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- PDB-7l2t: cryo-EM structure of DkTx-bound minimal TRPV1 in partial open state -

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Basic information

Entry
Database: PDB / ID: 7l2t
Titlecryo-EM structure of DkTx-bound minimal TRPV1 in partial open state
Components
  • Tau-theraphotoxin-Hs1a
  • Transient receptor potential cation channel subfamily V member 1
KeywordsTRANSPORT PROTEIN / TRP channel / cryo-EM / nanodisc / toxin
Function / homology
Function and homology information


temperature-gated ion channel activity / response to capsazepine / negative regulation of establishment of blood-brain barrier / sensory perception of mechanical stimulus / peptide secretion / urinary bladder smooth muscle contraction / detection of chemical stimulus involved in sensory perception of pain / smooth muscle contraction involved in micturition / TRP channels / cellular response to temperature stimulus ...temperature-gated ion channel activity / response to capsazepine / negative regulation of establishment of blood-brain barrier / sensory perception of mechanical stimulus / peptide secretion / urinary bladder smooth muscle contraction / detection of chemical stimulus involved in sensory perception of pain / smooth muscle contraction involved in micturition / TRP channels / cellular response to temperature stimulus / cellular response to acidic pH / fever generation / detection of temperature stimulus involved in thermoception / thermoception / ion channel regulator activity / negative regulation of systemic arterial blood pressure / glutamate secretion / chloride channel regulator activity / response to pH / dendritic spine membrane / monoatomic cation transmembrane transporter activity / excitatory extracellular ligand-gated monoatomic ion channel activity / negative regulation of heart rate / cellular response to ATP / temperature homeostasis / response to pain / cellular response to alkaloid / calcium ion import across plasma membrane / behavioral response to pain / diet induced thermogenesis / cellular response to cytokine stimulus / detection of temperature stimulus involved in sensory perception of pain / intracellularly gated calcium channel activity / negative regulation of mitochondrial membrane potential / ligand-gated monoatomic ion channel activity / extracellular ligand-gated monoatomic ion channel activity / monoatomic cation channel activity / GABA-ergic synapse / sensory perception of pain / phosphatidylinositol binding / cellular response to nerve growth factor stimulus / phosphoprotein binding / calcium ion transmembrane transport / microglial cell activation / calcium channel activity / lipid metabolic process / cellular response to growth factor stimulus / response to peptide hormone / calcium ion transport / positive regulation of nitric oxide biosynthetic process / transmembrane signaling receptor activity / cellular response to tumor necrosis factor / cellular response to heat / positive regulation of cytosolic calcium ion concentration / response to heat / monoatomic ion transmembrane transport / toxin activity / postsynaptic membrane / protein homotetramerization / calmodulin binding / neuron projection / positive regulation of apoptotic process / external side of plasma membrane / neuronal cell body / lipid binding / dendrite / negative regulation of transcription by RNA polymerase II / extracellular region / ATP binding / identical protein binding / membrane / metal ion binding / plasma membrane
Similarity search - Function
Transient receptor potential cation channel subfamily V member 1-4 / Transient receptor potential cation channel subfamily V / Ankyrin repeat / Ankyrin repeats (3 copies) / Ankyrin repeat profile. / Ankyrin repeat region circular profile. / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily / Ion transport domain / Ion transport protein
Similarity search - Domain/homology
Chem-65I / Chem-XJ7 / Transient receptor potential cation channel subfamily V member 1 / Tau-theraphotoxin-Hs1a
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
Cyriopagopus schmidti (Chinese earth tiger)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.08 Å
AuthorsZhang, K. / Julius, D. / Cheng, Y.
Funding support France, United States, 5items
OrganizationGrant numberCountry
Human Frontier Science Program (HFSP)LT000471/2017-L France
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01 GM098672 United States
National Institutes of Health/Office of the DirectorS10 OD021741 United States
National Institutes of Health/Office of the DirectorS10 OD020054 United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)R35 NS105038 United States
CitationJournal: Cell / Year: 2021
Title: Structural snapshots of TRPV1 reveal mechanism of polymodal functionality.
Authors: Kaihua Zhang / David Julius / Yifan Cheng /
Abstract: Many transient receptor potential (TRP) channels respond to diverse stimuli and conditionally conduct small and large cations. Such functional plasticity is presumably enabled by a uniquely dynamic ...Many transient receptor potential (TRP) channels respond to diverse stimuli and conditionally conduct small and large cations. Such functional plasticity is presumably enabled by a uniquely dynamic ion selectivity filter that is regulated by physiological agents. What is currently missing is a "photo series" of intermediate structural states that directly address this hypothesis and reveal specific mechanisms behind such dynamic channel regulation. Here, we exploit cryoelectron microscopy (cryo-EM) to visualize conformational transitions of the capsaicin receptor, TRPV1, as a model to understand how dynamic transitions of the selectivity filter in response to algogenic agents, including protons, vanilloid agonists, and peptide toxins, permit permeation by small and large organic cations. These structures also reveal mechanisms governing ligand binding substates, as well as allosteric coupling between key sites that are proximal to the selectivity filter and cytoplasmic gate. These insights suggest a general framework for understanding how TRP channels function as polymodal signal integrators.
History
DepositionDec 17, 2020Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 22, 2021Provider: repository / Type: Initial release
Revision 1.1Oct 13, 2021Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last

