A rice high-affinity potassium transporter (HKT) conceals a calcium-permeable cation channel
نویسندگان
چکیده
منابع مشابه
Characterization of a HKT-type transporter in rice as a general alkali cation transporter.
We report the characterization of rice OsHKT1 (Oryza sativa ssp. indica) homologous to the wheat K+/Na+-symporter HKT1. Expression of OsHKT1 in the yeast strain CY162 defective in K+-uptake restored growth at mM and micro M concentrations of K+ and mediated hypersensitivity to Na+. When expressed in Xenopus oocytes, rice OsHKT1 showed uptake characteristics of a Na+-transporter but mediated tra...
متن کاملIn silico analysis of high affinity potassium transporter (HKT) isoforms in different plants
BACKGROUND High affinity potassium transporters (HKTs) are located in the plasma membrane of the vessels and have significant influence on salt tolerance in some plants. They exclude Na(+) from the parenchyma cells to reduce Na(+) concentration. Despite many studies, the underlying regulatory mechanisms and the exact functions of HKTs within different genomic backgrounds are relatively unknown....
متن کاملOsHAK1, a High-Affinity Potassium Transporter, Positively Regulates Responses to Drought Stress in Rice
Drought is one of the environmental factors that severely restrict plant distribution and crop production. Recently, we reported that the high-affinity potassium transporter OsHAK1 plays important roles in K acquisition and translocation in rice over low and high K concentration ranges, however, knowledge on the regulatory roles of OsHAK1 in osmotic/drought stress is limited. Here, transcript l...
متن کاملThe versatile nature of the calcium-permeable cation channel TRPP2.
TRPP2 is a member of the transient receptor potential (TRP) superfamily of cation channels, which is mutated in autosomal dominant polycystic kidney disease (ADPKD). TRPP2 is thought to function with polycystin 1-a large integral protein-as part of a multiprotein complex involved in transducing Ca(2+)-dependent information. TRPP2 has been implicated in various biological functions including cel...
متن کاملCloning and Functional Expression of a Human Ca2+-Permeable Cation Channel Activated by Calcium Store Depletion
Depletion of intracellular calcium stores generates a signal that activates Ca2+-permeable channels in the plasma membrane. We have identified a human cDNA, TRPC1A, from a human fetal brain cDNA library. TRPC1A is homologous to the cation channels trp and trpl in Drosophila and is a splice variant of the recently identified cDNA Htrp-1. Expression of TRPC1A in CHO cells induced nonselective cat...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2010
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1000698107