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- EMDB-40496: Cryo-EM structure of TRPM7 in MSP2N2 nanodisc in apo state -

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Basic information

Entry
Database: EMDB / ID: EMD-40496
TitleCryo-EM structure of TRPM7 in MSP2N2 nanodisc in apo state
Map dataCryo-EM structure of TRPM7 in MSP2N2 nanodisc in apo state
Sample
  • Complex: sample 1
    • Protein or peptide: Transient receptor potential cation channel subfamily M member 7
  • Ligand: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
  • Ligand: CHOLESTEROL
  • Ligand: 2-[2-[(1~{S},2~{S},4~{S},5'~{R},6~{R},7~{S},8~{R},9~{S},12~{S},13~{R},16~{S})-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.0^{2,9}.0^{4,8}.0^{13,18}]icos-18-ene-6,2'-oxane]-16-yl]oxyethyl]propane-1,3-diol
  • Ligand: SODIUM IONSodium
  • Ligand: water
Function / homology
Function and homology information


intracellular magnesium ion homeostasis / calcium-dependent cell-matrix adhesion / varicosity / TRP channels / actomyosin structure organization / myosin binding / monoatomic cation transmembrane transport / necroptotic process / monoatomic cation channel activity / ruffle ...intracellular magnesium ion homeostasis / calcium-dependent cell-matrix adhesion / 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 / actin binding / kinase activity / non-specific serine/threonine protein kinase / protein kinase activity / positive regulation of apoptotic process / phosphorylation / protein serine kinase activity / protein serine/threonine kinase activity / neuronal cell body / ATP binding / metal ion binding / plasma membrane
Similarity search - Function
Transient receptor potential cation channel subfamily M member 7 / MHCK/EF2 kinase / Alpha-kinase family / Alpha-type protein kinase domain profile. / Alpha-kinase family / TRPM, tetramerisation domain / TRPM, tetramerisation domain superfamily / Tetramerisation domain of TRPM / TRPM, SLOG domain / SLOG in TRPM ...Transient receptor potential cation channel subfamily M member 7 / MHCK/EF2 kinase / Alpha-kinase family / Alpha-type protein kinase domain profile. / Alpha-kinase family / TRPM, tetramerisation domain / TRPM, tetramerisation domain superfamily / Tetramerisation domain of TRPM / TRPM, SLOG domain / SLOG in TRPM / Ion transport domain / Ion transport protein / Protein kinase-like domain superfamily
Similarity search - Domain/homology
Transient receptor potential cation channel subfamily M member 7
Similarity search - Component
Biological speciesMus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.19 Å
AuthorsNadezhdin KD / Neuberger A / Sobolevsky AI
Funding support United States, Germany, 5 items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)R01 CA206573 United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)R01 NS083660 United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)R01 NS107253 United States
National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS)R01 AR078814 United States
German Research Foundation (DFG)464295817 Germany
CitationJournal: Nat Commun / Year: 2023
Title: Structural mechanisms of TRPM7 activation and inhibition.
Authors: Kirill D Nadezhdin / Leonor Correia / Chamali Narangoda / Dhilon S Patel / Arthur Neuberger / Thomas Gudermann / Maria G Kurnikova / Vladimir Chubanov / Alexander I Sobolevsky /
Abstract: The transient receptor potential channel TRPM7 is a master regulator of the organismal balance of divalent cations that plays an essential role in embryonic development, immune responses, cell ...The transient receptor potential channel TRPM7 is a master regulator of the organismal balance of divalent cations that plays an essential role in embryonic development, immune responses, cell mobility, proliferation, and differentiation. TRPM7 is implicated in neuronal and cardiovascular disorders, tumor progression and has emerged as a new drug target. Here we use cryo-EM, functional analysis, and molecular dynamics simulations to uncover two distinct structural mechanisms of TRPM7 activation by a gain-of-function mutation and by the agonist naltriben, which show different conformational dynamics and domain involvement. We identify a binding site for highly potent and selective inhibitors and show that they act by stabilizing the TRPM7 closed state. The discovered structural mechanisms provide foundations for understanding the molecular basis of TRPM7 channelopathies and drug development.
History
DepositionApr 14, 2023-
Header (metadata) releaseMay 17, 2023-
Map releaseMay 17, 2023-
UpdateMay 24, 2023-
Current statusMay 24, 2023Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_40496.png

