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- PDB-7vq2: Structure of Apo-hsTRPM2 channel TM domain -

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Basic information

Entry
Database: PDB / ID: 7vq2
TitleStructure of Apo-hsTRPM2 channel TM domain
ComponentsTransient receptor potential cation channel subfamily M member 2
KeywordsTRANSPORT PROTEIN / channel / trpm2 / Selectivity Filter / TM domain
Function / homology
Function and homology information


cellular response to purine-containing compound / response to purine-containing compound / mono-ADP-D-ribose binding / manganese ion transmembrane transporter activity / zinc ion transmembrane transport / ligand-gated calcium channel activity / dendritic cell differentiation / cellular response to temperature stimulus / regulation of filopodium assembly / sodium channel activity ...cellular response to purine-containing compound / response to purine-containing compound / mono-ADP-D-ribose binding / manganese ion transmembrane transporter activity / zinc ion transmembrane transport / ligand-gated calcium channel activity / dendritic cell differentiation / cellular response to temperature stimulus / regulation of filopodium assembly / sodium channel activity / calcium ion transmembrane import into cytosol / TRP channels / estrous cycle / regulation of actin cytoskeleton reorganization / response to hydroperoxide / dendritic cell chemotaxis / positive regulation of oxidative stress-induced neuron death / cation transmembrane transport / temperature homeostasis / calcium-release channel activity / calcium ion import across plasma membrane / ficolin-1-rich granule membrane / tertiary granule membrane / calcium-mediated signaling using intracellular calcium source / release of sequestered calcium ion into cytosol / positive regulation of insulin secretion / specific granule membrane / cation channel activity / cellular response to calcium ion / calcium ion transmembrane transport / calcium channel activity / calcium ion transport / cytoplasmic vesicle membrane / cellular response to hydrogen peroxide / perikaryon / response to heat / lysosomal membrane / protein homotetramerization / lysosome / neuron projection / Neutrophil degranulation / calcium ion binding / integral component of plasma membrane / plasma membrane
Similarity search - Function
Transient receptor potential cation channel subfamily M member 2 / TRPM, SLOG domain / SLOG in TRPM / NUDIX hydrolase domain / Nudix hydrolase domain profile. / 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: 3.68 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

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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)163,8704
Polymers163,8704
Non-polymers00
Water0
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: 40967.398 Da / Num. of mol.: 4 / Fragment: TM domain
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 FIELDBright-field microscopy
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.68 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 68530 / Symmetry type: POINT

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