+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-7637 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | Cytoplasmic domain of mTRPC6 | |||||||||
Map data | Cytoplasmic domain of mTRPC6 | |||||||||
Sample |
| |||||||||
Keywords | Ion Channel / Membrane Protein / TRP Channel / TRPC6 / focal segmental glomerulosclerosis / TRANSPORT PROTEIN | |||||||||
Function / homology | Function and homology information Elevation of cytosolic Ca2+ levels / Effects of PIP2 hydrolysis / positive regulation of ion transmembrane transporter activity / manganese ion transport / slit diaphragm / negative regulation of dendrite morphogenesis / : / store-operated calcium channel activity / cation channel complex / TRP channels ...Elevation of cytosolic Ca2+ levels / Effects of PIP2 hydrolysis / positive regulation of ion transmembrane transporter activity / manganese ion transport / slit diaphragm / negative regulation of dendrite morphogenesis / : / store-operated calcium channel activity / cation channel complex / TRP channels / inositol 1,4,5 trisphosphate binding / positive regulation of calcium ion transport / actinin binding / clathrin binding / single fertilization / plasma membrane => GO:0005886 / monoatomic cation channel activity / regulation of cytosolic calcium ion concentration / positive regulation of neuron differentiation / positive regulation of peptidyl-threonine phosphorylation / calcium ion transmembrane transport / calcium channel activity / neuron differentiation / cellular response to hydrogen peroxide / monoatomic ion channel activity / actin binding / ATPase binding / positive regulation of cytosolic calcium ion concentration / cellular response to hypoxia / protein homodimerization activity / membrane / plasma membrane / cytoplasm Similarity search - Function | |||||||||
Biological species | Mus musculus (house mouse) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.8 Å | |||||||||
Authors | Azumaya CM / Sierra-Valdez FJ | |||||||||
Funding support | United States, 2 items
| |||||||||
Citation | Journal: J Biol Chem / Year: 2018 Title: Cryo-EM structure of the cytoplasmic domain of murine transient receptor potential cation channel subfamily C member 6 (TRPC6). Authors: Caleigh M Azumaya / Francisco Sierra-Valdez / Julio F Cordero-Morales / Terunaga Nakagawa / Abstract: The kidney maintains the internal milieu by regulating the retention and excretion of proteins, ions, and small molecules. The glomerular podocyte forms the slit diaphragm of the ultrafiltration ...The kidney maintains the internal milieu by regulating the retention and excretion of proteins, ions, and small molecules. The glomerular podocyte forms the slit diaphragm of the ultrafiltration filter, whose damage leads to progressive kidney failure and focal segmental glomerulosclerosis (FSGS). The canonical transient receptor potential 6 (TRPC6) ion channel is expressed in the podocyte, and mutations in its cytoplasmic domain cause FSGS in humans. evaluation of disease-causing mutations in TRPC6 has revealed that these genetic alterations result in abnormal ion channel gating. However, the mechanism whereby the cytoplasmic domain modulates TRPC6 function is largely unknown. Here, we report a cryo-EM structure of the cytoplasmic domain of murine TRPC6 at 3.8 Å resolution. The cytoplasmic fold of TRPC6 is characterized by an inverted dome-like chamber pierced by four radial horizontal helices that converge into a vertical coiled-coil at the central axis. Unlike other TRP channels, TRPC6 displays a unique domain swap that occurs at the junction of the horizontal helices and coiled-coil. Multiple FSGS mutations converge at the buried interface between the vertical coiled-coil and the ankyrin repeats, which form the dome, suggesting these regions are critical for allosteric gating modulation. This functionally critical interface is a potential target for drug design. Importantly, dysfunction in other family members leads to learning deficits (TRPC1/4/5) and ataxia (TRPC3). Our data provide a structural framework for the mechanistic investigation of the TRPC family. | |||||||||
History |
|
-Structure visualization
Movie |
Movie viewer |
---|---|
Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_7637.map.gz | 4.2 MB | EMDB map data format | |
---|---|---|---|---|
Header (meta data) | emd-7637-v30.xml emd-7637.xml | 20.1 KB 20.1 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_7637_fsc.xml | 9.1 KB | Display | FSC data file |
Images | emd_7637.png | 117.2 KB | ||
Masks | emd_7637_msk_1.map | 64 MB | Mask map | |
Filedesc metadata | emd-7637.cif.gz | 6.6 KB | ||
