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Filipek PA, de Araujo MEG, Vogel GF, De Smet CH, Eberharter D, Rebsamen M, Rudashevskaya EL, Kremser L, Yordanov T, Tschaikner P, Fürnrohr BG, Lechner S, Dunzendorfer-Matt T, Scheffzek K, Bennett KL, Superti-Furga G, Lindner HH, Stasyk T, Huber LA. LAMTOR/Ragulator is a negative regulator of Arl8b- and BORC-dependent late endosomal positioning. J Cell Biol 2017; 216:4199-4215. [PMID: 28993467 PMCID: PMC5716276 DOI: 10.1083/jcb.201703061] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 07/28/2017] [Accepted: 09/11/2017] [Indexed: 12/18/2022] Open
Abstract
Signaling from lysosomes controls cellular clearance and energy metabolism. Lysosomal malfunction has been implicated in several pathologies, including neurodegeneration, cancer, infection, immunodeficiency, and obesity. Interestingly, many functions are dependent on the organelle position. Lysosomal motility requires the integration of extracellular and intracellular signals that converge on a competition between motor proteins that ultimately control lysosomal movement on microtubules. Here, we identify a novel upstream control mechanism of Arl8b-dependent lysosomal movement toward the periphery of the cell. We show that the C-terminal domain of lyspersin, a subunit of BLOC-1-related complex (BORC), is essential and sufficient for BORC-dependent recruitment of Arl8b to lysosomes. In addition, we establish lyspersin as the linker between BORC and late endosomal/lysosomal adaptor and mitogen activated protein kinase and mechanistic target of rapamycin activator (LAMTOR) complexes and show that epidermal growth factor stimulation decreases LAMTOR/BORC association, thereby promoting BORC- and Arl8b-dependent lysosomal centrifugal transport.
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Affiliation(s)
- Przemyslaw A Filipek
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Mariana E G de Araujo
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Georg F Vogel
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria.,Department of Pediatrics I, Innsbruck Medical University, Innsbruck, Austria
| | - Cedric H De Smet
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Daniela Eberharter
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Manuele Rebsamen
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Elena L Rudashevskaya
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.,Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., Dortmund, Germany
| | - Leopold Kremser
- Division of Clinical Biochemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Teodor Yordanov
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Philipp Tschaikner
- Institute for Molecular Biology, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
| | - Barbara G Fürnrohr
- Division of Biological Chemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Stefan Lechner
- Division of Biological Chemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | | | - Klaus Scheffzek
- Division of Biological Chemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Keiryn L Bennett
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Giulio Superti-Furga
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.,Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Herbert H Lindner
- Division of Clinical Biochemistry, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Taras Stasyk
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
| | - Lukas A Huber
- Division of Cell Biology, Biocenter, Innsbruck Medical University, Innsbruck, Austria
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