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- PDB-6gyn: Structure of human HCN4 hyperpolarization-activated cyclic nucleo... -

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Basic information

Entry
Database: PDB / ID: 6gyn
TitleStructure of human HCN4 hyperpolarization-activated cyclic nucleotide-gated ion channel
ComponentsPotassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4
KeywordsMEMBRANE PROTEIN / ION CHANNEL / PACEMAKER CURRENT / Structural Genomics / Structural Genomics Consortium / SGC
Function / homology
Function and homology information


voltage-gated potassium channel activity involved in SA node cell action potential depolarization / regulation of cardiac muscle cell action potential involved in regulation of contraction / HCN channel complex / membrane depolarization during SA node cell action potential / SA node cell action potential / intracellular cAMP-activated cation channel activity / membrane depolarization during cardiac muscle cell action potential / sodium ion import across plasma membrane / cellular response to cGMP / voltage-gated sodium channel activity ...voltage-gated potassium channel activity involved in SA node cell action potential depolarization / regulation of cardiac muscle cell action potential involved in regulation of contraction / HCN channel complex / membrane depolarization during SA node cell action potential / SA node cell action potential / intracellular cAMP-activated cation channel activity / membrane depolarization during cardiac muscle cell action potential / sodium ion import across plasma membrane / cellular response to cGMP / voltage-gated sodium channel activity / blood circulation / regulation of heart rate by cardiac conduction / potassium ion import across plasma membrane / sodium ion transmembrane transport / intrinsic component of plasma membrane / cation transport / potassium ion transmembrane transport / voltage-gated potassium channel activity / regulation of ion transmembrane transport / regulation of cardiac muscle contraction / cAMP binding / regulation of heart rate / regulation of membrane potential / cellular response to cAMP / muscle contraction / regulation of membrane depolarization / perinuclear region of cytoplasm / identical protein binding / plasma membrane
Ion transport protein N-terminal / Ion transport protein / Cyclic nucleotide-binding domain / Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4 / Voltage-dependent channel domain superfamily / Cyclic nucleotide-binding-like / Cyclic nucleotide-binding, conserved site / RmlC-like jelly roll fold / Ion transport N-terminal / Ion transport domain ...Ion transport protein N-terminal / Ion transport protein / Cyclic nucleotide-binding domain / Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4 / Voltage-dependent channel domain superfamily / Cyclic nucleotide-binding-like / Cyclic nucleotide-binding, conserved site / RmlC-like jelly roll fold / Ion transport N-terminal / Ion transport domain / Potassium channel, voltage-dependent, EAG/ELK/ERG / Cyclic nucleotide-binding domain
Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsShintre, C.A. / Pike, A.C.W. / Tessitore, A. / Young, M. / Bushell, S.R. / Strain-Damerell, C. / Mukhopadhyay, S. / Burgess-Brown, N.A. / Huiskonen, J.T. / Arrowsmith, C.H. / Edwards, A.M. / Bountra, C. / Carpenter, E.P. / Structural Genomics Consortium (SGC)
Funding support United Kingdom, 2items
OrganizationGrant numberCountry
Wellcome Trust106169/Z/14/Z United Kingdom
European CommissionIMI 115766 United Kingdom
CitationJournal: To Be Published
Title: Structure of human HCN4 hyperpolarization-activated cyclic nucleotide-gated ion channel
Authors: Shintre, C.A. / Pike, A.C.W. / Tessitore, A. / Young, M. / Bushell, S.R. / Strain-Damerell, C. / Mukhopadhyay, S. / Burgess-Brown, N.A. / Huiskonen, J.T. / Arrowsmith, C.H. / Edwards, A.M. / ...Authors: Shintre, C.A. / Pike, A.C.W. / Tessitore, A. / Young, M. / Bushell, S.R. / Strain-Damerell, C. / Mukhopadhyay, S. / Burgess-Brown, N.A. / Huiskonen, J.T. / Arrowsmith, C.H. / Edwards, A.M. / Bountra, C. / Carpenter, E.P.
Validation Report
SummaryFull reportAbout validation report
History
DepositionJun 30, 2018Deposition site: PDBE / Processing site: PDBE
Revision 1.0May 8, 2019Provider: repository / Type: Initial release
Revision 1.1Dec 11, 2019Group: Other / Category: atom_sites
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3]

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Assembly

Deposited unit
A: Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4
B: Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4
C: Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4
D: Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4
hetero molecules


Theoretical massNumber of molelcules
Total (without water)271,45640
Polymers243,3474
Non-polymers28,10936
Water0
1


TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area54070 Å2
ΔGint-416 kcal/mol
Surface area87250 Å2
MethodPISA

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Components

#1: Protein
Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4


Mass: 60836.754 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: HCN4 / Plasmid: pFB-LIC-Bse / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q9Y3Q4
#2: Chemical...
ChemComp-PC1 / 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE / 3-SN-PHOSPHATIDYLCHOLINE / Phosphatidylcholine


Mass: 790.145 Da / Num. of mol.: 28 / Source method: obtained synthetically / Formula: C44H88NO8P / Comment: phospholipid*YM
#3: Chemical
ChemComp-3PE / 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE / 3-SN-PHOSPHATIDYLETHANOLAMINE / Phosphatidylethanolamine


Mass: 748.065 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C41H82NO8P / Comment: phospholipid*YM

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Potassium/Sodium hyperpolarization-activated cyclic nucleotide-gated ion channel 4
Type: ORGANELLE OR CELLULAR COMPONENT / Entity ID: 1 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.5
Buffer component
IDConc.NameFormulaBuffer-ID
120 mMHEPES1
2150 mMSodium chlorideNaClSodium chloride1
30.02 %DDM1
40.002 %Cholesteryl hemisuccinate1
SpecimenConc.: 5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 278 K / Details: blotted for 5.5s before plunge

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS / Details: EBIC TITAN KRIOS M02
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 37313 X / Nominal defocus max: 2500 nm / Nominal defocus min: 1300 nm
Specimen holderCryogen: NITROGEN / Model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 12 sec. / Electron dose: 48.7 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 1294
Image scansMovie frames/image: 48 / Used frames/image: 1-48

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Processing

SoftwareName: PHENIX / Version: 1.13_2998: / Classification: refinement
EM software
IDNameVersionCategory
1Gautomatch0.53particle selection
2EPUimage acquisition
4CTFFIND4.1.5CTF correction
7Coot0.8.9.1model fitting
9PHENIX1.13model refinement
10RELION2.1-beta-0initial Euler assignment
11RELION2.1-beta-0final Euler assignment
12RELION2.1-beta-0classification
13cryoSPARC0.6.53D reconstruction
Image processingDetails: Images were motioncorrected and dose-weighted with MOTIONCOR2
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 157681
Details: Picking with templates derived from manually picked particles
SymmetryPoint symmetry: C4 (4 fold cyclic)
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 25764 / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: AB INITIO MODEL / Space: REAL
Details: Model refined against the cryosparc b-factor sharpened map using default restraints

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