Genetic evidence against involvement of TRPC proteins in SOCE, ROCE, and CRAC channel function
Using genetically engineered mice and cell lines derived from genetically engineered mice we show that depletion of ER delimited Ca2+ stores activates heteromeric Ca2+ entry (SOCE) channels formed obligatorily, but not exclusively by Orai1 molecules. Comparison of Orai-dependent Ca2+ entries reveale...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2024
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| In: |
Proceedings of the National Academy of Sciences of the United States of America
Year: 2024, Volume: 121, Issue: 49, Pages: 1-12 |
| ISSN: | 1091-6490 |
| DOI: | 10.1073/pnas.2411389121 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1073/pnas.2411389121 Verlag, kostenfrei, Volltext: https://www.pnas.org/doi/10.1073/pnas.2411389121 
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| Author Notes: | Sebastian Susperreguy, Megumi Yamashita, Chan-il Choi, Yanhong Liao, Lauranell H. Burch, Terry L. Blankenship, Erika Hayes, Thomas Sliwa, Yingpei Zhang, Dagoberto Grenet, Mitzie Walker, Nicholas W. Plummer, Joel Abramowitz, Jean Pierre Kinet, Karina Formoso, Brandon E. Johnson, Andrea Fleig, Lori Hazlehurst, Reinhold Penner, Marc Freichel, Veit Flockerzi, Murali Prakriya, and Lutz Birnbaumer |
MARC
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| 245 | 1 | 0 | |a Genetic evidence against involvement of TRPC proteins in SOCE, ROCE, and CRAC channel function |c Sebastian Susperreguy, Megumi Yamashita, Chan-il Choi, Yanhong Liao, Lauranell H. Burch, Terry L. Blankenship, Erika Hayes, Thomas Sliwa, Yingpei Zhang, Dagoberto Grenet, Mitzie Walker, Nicholas W. Plummer, Joel Abramowitz, Jean Pierre Kinet, Karina Formoso, Brandon E. Johnson, Andrea Fleig, Lori Hazlehurst, Reinhold Penner, Marc Freichel, Veit Flockerzi, Murali Prakriya, and Lutz Birnbaumer |
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| 520 | |a Using genetically engineered mice and cell lines derived from genetically engineered mice we show that depletion of ER delimited Ca2+ stores activates heteromeric Ca2+ entry (SOCE) channels formed obligatorily, but not exclusively by Orai1 molecules. Comparison of Orai-dependent Ca2+ entries revealed Orai1 to be dominant when compared to Orai2 and Orai3. Unexpectedly, we found that store-depletion-activated Ca2+ entry does not depend obligatorily on functionally intact TRPC molecules, as SOCE monitored with the Fura2 Ca2+ reporter dye is unaffected in cells in which all seven TRPC coding genes have been structurally and functionally inactivated. Unexpectedly as well, we found that TRPC-independent Gq-coupled receptor-operated Ca2+ entry (ROCE) also depends on Orai1. Biophysical measurements of Ca2+ release activated Ca2+ currents (Icrac) are likewise unaffected by ablation of all seven TRPC genes. We refer to mice and cells carrying the seven-fold disruption of TRPC genes as TRPC heptaKO mice and cells. TRPC heptaKO mice are fertile allowing the creation of a new homozygous inbred strain. | ||
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