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Shukla D, Gural BM, Cauley ES, Battula N, Mowla S, Karas BF, Roberts LE, Cavallo L, Turkalj L, Moody SA, Swan LE, Manzini MC. Duplicated zebrafish (Danio rerio) inositol phosphatases inpp5ka and inpp5kb diverged in expression pattern and function. Dev Genes Evol 2023; 233:25-34. [PMID: 37184573 PMCID: PMC10239392 DOI: 10.1007/s00427-023-00703-z] [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: 08/31/2022] [Accepted: 04/27/2023] [Indexed: 05/16/2023]
Abstract
One hurdle in the development of zebrafish models of human disease is the presence of multiple zebrafish orthologs resulting from whole genome duplication in teleosts. Mutations in inositol polyphosphate 5-phosphatase K (INPP5K) lead to a syndrome characterized by variable presentation of intellectual disability, brain abnormalities, cataracts, muscle disease, and short stature. INPP5K is a phosphatase acting at position 5 of phosphoinositides to control their homeostasis and is involved in insulin signaling, cytoskeletal regulation, and protein trafficking. Previously, our group and others have replicated the human phenotypes in zebrafish knockdown models by targeting both INPP5K orthologs inpp5ka and inpp5kb. Here, we show that inpp5ka is the more closely related orthologue to human INPP5K. While both inpp5ka and inpp5kb mRNA expression levels follow a similar trend in the developing head, eyes, and tail, inpp5ka is much more abundantly expressed in these tissues than inpp5kb. In situ hybridization revealed a similar trend, also showing unique localization of inpp5kb in the pineal gland and retina indicating different transcriptional regulation. We also found that inpp5kb has lost its catalytic activity against its preferred substrate, PtdIns(4,5)P2. Since most human mutations are missense changes disrupting phosphatase activity, we propose that loss of inpp5ka alone can be targeted to recapitulate the human presentation. In addition, we show that the function of inpp5kb has diverged from inpp5ka and may play a novel role in the zebrafish.
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Affiliation(s)
- Dhyanam Shukla
- Department of Neuroscience and Cell Biology and Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, 89 French Street, CHINJ Rm 3274, New Brunswick, NJ, 08901, USA
| | - Brian M Gural
- Department of Neuroscience and Cell Biology and Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, 89 French Street, CHINJ Rm 3274, New Brunswick, NJ, 08901, USA
| | - Edmund S Cauley
- Department of Biochemistry and Molecular Medicine, School of Medicine and Health Sciences, The George Washington University, Washington, DC, USA
| | - Namarata Battula
- Department of Neuroscience and Cell Biology and Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, 89 French Street, CHINJ Rm 3274, New Brunswick, NJ, 08901, USA
| | - Shorbon Mowla
- Department of Neuroscience and Cell Biology and Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, 89 French Street, CHINJ Rm 3274, New Brunswick, NJ, 08901, USA
| | - Brittany F Karas
- Department of Neuroscience and Cell Biology and Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, 89 French Street, CHINJ Rm 3274, New Brunswick, NJ, 08901, USA
| | - Llion E Roberts
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - Luca Cavallo
- Department of Neuroscience and Cell Biology and Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, 89 French Street, CHINJ Rm 3274, New Brunswick, NJ, 08901, USA
| | - Luka Turkalj
- Department of Neuroscience and Cell Biology and Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, 89 French Street, CHINJ Rm 3274, New Brunswick, NJ, 08901, USA
| | - Sally A Moody
- Department of Anatomy and Cell Biology, School of Medicine and Health Sciences, The George Washington University, Washington, DC, USA
| | - Laura E Swan
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - M Chiara Manzini
- Department of Neuroscience and Cell Biology and Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, 89 French Street, CHINJ Rm 3274, New Brunswick, NJ, 08901, USA.
