ArticlePloS one2015
Outward Rectification of Voltage-Gated K+ Channels Evolved at Least Twice in Life History.
Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 14 citations in OpenAlex.
- Principles of signal integration in combinatorial stress acclimatization.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025Review
- HvAKT2 and HvHAK1 confer drought tolerance in barley through enhanced leaf mesophyll HPlant biotechnology journal · 2020Article
- Mechanisms of Plant Responses and Adaptation to Soil Salinity.Innovation (Cambridge (Mass.)) · 2020Review
- Evolution and Structural Characteristics of Plant Voltage-Gated KThe Plant cell · 2018Review
- A thermodynamic description for physiological transmembrane transport.F1000Research · 2018Article
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Authors and funding
3 authors at 2 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Voltage-gated potassium (K+) channels are present in all living systems. Despite high structural similarities in the transmembrane domains (TMD), this K+ channel type segregates into at least two main functional categories-hyperpolarization-activated, inward-rectifying (Kin) and depolarization-activated, outward-rectifying (Kout) channels. Voltage-gated K+ channels sense the membrane voltage via a voltage-sensing domain that is connected to the conduction pathway of the channel. It has been shown that the voltage-sensing mechanism is the same in Kin and Kout channels, but its performance results in opposite pore conformations. It is not known how the different coupling of voltage-sensor and pore is implemented. Here, we studied sequence and structural data of voltage-gated K+ channels from animals and plants with emphasis on the property of opposite rectification. We identified structural hotspots that alone allow already the distinction between Kin and Kout channels. Among them is a loop between TMD S5 and the pore that is very short in animal Kout, longer in plant and animal Kin and the longest in plant Kout channels. In combination with further structural and phylogenetic analyses this finding suggests that outward-rectification evolved twice and independently in the animal and plant kingdom.
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