+Open data
-Basic information
Entry | Database: PDB / ID: 8inz | ||||||
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Title | Cryo-EM structure of human HCN3 channel in apo state | ||||||
Components | Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 3 | ||||||
Keywords | MEMBRANE PROTEIN / human HCN3 channel | ||||||
Function / homology | Function and homology information cone cell pedicle / HCN channels / HCN channel complex / regulation of membrane depolarization / cellular response to dopamine / voltage-gated sodium channel activity / voltage-gated potassium channel activity / sodium ion transmembrane transport / cAMP binding / potassium ion transmembrane transport ...cone cell pedicle / HCN channels / HCN channel complex / regulation of membrane depolarization / cellular response to dopamine / voltage-gated sodium channel activity / voltage-gated potassium channel activity / sodium ion transmembrane transport / cAMP binding / potassium ion transmembrane transport / regulation of membrane potential / axon / neuronal cell body / dendrite / plasma membrane Similarity search - Function | ||||||
Biological species | Homo sapiens (human) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.72 Å | ||||||
Authors | Yu, B. / Lu, Q.Y. / Li, J. / Zhang, J. | ||||||
Funding support | 1items
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Citation | Journal: J Biol Chem / Year: 2024 Title: Cryo-EM structure of human HCN3 channel and its regulation by cAMP. Authors: Bo Yu / Qiuyuan Lu / Jian Li / Xinyu Cheng / Han Hu / Yuanshuo Li / Tong Che / Yaoguang Hua / Haihai Jiang / Yuting Zhang / Cuiling Xian / Tingting Yang / Ying Fu / Yixiang Chen / Weiwei Nan ...Authors: Bo Yu / Qiuyuan Lu / Jian Li / Xinyu Cheng / Han Hu / Yuanshuo Li / Tong Che / Yaoguang Hua / Haihai Jiang / Yuting Zhang / Cuiling Xian / Tingting Yang / Ying Fu / Yixiang Chen / Weiwei Nan / Peter J McCormick / Bing Xiong / Jingjing Duan / Bo Zeng / Yanyan Li / Yang Fu / Jin Zhang / Abstract: HCN channels are important for regulating heart rhythm and nerve activity and have been studied as potential drug targets for treating depression, arrhythmia, nerve pain, and epilepsy. Despite ...HCN channels are important for regulating heart rhythm and nerve activity and have been studied as potential drug targets for treating depression, arrhythmia, nerve pain, and epilepsy. Despite possessing unique pharmacological properties, HCN channels share common characteristics in that they are activated by hyperpolarization and modulated by cAMP and other membrane lipids. However, the mechanisms of how these ligands bind and modulate HCN channels are unclear. In this study, we solved structures of full-length human HCN3 using cryo-EM and captured two different states, including a state without any ligand bound and a state with cAMP bound. Our structures reveal the novel binding sites for cholesteryl hemisuccinate in apo state and show how cholesteryl hemisuccinate and cAMP binding cause conformational changes in different states. These findings explain how these small modulators are sensed in mammals at the molecular level. The results of our study could help to design more potent and specific compounds to influence HCN channel activity and offer new therapeutic possibilities for diseases that lack effective treatment. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 8inz.cif.gz | 344.5 KB | Display | PDBx/mmCIF format |
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PDB format | pdb8inz.ent.gz | 273.9 KB | Display | PDB format |
PDBx/mmJSON format | 8inz.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/in/8inz ftp://data.pdbj.org/pub/pdb/validation_reports/in/8inz | HTTPS FTP |
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-Related structure data
Related structure data | 35602MC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
#1: Protein | Mass: 86142.922 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: HCN3 Production host: Mammalian expression vector BsrGI-MCS-pcDNA3.1 (others) References: UniProt: Q9P1Z3 #2: Chemical | ChemComp-VX9 / Mass: 492.774 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C31H56O4 / Feature type: SUBJECT OF INVESTIGATION Has ligand of interest | Y | |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 3 Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT |
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Source (natural) | Organism: Homo sapiens (human) |
Source (recombinant) | Organism: Mammalian expression vector BsrGI-MCS-pcDNA3.1 (others) |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 1800 nm |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
-Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
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3D reconstruction | Resolution: 2.72 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 71465 / Symmetry type: POINT | ||||||||||||||||||||||||
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