- Biosciences/Living Systems Institute, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, UK
| | - Silvia Bonaccorsi
- Dipartimento di Biologia e Biotecnologie Sapienza, Università di Roma, 00185 Rome, Italy
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Franke M, Baeßler B, Vechtel J, Dafinger C, Höhne M, Borgal L, Göbel H, Koerber F, Maintz D, Benzing T, Schermer B, Persigehl T. Magnetic resonance T2 mapping and diffusion-weighted imaging for early detection of cystogenesis and response to therapy in a mouse model of polycystic kidney disease. Kidney Int 2017; 92:1544-1554. [DOI: 10.1016/j.kint.2017.05.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/03/2017] [Accepted: 05/25/2017] [Indexed: 12/19/2022]
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Borgal L, Rinschen MM, Dafinger C, Liebrecht VI, Abken H, Benzing T, Schermer B. Jade-1S phosphorylation induced by CK1α contributes to cell cycle progression. Cell Cycle 2016; 15:1034-45. [PMID: 26919559 PMCID: PMC4889251 DOI: 10.1080/15384101.2016.1152429] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 02/04/2016] [Indexed: 12/13/2022] Open
Abstract
The PHD zinc finger protein Jade-1S is a component of the HBO1 histone acetyltransferase complex and binds chromatin in a cell cycle-dependent manner. Jade-1S also acts as an E3 ubiquitin ligase for the canonical Wnt effector protein β-catenin and is influenced by CK1α-mediated phosphorylation. To further elucidate the functional impact of this phosphorylation, we used a stable, low-level expression system to express either wild-type or mutant Jade-1S lacking the N-terminal CK1α phosphorylation motif. Interactome analyses revealed that the Jade-1S mutant unable to be phosphorylated by CK1α has an increased binding affinity to proteins involved in chromatin remodelling, histone deacetylation, transcriptional repression, and ribosome biogenesis. Interestingly, cells expressing the mutant displayed an elongated cell shape and a delay in cell cycle progression. Finally, phosphoproteomic analyses allowed identification of a Jade-1S site phosphorylated in the presence of CK1α but closely resembling a PLK1 phosphorylation motif. Our data suggest that Jade-1S phosphorylation at an N-terminal CK1α motif creates a PLK1 phospho-binding domain. We propose CK1α phosphorylation of Jade 1S to serve as a molecular switch, turning off chromatin remodelling functions of Jade-1S and allowing timely cell cycle progression. As Jade-1S protein expression in the kidney is altered upon renal injury, this could contribute to understanding mechanisms underlying epithelial injury repair.
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Affiliation(s)
- Lori Borgal
- Department II of Internal Medicine; University of Cologne; Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC); University of Cologne; Cologne, Germany
| | - Markus M. Rinschen
- Department II of Internal Medicine; University of Cologne; Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC); University of Cologne; Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne; Cologne, Germany
| | - Claudia Dafinger
- Department II of Internal Medicine; University of Cologne; Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC); University of Cologne; Cologne, Germany
| | - Valérie I. Liebrecht
- Center for Molecular Medicine Cologne (CMMC); University of Cologne; Cologne, Germany
- Department I of Internal Medicine; University of Cologne; Cologne, Germany
| | - Hinrich Abken
- Center for Molecular Medicine Cologne (CMMC); University of Cologne; Cologne, Germany
- Department I of Internal Medicine; University of Cologne; Cologne, Germany
| | - Thomas Benzing
- Department II of Internal Medicine; University of Cologne; Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC); University of Cologne; Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne; Cologne, Germany
- Systems Biology of Ageing Cologne; University of Cologne; Cologne, Germany
| | - Bernhard Schermer
- Department II of Internal Medicine; University of Cologne; Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC); University of Cologne; Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne; Cologne, Germany
- Systems Biology of Ageing Cologne; University of Cologne; Cologne, Germany
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Borgal L, Rinschen MM, Dafinger C, Hoff S, Reinert MJ, Lamkemeyer T, Lienkamp SS, Benzing T, Schermer B. Casein kinase 1 α phosphorylates the Wnt regulator Jade-1 and modulates its activity. J Biol Chem 2014; 289:26344-26356. [PMID: 25100726 DOI: 10.1074/jbc.m114.562165] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Tight regulation of Wnt/β-catenin signaling is critical for vertebrate development and tissue maintenance, and deregulation can lead to a host of disease phenotypes, including developmental disorders and cancer. Proteins associated with primary cilia and centrosomes have been demonstrated to negatively regulate canonical Wnt signaling in interphase cells. The plant homeodomain zinc finger protein Jade-1 can act as an E3 ubiquitin ligase-targeting β-catenin for proteasomal degradation and concentrates at the centrosome and ciliary basal body in addition to the nucleus in interphase cells. We demonstrate that the destruction complex component casein kinase 1α (CK1α) phosphorylates Jade-1 at a conserved SLS motif and reduces the ability of Jade-1 to inhibit β-catenin signaling. Consistently, Jade-1 lacking the SLS motif is more effective than wild-type Jade-1 in reducing β-catenin-induced secondary axis formation in Xenopus laevis embryos in vivo. Interestingly, CK1α also phosphorylates β-catenin and the destruction complex component adenomatous polyposis coli at a similar SLS motif to the effect that β-catenin is targeted for degradation. The opposing effect of Jade-1 phosphorylation by CK1α suggests a novel example of the dual functions of CK1α activity to either oppose or promote canonical Wnt signaling in a context-dependent manner.
