Proteins
Curated comments from UniProt
Type | Comment | Proteins |
---|---|---|
KEA1_ARATH | function | Electroneutral K(+)/H(+) efflux antiporter involved in chloroplastic K(+) homeostasis and osmotic adjustment, especially during plastid division and thylakoid membrane formation (PubMed:24278440, PubMed:27443603, PubMed:31296940, PubMed:33111995). Collaboratively with KEA2, adjusts alkaline stromal pH upon light to dark transitions in plastids (PubMed:33111995). Together with KEA2, critical for chloroplast development, including chloroplast RNA-metabolism (e.g. rRNA maturation, polysome loading and RNA-protein interactions) and plastid gene expression (PGE), ion homeostasis, and photosynthesis (PubMed:27443603, PubMed:34235544). Contributes, during early seedling development, to the regulation of photosynthesis and abscisic acid- (ABA-) mediated primary root growth in a sucrose-dependent manner (PubMed:35193734). Involved in the regulation of reactive oxygen and nitrogen species (ROS and RNS) metabolism (PubMed:33485149). Required in roots for rapid hyperosmotic-induced Ca(2+) responses and for osmo-sensory potentiation in hyperosmotic conditions (PubMed:27528686). May counteract resilience to drought and salt stress, involving photorespiratory pathway and stomata closure (PubMed:33485149, PubMed:34235544). |
KEA1_ARATH | similarity | Belongs to the monovalent cation:proton antiporter 2 (CPA2) transporter (TC 2.A.37) family. KEA (TC 2.A.37.1) subfamily. |
KEA1_ARATH | subcellular location | Specifically localized to the two caps of the dividing organelle separated by the fission plane (at protein level). |
KEA1_ARATH | tissue specificity | Expressed in shoots and roots (PubMed:24278440). Mainly localized to leaf veins, hypocotyls, mesophylls and guard cells (PubMed:35193734). Accumulates at high levels in small and dividing plastids (at protein level) (PubMed:27443603). |
Function
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