Others | emd_7637_half_map_1.map.gz emd_7637_half_map_2.map.gz | 45.9 MB 45.8 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-7637 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-7637 | HTTPS FTP |
-Related structure data
Related structure data | 6cv9MC M: atomic model generated by this map C: citing same article (ref.) |
---|---|
Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
---|---|
Related items in Molecule of the Month |
-Map
File | Download / File: emd_7637.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | Cytoplasmic domain of mTRPC6 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.41 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
|
-Supplemental data
-Mask #1
File | emd_7637_msk_1.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projections & Slices |
| ||||||||||||
Density Histograms |
-Half map: Halfmap1 for cytoplasmic domain of mTRPC6
File | emd_7637_half_map_1.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | Halfmap1 for cytoplasmic domain of mTRPC6 | ||||||||||||
Projections & Slices |
| ||||||||||||
Density Histograms |
-Half map: Halfmap2 for cytoplasmic domain of mTRPC6
File | emd_7637_half_map_2.map | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | Halfmap2 for cytoplasmic domain of mTRPC6 | ||||||||||||
Projections & Slices |
| ||||||||||||
Density Histograms |
-Sample components
-Entire : cytoplasmic domain of TRPC6
Entire | Name: cytoplasmic domain of TRPC6 |
---|---|
Components |
|
-Supramolecule #1: cytoplasmic domain of TRPC6
Supramolecule | Name: cytoplasmic domain of TRPC6 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
---|---|
Source (natural) | Organism: Mus musculus (house mouse) |
Molecular weight | Theoretical: 144 KDa |
-Macromolecule #1: Short transient receptor potential channel 6
Macromolecule | Name: Short transient receptor potential channel 6 / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO |
---|---|
Source (natural) | Organism: Mus musculus (house mouse) |
Molecular weight | Theoretical: 96.671375 KDa |
Recombinant expression | Organism: Spodoptera frugiperda (fall armyworm) |
Sequence | String: AMGSMLSIEE ERFLDAAEYG NIPVVRKMLE ECHSLNVNCV DYMGQNALQL AVANEHLEIT ELLLKKENLS RVGDALLLAI SKGYVRIVE AILNHPAFAE GKRLATSPSQ SELQQDDFYA YDEDGTRFSH DVTPIILAAH CQEYEIVHTL LRKGARIERP H DYFCKCTE ...String: AMGSMLSIEE ERFLDAAEYG NIPVVRKMLE ECHSLNVNCV DYMGQNALQL AVANEHLEIT ELLLKKENLS RVGDALLLAI SKGYVRIVE AILNHPAFAE GKRLATSPSQ SELQQDDFYA YDEDGTRFSH DVTPIILAAH CQEYEIVHTL LRKGARIERP H DYFCKCTE CSQKQKHDSF SHSRSRINAY KGLASPAYLS LSSEDPVMTA LELSNELAVL ANIEKEFKND YRKLSMQCKD FV VGLLDLC RNTEEVEAIL NGDAETRQPG DFGRPNLSRL KLAIKYEVKK FVAHPNCQQQ LLSIWYENLS GLRQQTMAVK FLV VLAVAI GLPFLALIYW CAPCSKMGKI LRGPFMKFVA HAASFTIFLG LLVMNAADRF EGTKLLPNET STDNARQLFR MKTS CFSWM EMLIISWVIG MIWAECKEIW TQGPKEYLFE LWNMLDFGML AIFAASFIAR FMAFWHASKA QSIIDANDTL KDLTK VTLG DNVKYYNLAR IKWDPTDPQI ISEGLYAIAV VLSFSRIAYI LPANESFGPL QISLGRTVKD IFKFMVIFIM VFVAFM IGM FNLYSYYIGA KQNEAFTTVE ESFKTLFWAI FGLSEVKSVV INYNHKFIEN IGYVLYGVYN VTMVIVLLNM LIAMINS SF QEIEDDADVE WKFARAKLWF SYFEEGRTLP VPFNLVPSPK SLLYLLLKFK KWMCELIQGQ KQGFQEDAEM NKRNEEKK F GISGSHEDLS KFSLDKNQLA HNKQSSTRSS EDYHLNSFSN PPRQYQKIMK RLIKRYVLQA QIDKESDEVN EGELKEIKQ DISSLRYELL EEKSQNTEDL AELIRKLGER LSLEPKLEES RR UniProtKB: Short transient receptor potential channel 6 |
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 0.3 mg/mL | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Buffer | pH: 7.4 Component:
| ||||||||||||
Grid | Model: C-flat-2/1 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 120 sec. / Pretreatment - Atmosphere: AIR / Details: 25 mA | ||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 281.15 K / Instrument: FEI VITROBOT MARK III Details: blotted for 8 seconds, 3 filter papers on each side. | ||||||||||||
Details | Monodisperse |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 0.001 mm / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.2 µm / Nominal magnification: 89000 |
Specialist optics | Spherical aberration corrector: Microscope was modified with a Cs aberration corrector Energy filter - Name: GIF Bioquantum / Energy filter - Lower energy threshold: 0 eV / Energy filter - Upper energy threshold: 20 eV |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Digitization - Dimensions - Width: 3838 pixel / Digitization - Dimensions - Height: 3710 pixel / Digitization - Frames/image: 1-30 / Number grids imaged: 2 / Number real images: 2618 / Average exposure time: 9.0 sec. / Average electron dose: 46.8 e/Å2 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: AB INITIO MODEL / Overall B value: 113 / Target criteria: Correlation coefficient |
---|---|
Output model | PDB-6cv9: |