Downloads & links

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Map

FileDownload / File: emd_40496.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryo-EM structure of TRPM7 in MSP2N2 nanodisc in apo state
Voxel sizeX=Y=Z: 0.83 Å
Density
Contour LevelBy AUTHOR: 0.247
Minimum - Maximum-1.4579743 - 2.5573123
Average (Standard dev.)0.010134932 (±0.07839835)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 249.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: Half Map 1

Fileemd_40496_half_map_1.map
AnnotationHalf Map 1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half Map 2

Fileemd_40496_half_map_2.map
AnnotationHalf Map 2
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : sample 1

EntireName: sample 1
Components
  • Complex: sample 1
    • Protein or peptide: Transient receptor potential cation channel subfamily M member 7
  • Ligand: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
  • Ligand: CHOLESTEROL
  • Ligand: 2-[2-[(1~{S},2~{S},4~{S},5'~{R},6~{R},7~{S},8~{R},9~{S},12~{S},13~{R},16~{S})-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.0^{2,9}.0^{4,8}.0^{13,18}]icos-18-ene-6,2'-oxane]-16-yl]oxyethyl]propane-1,3-diol
  • Ligand: SODIUM IONSodium
  • Ligand: water

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Supramolecule #1: sample 1

SupramoleculeName: sample 1 / type: complex / ID: 1 / Chimera: Yes / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 700 KDa

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Macromolecule #1: Transient receptor potential cation channel subfamily M member 7

MacromoleculeName: Transient receptor potential cation channel subfamily M member 7
type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO / EC number: non-specific serine/threonine protein kinase
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 146.888875 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: SQKSWIESTL TKRECVYIIP SSKDPHRCLP GCQICQQLVR CFCGRLVKQH ACFTASLAMK YSDVKLGEHF NQAIEEWSVE KHTEQSPTD AYGVINFQGG SHSYRAKYVR LSYDTKPEII LQLLLKEWQM ELPKLVISVH GGMQKFELHP RIKQLLGKGL I KAAVTTGA ...String:
SQKSWIESTL TKRECVYIIP SSKDPHRCLP GCQICQQLVR CFCGRLVKQH ACFTASLAMK YSDVKLGEHF NQAIEEWSVE KHTEQSPTD AYGVINFQGG SHSYRAKYVR LSYDTKPEII LQLLLKEWQM ELPKLVISVH GGMQKFELHP RIKQLLGKGL I KAAVTTGA WILTGGVNTG VAKHVGDALK EHASRSSRKI CTIGIAPWGV IENRNDLVGR DVVAPYQTLL NPLSKLNVLN NL HSHFILV DDGTVGKYGA EVRLRRELEK TINQQRIHAR IGQGVPVVAL IFEGGPNVIL TVLEYLQESP PVPVVVCEGT GRA ADLLAY IHKQTEEGGN LPDAAEPDII STIKKTFNFG QSEAVHLFQT MMECMKKKEL ITVFHIGSED HQDIDVAILT ALLK GTNAS AFDQLILTLA WDRVDIAKNH VFVYGQQWLV GSLEQAMLDA LVMDRVSFVK LLIENGVSMH KFLTIPRLEE LYNTK QGPT NPMLFHLIRD VKQGNLPPGY KITLIDIGLV IEYLMGGTYR CTYTRKRFRL IYNSLGGNNR RSGRNTSSST PQLRKS HET FGNRADKKEK MRHNHFIKTA QPYRPKMDAS MEEGKKKRTK DEIVDIDDPE TKRFPYPLNE LLIWACLMKR QVMARFL WQ HGEESMAKAL VACKIYRSMA YEAKQSDLVD DTSEELKQYS NDFGQLAVEL LEQSFRQDET MAMKLLTYEL KNWSNSTC L KLAVSSRLRP FVAHTCTQML LSDMWMGRLN MRKNSWYKVI LSILVPPAIL MLEYKTKAEM SHIPQSQDAH QMTMEDSEN NFHNITEEIP MEVFKEVKIL DSSDGKNEME IHIKSKKLPI TRKFYAFYHA PIVKFWFNTL AYLGFLMLYT FVVLVKMEQL PSVQEWIVI AYIFTYAIEK VREVFMSEAG KISQKIKVWF SDYFNVSDTI AIISFFVGFG LRFGAKWNYI NAYDNHVFVA G RLIYCLNI IFWYVRLLDF LAVNQQAGPY VMMIGKMVAN MFYIVVIMAL VLLSFGVPRK AILYPHEEPS WSLAKDIVFH PY WMIFGEV YAYEIDVCAN DSTLPTICGP GTWLTPFLQA VYLFVQYIIM VNLLIAFFNN VYLQVKAISN IVWKYQRYHF IMA YHEKPV LPPPLIILSH IVSLFCCVCK RRKKDKTSDG PKLFLTEEDQ KKLHDFEEQC VEMYFDEKDD KFNSGSEERI RVTF ERVEQ MSIQIKEVGD RVNYIKRSLQ SLDSQIGHLQ DLSALTVDTL KTLTAQKASE ASKVHNEITR ELSISKHLAQ NLID

