Na +/H + antiport in isolated plasma membrane vesicles from the halotolerant alga Dunaliella salina
Plasma membrane vesicles isolated from the halotolerant alga Dunaliella salina catalyze Na +/H + antiport in a manner that is highly specific for Na + (apparent K m ≅ 16 mM). Li + and amiloride inhibit the process competitively with apparent K i values of 38 and 37 μM, respectively. It is suggested...
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Published in | FEBS letters Vol. 202; no. 1; pp. 141 - 144 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
23.06.1986
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Plasma membrane vesicles isolated from the halotolerant alga
Dunaliella salina catalyze Na
+/H
+ antiport in a manner that is highly specific for Na
+ (apparent
K
m ≅ 16 mM). Li
+ and amiloride inhibit the process competitively with apparent
K
i values of 38 and 37 μM, respectively. It is suggested that Na
+/H
+ antiport in this organism plays a major role in maintaining low intracellular Na
+ concentrations and may also function to drive Na
+/HCO
3
− symport, an important step in photosynthetic carbon fixation. |
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ISSN: | 0014-5793 1873-3468 |
DOI: | 10.1016/0014-5793(86)80665-2 |