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- PDB-7vq1: Structure of Apo-hsTRPM2 channel -

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Basic information

Entry
Database: PDB / ID: 7vq1
TitleStructure of Apo-hsTRPM2 channel
ComponentsTransient receptor potential cation channel subfamily M member 2
KeywordsTRANSPORT PROTEIN / channel / trpm2 / Selectivity Filter
Function / homology
Function and homology information


cellular response to purine-containing compound / mono-ADP-D-ribose binding / manganese ion transmembrane transporter activity / zinc ion transmembrane transport / dendritic cell differentiation / response to purine-containing compound / regulation of filopodium assembly / ligand-gated calcium channel activity / cellular response to temperature stimulus / TRP channels ...cellular response to purine-containing compound / mono-ADP-D-ribose binding / manganese ion transmembrane transporter activity / zinc ion transmembrane transport / dendritic cell differentiation / response to purine-containing compound / regulation of filopodium assembly / ligand-gated calcium channel activity / cellular response to temperature stimulus / TRP channels / dendritic cell chemotaxis / sodium channel activity / calcium ion transmembrane import into cytosol / response to hydroperoxide / temperature homeostasis / calcium ion import across plasma membrane / intracellularly gated calcium channel activity / tertiary granule membrane / ficolin-1-rich granule membrane / specific granule membrane / monoatomic cation channel activity / release of sequestered calcium ion into cytosol / cellular response to calcium ion / cell projection / regulation of actin cytoskeleton organization / calcium ion transmembrane transport / cytoplasmic vesicle membrane / calcium channel activity / cellular response to hydrogen peroxide / calcium ion transport / response to heat / perikaryon / protein homotetramerization / lysosome / lysosomal membrane / calcium ion binding / Neutrophil degranulation / plasma membrane
Similarity search - Function
TRPM, SLOG domain / : / SLOG in TRPM / Nudix hydrolase domain profile. / NUDIX hydrolase domain / NUDIX hydrolase-like domain superfamily / Ion transport domain / Ion transport protein
Similarity search - Domain/homology
Transient receptor potential cation channel subfamily M member 2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.76 Å
AuthorsYu, X.F. / Xie, Y. / Zhang, X.K. / Ma, C. / Guo, J.T. / Yang, F. / Yang, W.
Funding support China, 2items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31872796 China
National Natural Science Foundation of China (NSFC)81371302 China
CitationJournal: Cell Rep / Year: 2021
Title: Structural and functional basis of the selectivity filter as a gate in human TRPM2 channel.
Authors: Xiafei Yu / Yuan Xie / Xiaokang Zhang / Cheng Ma / Likun Liu / Wenxuan Zhen / Lingyi Xu / Jianmin Zhang / Yan Liang / Lixia Zhao / Xiuxia Gao / Peilin Yu / Jianhong Luo / Lin-Hua Jiang / Yan ...Authors: Xiafei Yu / Yuan Xie / Xiaokang Zhang / Cheng Ma / Likun Liu / Wenxuan Zhen / Lingyi Xu / Jianmin Zhang / Yan Liang / Lixia Zhao / Xiuxia Gao / Peilin Yu / Jianhong Luo / Lin-Hua Jiang / Yan Nie / Fan Yang / Jiangtao Guo / Wei Yang /
Abstract: Transient receptor potential melastatin 2 (TRPM2), a Ca-permeable cation channel, is gated by intracellular adenosine diphosphate ribose (ADPR), Ca, warm temperature, and oxidative stress. It is ...Transient receptor potential melastatin 2 (TRPM2), a Ca-permeable cation channel, is gated by intracellular adenosine diphosphate ribose (ADPR), Ca, warm temperature, and oxidative stress. It is critically involved in physiological and pathological processes ranging from inflammation to stroke to neurodegeneration. At present, the channel's gating and ion permeation mechanisms, such as the location and identity of the selectivity filter, remain ambiguous. Here, we report the cryo-electron microscopy (cryo-EM) structure of human TRPM2 in nanodisc in the ligand-free state. Cryo-EM map-guided computational modeling and patch-clamp recording further identify a quadruple-residue motif as the ion selectivity filter, which adopts a restrictive conformation in the closed state and acts as a gate, profoundly contrasting with its widely open conformation in the Nematostella vectensis TRPM2. Our study reveals the gating of human TRPM2 by the filter and demonstrates the feasibility of using cryo-EM in conjunction with computational modeling and functional studies to garner structural information for intrinsically dynamic but functionally important domains.
History
DepositionOct 18, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 22, 2021Provider: repository / Type: Initial release
Revision 1.1Jun 19, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Assembly

Deposited unit
A: Transient receptor potential cation channel subfamily M member 2
B: Transient receptor potential cation channel subfamily M member 2
C: Transient receptor potential cation channel subfamily M member 2
D: Transient receptor potential cation channel subfamily M member 2


Theoretical massNumber of molelcules
Total (without water)685,6654
Polymers685,6654
Non-polymers00
Water00
1


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

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Components

#1: Protein
Transient receptor potential cation channel subfamily M member 2 / Estrogen-responsive element-associated gene 1 protein / Long transient receptor potential channel 2 ...Estrogen-responsive element-associated gene 1 protein / Long transient receptor potential channel 2 / LTrpC-2 / LTrpC2 / Transient receptor potential channel 7 / TrpC7 / Transient receptor potential melastatin 2


Mass: 171416.188 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TRPM2, EREG1, KNP3, LTRPC2, TRPC7 / Production host: Homo sapiens (human) / References: UniProt: O94759

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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: TRPM2 / Type: CELL / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
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: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.15.2_3472: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.76 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 68530 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0138700
ELECTRON MICROSCOPYf_angle_d0.84552912
ELECTRON MICROSCOPYf_dihedral_angle_d13.02222788
ELECTRON MICROSCOPYf_chiral_restr0.0466208
ELECTRON MICROSCOPYf_plane_restr0.0056784

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