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Structure visualization

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  • EMDB-23140
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Assembly

Deposited unit
A: Transient receptor potential cation channel subfamily V member 1
F: Tau-theraphotoxin-Hs1a
E: Tau-theraphotoxin-Hs1a
B: Transient receptor potential cation channel subfamily V member 1
C: Transient receptor potential cation channel subfamily V member 1
D: Transient receptor potential cation channel subfamily V member 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)313,78615
Polymers309,4346
Non-polymers4,3529
Water724
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 2 types, 6 molecules ABCDFE

#1: Protein
Transient receptor potential cation channel subfamily V member 1 / TrpV1 / Capsaicin receptor / Osm-9-like TRP channel 1 / OTRPC1 / Vanilloid receptor 1 / Vanilloid ...TrpV1 / Capsaicin receptor / Osm-9-like TRP channel 1 / OTRPC1 / Vanilloid receptor 1 / Vanilloid receptor type 1-like


Mass: 73016.352 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Trpv1, Vr1, Vr1l / Production host: Homo sapiens (human) / References: UniProt: O35433
#2: Protein Tau-theraphotoxin-Hs1a / Tau-TRTX-Hs1a / Double-knot toxin / DkTx


Mass: 8684.185 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Cyriopagopus schmidti (Chinese earth tiger)
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: P0CH43

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Non-polymers , 4 types, 13 molecules

#3: Chemical
ChemComp-XJ7 / (2S)-1-(butanoyloxy)-3-{[(R)-hydroxy{[(1r,2R,3S,4S,5R,6S)-2,3,4,5,6-pentahydroxycyclohexyl]oxy}phosphoryl]oxy}propan-2-yl tridecanoate


Mass: 600.633 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C26H49O13P / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Na
#5: Chemical
ChemComp-65I / (9R,12R)-15-amino-12-hydroxy-6,12-dioxo-7,11,13-trioxa-12lambda~5~-phosphapentadecan-9-yl undecanoate


Mass: 481.560 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C22H44NO8P / Feature type: SUBJECT OF INVESTIGATION
#6: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY

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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: minimal TRPV1 in nanodisc / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Rattus norvegicus (Norway rat)10116
31Cyriopagopus schmidti (Chinese earth tiger)29017
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
21Homo sapiens (human)9606
31Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)866768
Buffer solutionpH: 7.4
SpecimenEmbedding applied: YES / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
EM embeddingMaterial: nanodisc
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 67 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: NONE
3D reconstructionResolution: 3.08 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 235666 / Symmetry type: POINT

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