High Affinity K+ transporter HAK5 (original) (raw)
High Affinity K+ transporter HAK5 is a transport protein found on the cell surface membrane of plants under conditions of potassium deprivation. It is believed to act as a symporter for protons and the potassium ion, K+. Firstly discovered in barley, receiving the name of HvHAK1, it was soon after identified in the model plant Arabidopsis thaliana and named HAK5. These transporters belongs to the subgroup I of the KT-HAK-KUP family of plant proteins with obvious homology with both bacterial and fungal transport systems, which experienced a major diversification following land conquest. KT-HAK-KUP transporters are one of four different types of K+ transporter within the cell, but are unique as they do not have a putative pore forming domain like the other three; Shaker channels, KCO channel
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| dbo:abstract | High Affinity K+ transporter HAK5 is a transport protein found on the cell surface membrane of plants under conditions of potassium deprivation. It is believed to act as a symporter for protons and the potassium ion, K+. Firstly discovered in barley, receiving the name of HvHAK1, it was soon after identified in the model plant Arabidopsis thaliana and named HAK5. These transporters belongs to the subgroup I of the KT-HAK-KUP family of plant proteins with obvious homology with both bacterial and fungal transport systems, which experienced a major diversification following land conquest. KT-HAK-KUP transporters are one of four different types of K+ transporter within the cell, but are unique as they do not have a putative pore forming domain like the other three; Shaker channels, KCO channels, HKT transporters. It is activated when the plant is situated in low soil with low potassium concentration, and has been shown to be located in higher concentration in the epidermis and vasculature of K+ deprived plants. By turning on, it increases the plants affinity (uptake) of potassium. Potassium plays a vital role in the plants growth, reproduction, immunity, ion homeostasis, and osmosis, which ensures the plants survival. It is the highest cationic molecule within the plant, accounting for 10% of the plants dry weight, which makes its uptake into the plant important. Each plant species has its own HAK5 transporter that is specific to that species and has different levels of affinity to K+. To operate and activate the HAK5 transporter, the external concentration of K+ must be lower than 10μM and up to 200μM. In Arabidopsis plants, when external potassium concentration is lower than 10μM, it is only HAK5 that is involved with the uptake of K+, then between 10 and 200μM both HAK5 and AKT1 are involved with the uptake of K+. HAK5 is coupled with CBL9/CIPK23 kinase's although the mechanism behind this has not yet been understood. (en) |
| dbo:thumbnail | wiki-commons:Special:FilePath/HAK5_Protein_sequence.jpg?width=300 |
| dbo:wikiPageExternalLink | https://www.wikigenes.org/e/gene/e/826973.html http://www.ihop-net.org/UniPub/iHOP/gs/12299.html https://www.ncbi.nlm.nih.gov/gene/826973 https://www.uniprot.org/uniprot/Q5JK32 https://www.uniprot.org/uniprot/W5U4R8 |
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| dbo:wikiPageWikiLink | dbr:Potassium dbr:Protons dbr:Plasma_membrane dbr:Integrin-linked_kinase dbr:Osmosis dbr:Pathogen-associated_molecular_pattern dbr:Pattern_recognition_receptor dbr:Bacteria dbc:Transport_proteins dbr:Lipopolysaccharide dbr:Glycan dbr:Glycoconjugate dbr:AKT1 dbr:CBL_(gene) dbr:Photosynthesis dbr:Reactive_oxygen_species dbr:Salinity dbr:Symporter dbr:Transport_protein dbr:Immune_response dbr:Flagellin dbr:Phosphorylation dbr:Putative dbr:ILK1 dbr:Cell_surface_membrane dbr:File:HAK5.jpg |
| dbp:wikiPageUsesTemplate | dbt:Reflist |
| dct:subject | dbc:Transport_proteins |
| rdfs:comment | High Affinity K+ transporter HAK5 is a transport protein found on the cell surface membrane of plants under conditions of potassium deprivation. It is believed to act as a symporter for protons and the potassium ion, K+. Firstly discovered in barley, receiving the name of HvHAK1, it was soon after identified in the model plant Arabidopsis thaliana and named HAK5. These transporters belongs to the subgroup I of the KT-HAK-KUP family of plant proteins with obvious homology with both bacterial and fungal transport systems, which experienced a major diversification following land conquest. KT-HAK-KUP transporters are one of four different types of K+ transporter within the cell, but are unique as they do not have a putative pore forming domain like the other three; Shaker channels, KCO channel (en) |
| rdfs:label | High Affinity K+ transporter HAK5 (en) |
| owl:sameAs | wikidata:High Affinity K+ transporter HAK5 https://global.dbpedia.org/id/4Y6bT |
| prov:wasDerivedFrom | wikipedia-en:High_Affinity_K+_transporter_HAK5?oldid=1041739205&ns=0 |
| foaf:depiction | wiki-commons:Special:FilePath/HAK5.jpg wiki-commons:Special:FilePath/HAK5_Protein_sequence.jpg |
| foaf:isPrimaryTopicOf | wikipedia-en:High_Affinity_K+_transporter_HAK5 |
| is dbo:wikiPageRedirects of | dbr:HAK5 |
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| is foaf:primaryTopic of | wikipedia-en:High_Affinity_K+_transporter_HAK5 |
