P-Type ATPase Apt1 of the fungal pathogen \(\textit {Cryptococcus neoformans}\) is a lipid flippase of broad substrate specificity
- Lipid flippases of the P4-ATPase family are ATP-driven transporters that translocate lipids from the exoplasmic to the cytosolic leaflet of biological membranes. In the encapsulated fungal pathogen \(\textit {Cryptococcus neoformans}\), the P4-ATPase Apt1p is an important regulator of polysaccharide secretion and pathogenesis, but its biochemical characterization is lacking. Phylogenetic analysis revealed that Apt1p belongs to the subclade of P4A-ATPases characterized by the common requirement for a \(\beta\)-subunit. Using heterologous expression in \(\textit {S. cerevisiae}\), we demonstrate that Apt1p forms a heterodimeric complex with the \(\textit {C. neoformans}\) Cdc50 protein. This association is required for both localization and activity of the transporter complex. Lipid flippase activity of the heterodimeric complex was assessed by complementation tests and uptake assays employing fluorescent lipids and revealed a broad substrate specificity, including several phospholipids, the alkylphospholipid miltefosine, and the glycolipids glucosyl- and galactosylceramide. Our results suggest that transbilayer lipid transport in \(\textit {C. neoformans}\) is finely regulated to promote fungal virulence, which reinforces the potential of Apt1p as a target for antifungal drug development.
Author: | Lyubomir Dimitrov StanchevORCiDGND, Juliana RizzoORCiDGND, Rebecca PeschelORCiDGND, Lilli A. PazurekORCiDGND, Lasse BredegaardGND, Sarina VeitORCiDGND, Sabine LaerbuschGND, Marcio L. RodriguesORCiDGND, Rosa Laura López-MarquésORCiDGND, Thomas Günther-PomorskiORCiDGND |
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URN: | urn:nbn:de:hbz:294-86201 |
DOI: | https://doi.org/10.3390/jof7100843 |
Parent Title (English): | Journal of fungi |
Publisher: | MDPI |
Place of publication: | Basel |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2022/02/20 |
Date of first Publication: | 2021/10/08 |
Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
Tag: | Open Access Fonds CDC50 protein; P4-ATPase; \(\beta\)-subunit; heterologous expression; lipid transport; membrane transport protein |
Volume: | 7 |
Issue: | 10, Article 843 |
First Page: | 843-1 |
Last Page: | 843-16 |
Note: | Article Processing Charge funded by the Open Access Publication Fund of Ruhr-Universität Bochum. |
Institutes/Facilities: | Lehrstuhl Biochemie II, Molekulare Biochemie |
Dewey Decimal Classification: | Naturwissenschaften und Mathematik / Chemie, Kristallographie, Mineralogie |
open_access (DINI-Set): | open_access |
faculties: | Fakultät für Chemie und Biochemie |
Licence (English): | Creative Commons - CC BY 4.0 - Attribution 4.0 International |