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Affiliation(s)
- Lori Borgal
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany
| | - Markus M Rinschen
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-associated Diseases (CECAD), and University of Cologne, 50931 Cologne, Germany
| | - Claudia Dafinger
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany
| | - Sylvia Hoff
- Renal Division, Department of Medicine, University of Freiburg Medical Center, 79106 Freiburg, Germany, and
| | - Matthäus J Reinert
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany
| | - Tobias Lamkemeyer
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-associated Diseases (CECAD), and University of Cologne, 50931 Cologne, Germany
| | - Soeren S Lienkamp
- Renal Division, Department of Medicine, University of Freiburg Medical Center, 79106 Freiburg, Germany, and; Center for Biological Signaling Studies (BIOSS), Albert Ludwigs University, 79108 Freiburg, Germany
| | - Thomas Benzing
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-associated Diseases (CECAD), and University of Cologne, 50931 Cologne, Germany; Systems Biology of Ageing Cologne, University of Cologne, 50931 Cologne, Germany
| | - Bernhard Schermer
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, 50931 Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-associated Diseases (CECAD), and University of Cologne, 50931 Cologne, Germany; Systems Biology of Ageing Cologne, University of Cologne, 50931 Cologne, Germany,.
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Frank V, Habbig S, Bartram MP, Eisenberger T, Veenstra-Knol HE, Decker C, Boorsma RA, Göbel H, Nürnberg G, Griessmann A, Franke M, Borgal L, Kohli P, Völker LA, Dötsch J, Nürnberg P, Benzing T, Bolz HJ, Johnson C, Gerkes EH, Schermer B, Bergmann C. Mutations in NEK8 link multiple organ dysplasia with altered Hippo signalling and increased c-MYC expression. Hum Mol Genet 2013; 22:2177-85. [DOI: 10.1093/hmg/ddt070] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Borgal L, Habbig S, Hatzold J, Liebau MC, Dafinger C, Sacarea I, Hammerschmidt M, Benzing T, Schermer B. The ciliary protein nephrocystin-4 translocates the canonical Wnt regulator Jade-1 to the nucleus to negatively regulate β-catenin signaling. J Biol Chem 2012; 287:25370-80. [PMID: 22654112 DOI: 10.1074/jbc.m112.385658] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Nephronophthisis (NPH) is an autosomal-recessive cystic kidney disease and represents the most common genetic cause for end-stage renal disease in children and adolescents. It can be caused by the mutation of genes encoding for the nephrocystin proteins (NPHPs). All NPHPs localize to primary cilia, classifying this disease as a "ciliopathy." The primary cilium is a critical regulator of several cell signaling pathways. Cystogenesis in the kidney is thought to involve overactivation of canonical Wnt signaling, which is negatively regulated by the primary cilium and several NPH proteins, although the mechanism remains unclear. Jade-1 has recently been identified as a novel ubiquitin ligase targeting the canonical Wnt downstream effector β-catenin for proteasomal degradation. Here, we identify Jade-1 as a novel component of the NPHP protein complex. Jade-1 colocalizes with NPHP1 at the transition zone of primary cilia and interacts with NPHP4. Furthermore, NPHP4 stabilizes protein levels of Jade-1 and promotes the translocation of Jade-1 to the nucleus. Finally, NPHP4 and Jade-1 additively inhibit canonical Wnt signaling, and this genetic interaction is conserved in zebrafish. The stabilization and nuclear translocation of Jade-1 by NPHP4 enhances the ability of Jade-1 to negatively regulate canonical Wnt signaling. Loss of this repressor function in nephronophthisis might be an important factor promoting Wnt activation and contributing to cyst formation.
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Affiliation(s)
- Lori Borgal
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, 50937 Cologne, Germany
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Borgal L, Hong M, Sadi D, Mendez I. Differential effects of glial cell line-derived neurotrophic factor on A9 and A10 dopamine neuron survival in vitro. Neuroscience 2007; 147:712-9. [PMID: 17583436 DOI: 10.1016/j.neuroscience.2007.03.057] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2006] [Revised: 03/08/2007] [Accepted: 03/30/2007] [Indexed: 10/23/2022]
Abstract
Glial cell-line derived neurotrophic factor (GDNF) enhances dopamine (DA) cell survival and fiber outgrowth, and may be beneficial in enhancing cell restorative strategies for Parkinson's disease (PD). However, GDNF may have different roles for transplanted DA cell sub-types. The present in vitro study investigated the effect of GDNF on the survival of rat DA cells displaying a phenotype consistent with either the substantia nigra [A9 cells immunopositive for tyrosine hydroxylase (TH) and G-protein-gated inwardly rectifying potassium channel subunit 2 (GIRK2)] or with the ventral tegmental area [A10 cells immunopositive for TH and calbindin]. It was found that a single exposure of GDNF enhanced the number of DA cells of an A9 phenotype, without affecting DA cells of an A10 phenotype. Conversely, repeated GDNF exposure did not alter the survival of A9 phenotypic cells, but doubled the percentage of A10 cells. It was concluded that GDNF administration may affect dopaminergic cells differently depending on time and degree of GDNF exposure. For cell transplantation in PD, long-term GDNF administration may result in detrimental effects for transplanted A9 TH+ cells as this may introduce competition with A10 TH+ cells for survival and fiber outgrowth into the host striatum. These results may have important implications for clinical neural transplantation in PD.
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Affiliation(s)
- L Borgal
- Cell Restoration Laboratory, Brain Repair Centre, Dalhousie University, Halifax, NS, Canada
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