+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-6975 | |||||||||
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Title | 3.3 angstrom structure of mouse TRPM7 with EDTA | |||||||||
Map data | ||||||||||
Sample |
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Keywords | CryoEM / Truncated mouse TRPM7 / MEMBRANE PROTEIN / TRANSFERASE | |||||||||
Function / homology | Function and homology information 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 | Mus musculus (house mouse) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.28 Å | |||||||||
Authors | Zhang J / Li Z | |||||||||
Citation | Journal: Proc Natl Acad Sci U S A / Year: 2018 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 |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_6975.map.gz | 6.1 MB | EMDB map data format | |
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Header (meta data) | emd-6975-v30.xml emd-6975.xml | 11.1 KB 11.1 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_6975_fsc.xml | 9.1 KB | Display | FSC data file |
Images | emd_6975.png | 189.5 KB | ||
Filedesc metadata | emd-6975.cif.gz | 6.3 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-6975 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-6975 | HTTPS FTP |
-Validation report
Summary document | emd_6975_validation.pdf.gz | 423.1 KB | Display | EMDB validaton report |
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Full document | emd_6975_full_validation.pdf.gz | 422.7 KB | Display | |
Data in XML | emd_6975_validation.xml.gz | 10.9 KB | Display | |
Data in CIF | emd_6975_validation.cif.gz | 14.3 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-6975 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-6975 | HTTPS FTP |
-Related structure data
Related structure data | 5zx5MC 7297C 7298C 6bwdC 6bwfC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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-Map
File | Download / File: emd_6975.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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
-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: #1 |
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Source (natural) | Organism: Mus musculus (house mouse) |
-Macromolecule #1: Transient receptor potential cation channel subfamily M member 7
Macromolecule | Name: 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 |
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Source (natural) | Organism: Mus musculus (house mouse) |
Molecular weight | Theoretical: 141.417719 KDa |
Recombinant expression | Organism: Spodoptera frugiperda (fall armyworm) |
Sequence | String: 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 SLDS UniProtKB: Transient receptor potential cation channel subfamily M member 7 |
-Macromolecule #2: CHOLESTEROL HEMISUCCINATE
Macromolecule | Name: CHOLESTEROL HEMISUCCINATE / type: ligand / ID: 2 / Number of copies: 12 / Formula: Y01 |
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Molecular weight | Theoretical: 486.726 Da |
Chemical component information | ChemComp-Y01: |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE / Instrument: FEI VITROBOT MARK I |
-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: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | Model: Tecnai Polara / Image courtesy: FEI Company |