1
|
Werner S, Okenve-Ramos P, Hehlert P, Zitouni S, Priya P, Mendonça S, Sporbert A, Spalthoff C, Göpfert MC, Jana SC, Bettencourt-Dias M. IFT88 maintains sensory function by localising signalling proteins along Drosophila cilia. Life Sci Alliance 2024; 7:e202302289. [PMID: 38373798 PMCID: PMC10876440 DOI: 10.26508/lsa.202302289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/21/2024] Open
Abstract
Ciliary defects cause several ciliopathies, some of which have late onset, suggesting cilia are actively maintained. Still, we have a poor understanding of the mechanisms underlying their maintenance. Here, we show Drosophila melanogaster IFT88 (DmIFT88/nompB) continues to move along fully formed sensory cilia. We further identify Inactive, a TRPV channel subunit involved in Drosophila hearing and negative-gravitaxis behaviour, and a yet uncharacterised Drosophila Guanylyl Cyclase 2d (DmGucy2d/CG34357) as DmIFT88 cargoes. We also show DmIFT88 binding to the cyclase´s intracellular part, which is evolutionarily conserved and mutated in several degenerative retinal diseases, is important for the ciliary localisation of DmGucy2d. Finally, acute knockdown of both DmIFT88 and DmGucy2d in ciliated neurons of adult flies caused defects in the maintenance of cilium function, impairing hearing and negative-gravitaxis behaviour, but did not significantly affect ciliary ultrastructure. We conclude that the sensory ciliary function underlying hearing in the adult fly requires an active maintenance program which involves DmIFT88 and at least two of its signalling transmembrane cargoes, DmGucy2d and Inactive.
Collapse
Affiliation(s)
- Sascha Werner
- https://ror.org/04b08hq31 Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Pilar Okenve-Ramos
- https://ror.org/04b08hq31 Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Philip Hehlert
- Department of Cellular Neurobiology, University of Göttingen, Göttingen, Germany
| | - Sihem Zitouni
- https://ror.org/04b08hq31 Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Institut de Génétique Humaine (IGH), UMR, 9002 CNRS, Montpellier, France
| | - Pranjali Priya
- National Centre for Biological Sciences- TIFR, Bangalore, India
| | - Susana Mendonça
- https://ror.org/04b08hq31 Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - Anje Sporbert
- Advanced Light Microscopy, Max Delbrück Centrum for Molecular Medicine Berlin in the Helmholtz Association, Berlin, Germany
| | - Christian Spalthoff
- Department of Cellular Neurobiology, University of Göttingen, Göttingen, Germany
| | - Martin C Göpfert
- Department of Cellular Neurobiology, University of Göttingen, Göttingen, Germany
| | - Swadhin Chandra Jana
- https://ror.org/04b08hq31 Instituto Gulbenkian de Ciência, Oeiras, Portugal
- National Centre for Biological Sciences- TIFR, Bangalore, India
| | | |
Collapse
|
2
|
Turek I, Freihat L, Vyas J, Wheeler J, Muleya V, Manallack DT, Gehring C, Irving H. The discovery of hidden guanylate cyclases (GCs) in the Homo sapiens proteome. Comput Struct Biotechnol J 2023; 21:5523-5529. [PMID: 38022692 PMCID: PMC10665587 DOI: 10.1016/j.csbj.2023.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 10/31/2023] [Accepted: 11/01/2023] [Indexed: 12/01/2023] Open
Abstract
Recent discoveries have established functional guanylate cyclase (GC) catalytic centers with low activity within kinase domains in plants. These crypto GCs generate guanosine 3',5'-cyclic monophosphate (cGMP) essential for both intramolecular and downstream signaling. Here, we have set out to search for such crypto GCs moonlighting in kinases in the H. sapiens proteome and identified 18 candidates, including the neurotropic receptor tyrosine kinase 1 (NTRK1). NTRK1 shows a domain architecture much like plant receptor kinases such as the phytosulfokine receptor, where a functional GC essential for downstream signaling is embedded within a kinase domain. In vitro characterization of the NTRK1 shows that the embedded NTRK1 GC is functional with a marked preference for Mn2+ over Mg2+. This therefore points to hitherto unsuspected roles of cGMP in intramolecular and downstream signaling of NTRK1 and the role of cGMP in NTRK1-dependent growth and neoplasia.
Collapse
Affiliation(s)
- Ilona Turek
- La Trobe Institute for Molecular Science, La Trobe University, Bendigo, VIC 3550, Australia
- Department of Rural Clinical Sciences, La Trobe Rural Health School, La Trobe University, Bendigo, VIC 3550, Australia
| | - Lubna Freihat
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Jignesh Vyas
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Janet Wheeler
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
- Department of Animal, Plant and Soil Science, La Trobe University, AgriBio building, Bundoora, VIC 3086, Australia
| | - Victor Muleya
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - David T. Manallack
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Chris Gehring
- Department of Chemistry, Biochemistry and Biotechnology, University of Perugia, 06121 Perugia, Italy
| | - Helen Irving
- La Trobe Institute for Molecular Science, La Trobe University, Bendigo, VIC 3550, Australia
- Department of Rural Clinical Sciences, La Trobe Rural Health School, La Trobe University, Bendigo, VIC 3550, Australia
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| |
Collapse
|
3
|
Neissi M, Al-Badran AI, Mohammadi-Asl J. Exome sequencing identifies a novel GUCY2D mutation in an Iranian family with Leber congenital amaurosis-1: a case report. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2022. [DOI: 10.1186/s43042-022-00217-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Leber congenital amaurosis (LCA), the severe form of inherited retinal degenerative disorder, is a prevalent disorder in the first year of life. Recently, genetic studies discovered that different gene mutations are responsible for LCA clinical manifestations.
Case presentation
In this study, we applied whole exome sequencing (WES) to identify probable gene defects in an Iranian girl with LCA-1. We found a novel disease-causing GUCY2D gene mutation (c.2348T > C; p.L783P), located in exon 12 (NM_000180), causing a missense mutation that has been changed the coding protein. The WES-identified variant was confirmed by Sanger sequencing for the patient and her healthy parents. Submitted to genetic counseling that the patient was 1-year old and blindness from birth.
Conclusions
Our findings establish that this detected GUCY2D-p.L783P mutation is the pathogenic variant for LCA-1. This is the first genetic study indicating that c.2348T > C missense mutation in the homozygous state in GUCY2D gene is responsible for the LCA-1 phenotype.
Collapse
|