ArticleThe Plant cell1998
AtKUP1: an Arabidopsis gene encoding high-affinity potassium transport activity.
Article in The Plant cell, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 109 papers.
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Who cites it
109 citing papers in PubMed, 329 citations in OpenAlex.
- Quantitative Proteomic Analysis of Brassica Napus Reveals Intersections Between Nutrient Deficiency Responses.Plant, cell & environment · 2025Article
- Arabidopsis HAK5 under low KNature communications · 2024Article
- Genome-wide identification of kiwifruit KBMC plant biology · 2024Article
- Positive Regulatory Roles ofPlants (Basel, Switzerland) · 2024Article
- The Sweet Potato KPlants (Basel, Switzerland) · 2023Article
- Transcriptional and metabolic responses of apple to different potassium environments.Frontiers in plant science · 2023Article
- Dimerisation of the Yeast KInternational journal of molecular sciences · 2022Article
- Potassium transporter KUP9 participates in KStress biology · 2022Article
- Comparative transcriptome analysis between inbred lines and hybrids provides molecular insights into KFrontiers in plant science · 2022Article
- Characterization of HAK protein family inFrontiers in plant science · 2022Article
- Wheat potassium transporter TaHAK13 mediates KFrontiers in plant science · 2022Article
- Cesium tolerance is enhanced by a chemical which binds to BETA-GLUCOSIDASE 23 in Arabidopsis thaliana.Scientific reports · 2021Article
- Recent Advances in Genome-wide Analyses of Plant Potassium Transporter Families.Current genomics · 2021Review
- Article
- Identification and characterization of HAK/KUP/KT potassium transporter gene family in barley and their expression under abiotic stress.BMC genomics · 2021Article
- Potassium Control of Plant Functions: Ecological and Agricultural Implications.Plants (Basel, Switzerland) · 2021Article
- Genome-Wide Investigation and Expression Analysis of KBiochemical genetics · 2021Article
- Potential Networks of Nitrogen-Phosphorus-Potassium Channels and Transporters in Arabidopsis Roots at a Single Cell Resolution.Frontiers in plant science · 2021Article
- Article
- Genome-wide characterization and expression analysis of HAK K3 Biotech · 2021Article
49 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Because plants grow under many different types of soil and environmental conditions, we investigated the hypothesis that multiple pathways for K+ uptake exist in plants. We have identified a new family of potassium transporters from Arabidopsis by searching for homologous sequences among the expressed sequence tags of the GenBank database. The deduced amino acid sequences of AtKUP (for Arabidopsis thaliana K+ uptake transporter) cDNAs are highly homologous to the non-plant Kup and HAK1 potassium transporters from Escherichia coli and Schwanniomyces occidentalis, respectively. Interestingly, AtKUP1 and AtKUP2 are able to complement the potassium transport deficiency of an E. coli triple mutant. In addition, transgenic Arabidopsis suspension cells overexpressing AtKUP1 showed increased Rb+ uptake at micromolar concentrations with an apparent K(m) of approximately 22 microM, indicating that AtKUP1 encodes a high-affinity potassium uptake activity in vivo. A small, low-affinity Rb+ uptake component was also detected in AtKUP1-expressing cells. RNA gel blot analysis showed that the various members of the AtKUP family have distinct patterns of expression, with AtKUP3 transcript levels being strongly induced by K+ starvation. It is proposed that plants contain multiple potassium transporters for high-affinity uptake and that the AtKUP family may provide important components of high- and low-affinity K+ nutrition and uptake into various plant cell types.
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