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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-7298 | |||||||||
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Title | 4.1 angstrom Mg2+-unbound structure of mouse TRPM7 | |||||||||
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![]() | CryoEM / Truncated mouse TRPM7 / MEMBRANE PROTEIN | |||||||||
Function / homology | ![]() intracellular magnesium ion homeostasis / calcium-dependent cell-matrix adhesion / monoatomic cation homeostasis / varicosity / TRP channels / actomyosin structure organization / myosin binding / monoatomic cation transmembrane transport / necroptotic process / monoatomic cation channel activity ...intracellular magnesium ion homeostasis / calcium-dependent cell-matrix adhesion / monoatomic cation homeostasis / varicosity / TRP channels / actomyosin structure organization / myosin binding / monoatomic cation transmembrane transport / necroptotic process / monoatomic cation channel activity / ruffle / protein tetramerization / calcium channel activity / memory / synaptic vesicle membrane / calcium ion transport / kinase activity / actin binding / non-specific serine/threonine protein kinase / protein kinase activity / positive regulation of apoptotic process / protein serine kinase activity / protein serine/threonine kinase activity / neuronal cell body / ATP binding / metal ion binding / plasma membrane Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.1 Å | |||||||||
![]() | Zhang J / Li Z | |||||||||
![]() | ![]() Title: Structure of the mammalian TRPM7, a magnesium channel required during embryonic development. Authors: Jingjing Duan / Zongli Li / Jian Li / Raymond E Hulse / Ana Santa-Cruz / William C Valinsky / Sunday A Abiria / Grigory Krapivinsky / Jin Zhang / David E Clapham / ![]() ![]() Abstract: The transient receptor potential ion channel subfamily M, member 7 (TRPM7), is a ubiquitously expressed protein that is required for mouse embryonic development. TRPM7 contains both an ion channel ...The transient receptor potential ion channel subfamily M, member 7 (TRPM7), is a ubiquitously expressed protein that is required for mouse embryonic development. TRPM7 contains both an ion channel and an α-kinase. The channel domain comprises a nonselective cation channel with notable permeability to Mg and Zn Here, we report the closed state structures of the mouse TRPM7 channel domain in three different ionic conditions to overall resolutions of 3.3, 3.7, and 4.1 Å. The structures reveal key residues for an ion binding site in the selectivity filter, with proposed partially hydrated Mg ions occupying the center of the conduction pore. In high [Mg], a prominent external disulfide bond is found in the pore helix, which is essential for ion channel function. Our results provide a structural framework for understanding the TRPM1/3/6/7 subfamily and extend the knowledge base upon which to study the diversity and evolution of TRP channels. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 5.7 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 10.1 KB 10.1 KB | Display Display | ![]() |
Images | ![]() | 169.8 KB | ||
Filedesc metadata | ![]() | 5.3 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6bwfMC ![]() 6975C ![]() 7297C ![]() 5zx5C ![]() 6bwdC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Map
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Voxel size | X=Y=Z: 1.23 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Membrane Protein, Transient Receptor Potential ion channel
Entire | Name: Membrane Protein, Transient Receptor Potential ion channel |
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Components |
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-Supramolecule #1: Membrane Protein, Transient Receptor Potential ion channel
Supramolecule | Name: Membrane Protein, Transient Receptor Potential ion channel type: cell / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: TRPM7
Macromolecule | Name: TRPM7 / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 107.475609 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) ...String: (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)KFL TIPRLEELYN TKQGPTNPML FHLIRDVKQG NLPPGYK IT LIDIGLVIEY LMGGTYRCTY TRKRFRLIYN SLGGNNRRSG RNTSSSTPQL RKSHETFGNR ADKKEKMRHN HFIKTAQP Y RPKMDASMEE GKKKRTKDEI VDIDDPETKR FPYPLNELLI WACLMKRQVM ARFLWQHGEE SMAKALVACK IYRSMAYEA KQSDLVDDTS EELKQYSNDF GQLAVELLEQ SFRQDETMAM KLLTYELKNW SNSTCLKLAV SSRLRPFVAH TCTQMLLSDM WMGRLNMRK NSWYKVILSI LVPPAILMLE YKTKAEMSHI PQSQDAHQMT MEDSENNFHN ITEEIPMEVF KEVKILDSSD G KNEMEIHI KSKKLPITRK FYAFYHAPIV KFWFNTLAYL GFLMLYTFVV LVKMEQLPSV QEWIVIAYIF TYAIEKVREV FM SEAGKIS QKIKVWFSDY FNVSDTIAII SFFVGFGLRF GAKWNYINAY DNHVFVAGRL IYCLNIIFWY VRLLDFLAVN QQA GPYVMM IGKMVANMFY IVVIMALVLL SFGVPRKAIL YPHEEPSWSL AKDIVFHPYW MIFGEVYAYE IDVCANDSTL PTIC GPGTW LTPFLQAVYL FVQYIIMVNL LIAFFNNVYL QVKAISNIVW KYQRYHFIMA YHEKPVLPPP LIILSHIVSL FCCVC KRRK KDKTSDGPKL FLTEEDQKKL HDFEEQCVEM YFDEKDDKFN SGSEERIRVT FERVEQMSIQ IKEVGDRVNY IKRSLQ SLD SQIGHLQDLS ALTVDTLKTL TAQKASEASK VHNEITRELS ISKHLAQNLI DDVPVRPLWK KPSAVNTLSS S |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE / Instrument: FEI VITROBOT MARK I |
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Electron microscopy
Microscope | FEI POLARA 300 |
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Image recording | Film or detector model: GATAN K2 BASE (4k x 4k) / Average electron dose: 56.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: EMDB MAP |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 4.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 206032 |
Initial angle assignment | Type: PROJECTION MATCHING |
Final angle assignment | Type: RANDOM ASSIGNMENT |