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Schurmans S, Vande Catsyne CA, Desmet C, Moës B. The phosphoinositide 5-phosphatase INPP5K: From gene structure to in vivo functions. Adv Biol Regul 2021; 79:100760. [PMID: 33060052 DOI: 10.1016/j.jbior.2020.100760] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/05/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
INPP5K (Inositol Polyphosphate 5-Phosphatase K, or SKIP (for Skeletal muscle and Kidney enriched Inositol Phosphatase) is a member of the phosphoinositide 5-phosphatases family. Its protein structure is comprised of a N-terminal catalytic domain which hydrolyses both PtdIns(4,5)P2 and PtdIns(3,4,5)P3, followed by a SKICH domain at the C-terminus which is responsible for protein-protein interactions and subcellular localization of INPP5K. Strikingly, INPP5K is mostly concentrated in the endoplasmic reticulum, although it is also detected at the plasma membrane, in the cytosol and the nucleus. Recently, mutations in INPP5K have been detected in patients with a rare form of autosomal recessive congenital muscular dystrophy with cataract, short stature and intellectual disability. INPP5K functions extend from control of insulin signaling, endoplasmic reticulum stress response and structural integrity, myoblast differentiation, cytoskeleton organization, cell adhesion and migration, renal osmoregulation, to cancer. The goal of this review is thus to summarize and comment recent and less recent data in the literature on INPP5K, in particular on the structure, expression, intracellular localization, interactions and functions of this specific member of the 5-phosphatases family.
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Affiliation(s)
- Stéphane Schurmans
- Laboratoire de Génétique Fonctionnelle, GIGA-Research Centre, Building B34, CHU Sart-Tilman, Université de Liège, Avenue de l'Hôpital 11, 4000-Liège, Belgium; Secteur de Biochimie Métabolique Vétérinaire, Département des Sciences Fonctionnelles, Faculté de Médecine Vétérinaire, Building B42, Université de Liège, Quartier Vallée 2, Avenue de Cureghem 7A-7D, 4000-Liège, Belgium.
| | - Charles-Andrew Vande Catsyne
- Laboratoire de Génétique Fonctionnelle, GIGA-Research Centre, Building B34, CHU Sart-Tilman, Université de Liège, Avenue de l'Hôpital 11, 4000-Liège, Belgium
| | - Christophe Desmet
- Laboratory of Cellular and Molecular Immunology, GIGA-Research Centre, Building B34, CHU Sart-Tilman, Université de Liège, Avenue de l'Hôpital 11, 4000-Liège, Belgium
| | - Bastien Moës
- Laboratoire de Génétique Fonctionnelle, GIGA-Research Centre, Building B34, CHU Sart-Tilman, Université de Liège, Avenue de l'Hôpital 11, 4000-Liège, Belgium
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Ijuin T, Hatano N, Takenawa T. Glucose-regulated protein 78 (GRP78) binds directly to PIP3 phosphatase SKIP and determines its localization. Genes Cells 2016; 21:457-65. [PMID: 26940976 DOI: 10.1111/gtc.12353] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 01/31/2016] [Indexed: 11/29/2022]
Abstract
Skeletal muscle and kidney-enriched inositol polyphosphate phosphatase (SKIP), a PIP3 phosphatase, has been implicated in the regulation of insulin signaling in skeletal muscle. SKIP interacts with Pak1 and glucose-regulated protein 78 (GRP78), both of which are necessary for the regulation of insulin signaling. In this study, we showed that GRP78 directly binds to the SKIP C-terminal homology (SKICH) domain of SKIP and that this binding is necessary for the localization of SKIP at the ER. In addition, in vitro binding analysis showed that GRP78 and Pak1 competitively bind to SKIP. Taken together, these findings suggest a model by which GRP78 regulates intracellular localization of SKIP and how SKIP binds to Pak1 on insulin stimulation.
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Affiliation(s)
- Takeshi Ijuin
- Division of Biochemistry, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki Chu-o, Kobe, 650-0017, Japan
| | - Naoya Hatano
- The Integrated Center for Mass Spectrometry, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki Chu-o, Kobe, 650-0017, Japan
| | - Tadaomi Takenawa
- Division of Membrane Biology, Biosignal Research Center, Kobe University, Kobe, 657-8501, Japan
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Ijuin T, Hatano N, Hosooka T, Takenawa T. Regulation of insulin signaling in skeletal muscle by PIP3 phosphatase, SKIP, and endoplasmic reticulum molecular chaperone glucose-regulated protein 78. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2015; 1853:3192-201. [DOI: 10.1016/j.bbamcr.2015.09.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 09/08/2015] [Accepted: 09/10/2015] [Indexed: 12/30/2022]
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