Mitochondrial energy metabolism regulates the nutrient import activity and endocytosis of APC transporters.
Mitochondrial energy metabolism regulates the nutrient import activity and endocytosis of APC transporters.
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DOI:
10.1002/1873-3468.14314
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发表时间:
2022-05
期刊:
影响因子:
3.5
通讯作者:
Babst, Markus
中科院分区:
文献类型:
--
作者:
Moharir, Akshay;Gay, Lincoln;Babst, Markus
Nutrient import by APC-type transporters is predicted to have a high energy demand because it depends on the plasma membrane proton gradient established by the ATP-driven proton pump Pma1. We show that Pma1 is indeed a major energy consumer and its activity is tightly linked to the cellular ATP levels. The low Pma1 activity caused by acute loss of respiration resulted in a dramatic drop in cytoplasmic pH, which triggered the downregulation of the major proton importers, the APC transporters. This regulatory system is likely the reason for the observed rapid endocytosis of APC transporters during many environmental stresses. Furthermore, we show the importance of respiration in providing ATP to maintain a strong proton gradient for efficient nutrient uptake. Our study highlights the importance of respiration for Saccharomyces cerevisiae strains commonly used for cell biological studies. We show that fermentation does not compensate for the lack of mitochondrial ATP production. As a consequence, loss of respiration reduces the plasma membrane proton gradient, which slows both nutrient import and growth.
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影响因子:
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作者:
Fendt SM;Sauer U
通讯作者:
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DOI:
10.1083/jcb.201610094
发表时间:
2017-06-05
期刊:
The Journal of cell biology
影响因子:
--
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通讯作者:
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DOI:
10.1111/tra.12039
发表时间:
2013-04
期刊:
Traffic (Copenhagen, Denmark)
影响因子:
--
作者:
Keener JM;Babst M
通讯作者:
Babst M
影响因子:
3.9
作者:
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通讯作者:
Kim, JH