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Macromolecule #2: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(tri...

MacromoleculeName: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
type: ligand / ID: 2 / Number of copies: 64 / Formula: POV
Molecular weightTheoretical: 760.076 Da
Chemical component information

ChemComp-POV:
(2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate / phospholipid*YM / POPC

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Macromolecule #3: CHOLESTEROL

MacromoleculeName: CHOLESTEROL / type: ligand / ID: 3 / Number of copies: 4 / Formula: CLR
Molecular weightTheoretical: 386.654 Da
Chemical component information

ChemComp-CLR:
CHOLESTEROL / Cholesterol

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Macromolecule #4: 2-[2-[(1~{S},2~{S},4~{S},5'~{R},6~{R},7~{S},8~{R},9~{S},12~{S},13...

MacromoleculeName: 2-[2-[(1~{S},2~{S},4~{S},5'~{R},6~{R},7~{S},8~{R},9~{S},12~{S},13~{R},16~{S})-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.0^{2,9}.0^{4,8}.0^{13,18}]icos-18-ene-6,2'-oxane]-16-yl]oxyethyl]propane-1,3-diol
type: ligand / ID: 4 / Number of copies: 4 / Formula: DU0
Molecular weightTheoretical: 516.752 Da
Chemical component information

ChemComp-DU0:
2-[2-[(1~{S},2~{S},4~{S},5'~{R},6~{R},7~{S},8~{R},9~{S},12~{S},13~{R},16~{S})-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.0^{2,9}.0^{4,8}.0^{13,18}]icos-18-ene-6,2'-oxane]-16-yl]oxyethyl]propane-1,3-diol

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Macromolecule #5: SODIUM ION

MacromoleculeName: SODIUM ION / type: ligand / ID: 5 / Number of copies: 2
Molecular weightTheoretical: 22.99 Da

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Macromolecule #6: water

MacromoleculeName: water / type: ligand / ID: 6 / Number of copies: 168 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER / Water

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration2.2 mg/mL
BufferpH: 8
Component:
ConcentrationFormulaName
150.0 mMNaClSodium chloridesodium chloride
20.0 mMtris(hydroxymethyl)aminomethane
1.0 mMbeta-Mercaptoethanol2-Mercaptoethanol
GridModel: C-flat-1.2/1.3 / Support film - Material: GOLD / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 25 sec. / Pretreatment - Atmosphere: AIR / Pretreatment - Pressure: 0.039 kPa
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV
Detailsmouse TRPM7

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Electron microscopy

MicroscopeTFS KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.5 µm
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number grids imaged: 1 / Number real images: 5087 / Average exposure time: 2.5 sec. / Average electron dose: 58.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 1336887
Initial angle assignmentType: OTHER
Final angle assignmentType: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.19 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 178432
FSC plot (resolution estimation)

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Atomic model buiding 1

RefinementSpace: REAL
Output model

PDB-8si2:
Cryo-EM structure of TRPM7 in MSP2N2 nanodisc in apo state

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