ArticleBiophysical journal2021
Allosteric signaling in C-linker and cyclic nucleotide-binding domain of HCN2 channels.
Article in Biophysical journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 20 citations in OpenAlex.
- An inter-subunit path is required for entropically-driven and negatively cooperative binding of cyclic nucleotides in the HCN2 channel.Communications biology · 2026Article
- Article
- Ligand-Coupled Conformational Changes in a Cyclic Nucleotide-Gated Ion Channel Revealed by Time-Resolved Transition Metal Ion FRET.bioRxiv : the preprint server for biology · 2024Article
- A high affinity switch for cAMP in the HCN pacemaker channels.Nature communications · 2024Article
- Combining structural and coevolution information to unveil allosteric sites.Chemical science · 2023Article
- Conformational changes in protein kinase A along its activation cycle are rooted in the folding energetics of cyclic-nucleotide binding domains.The Journal of biological chemistry · 2023Article
- Regulatory Molecules of Synaptic Plasticity in Anxiety Disorder.International journal of general medicine · 2023Review
- Subunit promotion energies for channel opening in heterotetrameric olfactory CNG channels.PLoS computational biology · 2022Article
- Uncoupling of Voltage- and Ligand-Induced Activation in HCN2 Channels by Glycine Inserts.Frontiers in physiology · 2022Article
Corrections and comments
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Authors and funding
7 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Opening of hyperpolarization-activated cyclic nucleotide-modulated (HCN) channels is controlled by membrane hyperpolarization and binding of cyclic nucleotides to the tetrameric cyclic nucleotide-binding domain (CNBD), attached to the C-linker (CL) disk. Confocal patch-clamp fluorometry revealed pronounced cooperativity of ligand binding among protomers. However, by which pathways allosteric signal transmission occurs remained elusive. Here, we investigate how changes in the structural dynamics of the CL-CNBD of mouse HCN2 upon cAMP binding relate to inter- and intrasubunit signal transmission. Applying a rigidity-theory-based approach, we identify two intersubunit and one intrasubunit pathways that differ in allosteric coupling strength between cAMP-binding sites or toward the CL. These predictions agree with results from electrophysiological and patch-clamp fluorometry experiments. Our results map out distinct routes within the CL-CNBD that modulate different cAMP-binding responses in HCN2 channels. They signify that functionally relevant submodules may exist within and across structurally discernable subunits in HCN channels.
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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.