ArticleProceedings of the National Academy of Sciences of the United States of America2013
Dynamic PIP2 interactions with voltage sensor elements contribute to KCNQ2 channel gating.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
51 citing papers in PubMed, 83 citations in OpenAlex.
- The SIMDA framework maps PIP2-binding sites regulating the KCNQ1 channel.Nature communications · 2026Article
- Molecular dynamics of the pathogenic KCNQ2 variant G256W reveal mechanisms of channel dysfunction in epileptic encephalopathy.bioRxiv : the preprint server for biology · 2025Article
- Secondary structure transitions and dual PIP2 binding define cardiac KCNQ1-KCNE1 channel gating.Cell research · 2025Article
- Physiological roles of phosphoinositides and inositol phosphates: Implications for metabolic dysfunction-associated steatotic liver disease.Clinical science (London, England : 1979) · 2025Review
- A case of early epileptic encephalopathy caused by new mutation at W218C inBiochemistry and biophysics reports · 2025Article
- Phosphatidylinositol 4,5-bisphosphate activation mechanism of human KCNQ5.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- The Influence of Phosphoinositide Lipids in the Molecular Biology of Membrane Proteins: Recent Insights from Simulations.Journal of molecular biology · 2025Review
- Donepezil as a new therapeutic potential in KCNQ2- and KCNQ3-related autism.Frontiers in cellular neuroscience · 2024Article
- Functional Characterization of Two Variants at the Intron 6-Exon 7 Boundary of the KCNQ2 Potassium Channel Gene Causing Distinct Epileptic Phenotypes.Frontiers in pharmacology · 2022Article
- PIPCommunications biology · 2021Article
- From Bench to Biomolecular Simulation: Phospholipid Modulation of Potassium Channels.Journal of molecular biology · 2021Review
- Ethanol inhibits Kv7.2/7.3 channel open probability by reducing the PI(4,5)P2 sensitivity of Kv7.2 subunit.BMB reports · 2021Article
- Structural Mechanism of ω-Currents in a Mutated Kv7.2 Voltage Sensor Domain from Molecular Dynamics Simulations.Journal of chemical information and modeling · 2021Article
- Tracking Membrane Protein Dynamics in Real Time.The Journal of membrane biology · 2021Review
- The Molecular Basis for the Calcium-Dependent Slow Afterhyperpolarization in CA1 Hippocampal Pyramidal Neurons.Frontiers in physiology · 2021Review
- Molecular basis for ligand activation of the human KCNQ2 channel.Cell research · 2021Article
- Calmodulin acts as a state-dependent switch to control a cardiac potassium channel opening.Science advances · 2020Article
- Phosphatidylinositol(4,5)bisphosphate: diverse functions at the plasma membrane.Essays in biochemistry · 2020Review
- A PIPCommunications biology · 2020Article
- The membrane protein KCNQ1 potassium ion channel: Functional diversity and current structural insights.Biochimica et biophysica acta. Biomembranes · 2020Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 5 institutions in 3 countries.
Funding
Abstract
The S4 segment and the S4-S5 linker of voltage-gated potassium (Kv) channels are crucial for voltage sensing. Previous studies on the Shaker and Kv1.2 channels have shown that phosphatidylinositol-4,5-bisphosphate (PIP2) exerts opposing effects on Kv channels, up-regulating the current amplitude, while decreasing the voltage sensitivity. Interactions between PIP2 and the S4 segment or the S4-S5 linker in the closed state have been highlighted to explain the effects of PIP2 on voltage sensitivity. Here, we show that PIP2 preferentially interacts with the S4-S5 linker in the open-state KCNQ2 (Kv7.2) channel, whereas it contacts the S2-S3 loop in the closed state. These interactions are different from the PIP2-Shaker and PIP2-Kv1.2 interactions. Consistently, PIP2 exerts different effects on KCNQ2 relative to the Shaker and Kv1.2 channels; PIP2 up-regulates both the current amplitude and voltage sensitivity of the KCNQ2 channel. Disruption of the interaction of PIP2 with the S4-S5 linker by a single mutation decreases the voltage sensitivity and current amplitude, whereas disruption of the interaction with the S2-S3 loop does not alter voltage sensitivity. These results provide insight into the mechanism of PIP2 action on KCNQ channels. In the closed state, PIP2 is anchored at the S2-S3 loop; upon channel activation, PIP2 interacts with the S4-S5 linker and is involved in channel gating.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.