Roles of Major Facilitator Superfamily Transporters in Phosphate Response in Drosophila
The major facilitator superfamily (MFS) transporter Pho84 and the type III transporter Pho89 are responsible for metabolic effects of inorganic phosphate in yeast. While the Pho89 ortholog Pit1 was also shown to be involved in phosphate-activated MAPK in mammalian cells, it is currently unknown, whe...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Public Library of Science
2012
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| Online Access: | http://hdl.handle.net/1721.1/70083 |
| _version_ | 1826199134181261312 |
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| author | Bergwitz, Clemens Rasmussen, Matthew D. DeRobertis, Charles Wee, Mark J. Sinha, Sumi Chen, Hway H. Huang, Joanne Perrimon, Norbert |
| author2 | Massachusetts Institute of Technology. Computer Science and Artificial Intelligence Laboratory |
| author_facet | Massachusetts Institute of Technology. Computer Science and Artificial Intelligence Laboratory Bergwitz, Clemens Rasmussen, Matthew D. DeRobertis, Charles Wee, Mark J. Sinha, Sumi Chen, Hway H. Huang, Joanne Perrimon, Norbert |
| author_sort | Bergwitz, Clemens |
| collection | MIT |
| description | The major facilitator superfamily (MFS) transporter Pho84 and the type III transporter Pho89 are responsible for metabolic effects of inorganic phosphate in yeast. While the Pho89 ortholog Pit1 was also shown to be involved in phosphate-activated MAPK in mammalian cells, it is currently unknown, whether orthologs of Pho84 have a role in phosphate-sensing in metazoan species. We show here that the activation of MAPK by phosphate observed in mammals is conserved in Drosophila cells, and used this assay to characterize the roles of putative phosphate transporters. Surprisingly, while we found that RNAi-mediated knockdown of the fly Pho89 ortholog dPit had little effect on the activation of MAPK in Drosophila S2R+ cells by phosphate, two Pho84/SLC17A1–9 MFS orthologs (MFS10 and MFS13) specifically inhibited this response. Further, using a Xenopus oocyte assay, we show that MSF13 mediates uptake of [³³P]-orthophosphate in a sodium-dependent fashion. Consistent with a role in phosphate physiology, MSF13 is expressed highest in the Drosophila crop, midgut, Malpighian tubule, and hindgut. Altogether, our findings provide the first evidence that Pho84 orthologs mediate cellular effects of phosphate in metazoan cells. Finally, while phosphate is essential for Drosophila larval development, loss of MFS13 activity is compatible with viability indicating redundancy at the levels of the transporters. |
| first_indexed | 2024-09-23T11:14:56Z |
| format | Article |
| id | mit-1721.1/70083 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:14:56Z |
| publishDate | 2012 |
| publisher | Public Library of Science |
| record_format | dspace |
| spelling | mit-1721.1/700832022-09-27T18:08:46Z Roles of Major Facilitator Superfamily Transporters in Phosphate Response in Drosophila Bergwitz, Clemens Rasmussen, Matthew D. DeRobertis, Charles Wee, Mark J. Sinha, Sumi Chen, Hway H. Huang, Joanne Perrimon, Norbert Massachusetts Institute of Technology. Computer Science and Artificial Intelligence Laboratory Rasmussen, Matthew D. Rasmussen, Matthew D. The major facilitator superfamily (MFS) transporter Pho84 and the type III transporter Pho89 are responsible for metabolic effects of inorganic phosphate in yeast. While the Pho89 ortholog Pit1 was also shown to be involved in phosphate-activated MAPK in mammalian cells, it is currently unknown, whether orthologs of Pho84 have a role in phosphate-sensing in metazoan species. We show here that the activation of MAPK by phosphate observed in mammals is conserved in Drosophila cells, and used this assay to characterize the roles of putative phosphate transporters. Surprisingly, while we found that RNAi-mediated knockdown of the fly Pho89 ortholog dPit had little effect on the activation of MAPK in Drosophila S2R+ cells by phosphate, two Pho84/SLC17A1–9 MFS orthologs (MFS10 and MFS13) specifically inhibited this response. Further, using a Xenopus oocyte assay, we show that MSF13 mediates uptake of [³³P]-orthophosphate in a sodium-dependent fashion. Consistent with a role in phosphate physiology, MSF13 is expressed highest in the Drosophila crop, midgut, Malpighian tubule, and hindgut. Altogether, our findings provide the first evidence that Pho84 orthologs mediate cellular effects of phosphate in metazoan cells. Finally, while phosphate is essential for Drosophila larval development, loss of MFS13 activity is compatible with viability indicating redundancy at the levels of the transporters. National Institutes of Health (U.S.) (NIDDK 5K08DK078361) Harvard Catalyst 2012-04-20T16:41:04Z 2012-04-20T16:41:04Z 2012-02 2011-12 Article http://purl.org/eprint/type/JournalArticle 1932-6203 http://hdl.handle.net/1721.1/70083 Bergwitz, Clemens et al. “Roles of Major Facilitator Superfamily Transporters in Phosphate Response in Drosophila.” Ed. Shree Ram Singh. PLoS ONE 7.2 (2012): e31730. Web. 20 Apr. 2012. en_US http://dx.doi.org/10.1371/journal.pone.0031730 PLoS ONE Creative Commons Attribution http://creativecommons.org/licenses/by/2.5/ application/pdf Public Library of Science PLoS |
| spellingShingle | Bergwitz, Clemens Rasmussen, Matthew D. DeRobertis, Charles Wee, Mark J. Sinha, Sumi Chen, Hway H. Huang, Joanne Perrimon, Norbert Roles of Major Facilitator Superfamily Transporters in Phosphate Response in Drosophila |
| title | Roles of Major Facilitator Superfamily Transporters in Phosphate Response in Drosophila |
| title_full | Roles of Major Facilitator Superfamily Transporters in Phosphate Response in Drosophila |
| title_fullStr | Roles of Major Facilitator Superfamily Transporters in Phosphate Response in Drosophila |
| title_full_unstemmed | Roles of Major Facilitator Superfamily Transporters in Phosphate Response in Drosophila |
| title_short | Roles of Major Facilitator Superfamily Transporters in Phosphate Response in Drosophila |
| title_sort | roles of major facilitator superfamily transporters in phosphate response in drosophila |
| url | http://hdl.handle.net/1721.1/70083 |
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