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- EMDB-7822: Cryo-EM structure of the zebrafish TRPM2 channel in the presence ... -

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Basic information

Entry
Database: EMDB / ID: EMD-7822
TitleCryo-EM structure of the zebrafish TRPM2 channel in the presence of Ca2+
Map dataSingle-particle cryo-EM reconstruction of TRPM2
Sample
  • Complex: Transient receptor potential cation channel subfamily M member 2 (TRPM2)
    • Protein or peptide: Transient receptor potential cation channel, subfamily M
  • Ligand: CALCIUM IONCalcium
Biological speciesDanio rerio (zebrafish)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.8 Å
AuthorsYin Y / Wu M / Borschel WF / Lander GC / Lee S-Y
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS) United States
CitationJournal: Nat Commun / Year: 2019
Title: Visualizing structural transitions of ligand-dependent gating of the TRPM2 channel.
Authors: Ying Yin / Mengyu Wu / Allen L Hsu / William F Borschel / Mario J Borgnia / Gabriel C Lander / Seok-Yong Lee /
Abstract: The transient receptor potential melastatin 2 (TRPM2) channel plays a key role in redox sensation in many cell types. Channel activation requires binding of both ADP-ribose (ADPR) and Ca. The ...The transient receptor potential melastatin 2 (TRPM2) channel plays a key role in redox sensation in many cell types. Channel activation requires binding of both ADP-ribose (ADPR) and Ca. The recently published TRPM2 structures from Danio rerio in the ligand-free and the ADPR/Ca-bound conditions represent the channel in closed and open states, which uncovered substantial tertiary and quaternary conformational rearrangements. However, it is unclear how these rearrangements are achieved within the tetrameric channel during channel gating. Here we report the cryo-electron microscopy structures of Danio rerio TRPM2 in the absence of ligands, in complex with Ca alone, and with both ADPR and Ca, resolved to ~4.3 Å, ~3.8 Å, and ~4.2 Å, respectively. In contrast to the published results, our studies capture ligand-bound TRPM2 structures in two-fold symmetric intermediate states, offering a glimpse of the structural transitions that bridge the closed and open conformations.
History
DepositionApr 23, 2018-
Header (metadata) releaseJun 13, 2018-
Map releaseMay 15, 2019-
UpdateDec 18, 2019-
Current statusDec 18, 2019Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.05
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.05
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6d73
  • Surface level: 0.05
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_7822.png

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Map

FileDownload / File: emd_7822.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationSingle-particle cryo-EM reconstruction of TRPM2
Voxel sizeX=Y=Z: 1.15 Å
Density
Contour LevelBy AUTHOR: 0.05 / Movie #1: 0.05
Minimum - Maximum-0.061772756 - 0.13455923
Average (Standard dev.)0.00055624865 (±0.00646365)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin0-3200
Dimensions320320320
Spacing320320320
CellA=B=C: 368.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.151.151.15
M x/y/z320320320
origin x/y/z0.0000.0000.000
length x/y/z368.000368.000368.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS-32000
NC/NR/NS320320320
D min/max/mean-0.0620.1350.001

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Supplemental data

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Half map: Half 1

Fileemd_7822_half_map_1.map
AnnotationHalf 1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half 2

Fileemd_7822_half_map_2.map
AnnotationHalf 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 : Transient receptor potential cation channel subfamily M member 2 ...

EntireName: Transient receptor potential cation channel subfamily M member 2 (TRPM2)
Components
  • Complex: Transient receptor potential cation channel subfamily M member 2 (TRPM2)
    • Protein or peptide: Transient receptor potential cation channel, subfamily M
  • Ligand: CALCIUM IONCalcium

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Supramolecule #1: Transient receptor potential cation channel subfamily M member 2 ...

SupramoleculeName: Transient receptor potential cation channel subfamily M member 2 (TRPM2)
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Danio rerio (zebrafish)
Recombinant expressionOrganism: Homo sapiens (human)

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Macromolecule #1: Transient receptor potential cation channel, subfamily M

MacromoleculeName: Transient receptor potential cation channel, subfamily M
type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Danio rerio (zebrafish)
Molecular weightTheoretical: 167.608625 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MALGTSGVKI HPNGNSNQLG VQLENVKLTS LFKKLDKRCS LASWIKENIK KKECCFYVED GREGICKCGY PKVQHCDEAI KPEDYMGEQ WDKHRHVRET PTDAFGDISF GGLGQKTGKY VRVSSDTSCE NLYQLMTEQW KLRSPNLLIS VTGGAKNFYI K THLKDKFR ...String:
MALGTSGVKI HPNGNSNQLG VQLENVKLTS LFKKLDKRCS LASWIKENIK KKECCFYVED GREGICKCGY PKVQHCDEAI KPEDYMGEQ WDKHRHVRET PTDAFGDISF GGLGQKTGKY VRVSSDTSCE NLYQLMTEQW KLRSPNLLIS VTGGAKNFYI K THLKDKFR RGLIKVAQTT GAWILTGGTH AGVMKHVGMA VRDYTLSSGS MEGQIVVIGV APWGVIHNRS TLIHPEGRFP AY YSLDEQG QGRLSCLDIN HTHFLLVDDG TQGHYGVEIE LRARLEKLIS KLSLGNRESG VTIPVVCVVL DGGPGTLNTI YNS MLNHTP CVVLEGSGRL ADVIAHVASV PVSKVTMALI NRLLKRFFMQ EYKNFTELQI IEWTKKIQDI LRMPHLLTVF RIDE DKNYD VDVAILQALL KASRSDEHAG RHCWERQLEL AVAWNRVDIA ESEIFTEESQ WTSSDLHPAM FSALVGDKPE FVRLL LENG VCVREFLERE ETLCELYSHL PSCFFLRKLA KRVQGGKMRR GQEPLPGSRK VCLSHVSEEV RHLLGSFTQP LYIASR YKP TKDDVRLKVP SKGALDLPCS GEEWSADTVW DPGRDLFLWA VVQNNRELAE IGWEQCRDCI AAALAASKIL RKLAQES GE DDSEEATEML ELANHYEKQA IGVFSECHSW DAQRAQKLLI RISPSWGRST CLWLALEAHD KSFIAHSGVQ ALLTQIWC G ELSVDNPHWK VLLCMIFFPL IYTGFLTFRR DEDIQRQAER TEQQKLAMES VFAGQSDGKI KRHLRGFSQK SELKPLNCS SRLMSFLKSP QVKFYWNIAS YFGFLWLFAV VLMIDFQTSP SWRELLLYVW LTSLVCEEIR QLYHDFDGSG FRRKAKMYIK DLWNILDVL SIVLFIAGLI CRLQASDTVF YIGKVILCID FIIFCLRLMA IFSISRTLGP KIIIVRRMML DLFFFMFLLS I WVVAYGVA KQGILIENEE RLNWIIRGAV YEPYITIFGN FPTNIDNTLF DISSCSVNAS DPLKPKCPML NADNTPVFPE WL TIMMLCV YLLFANILLL NLLIAIFNYT FQEVQDNTDT IWKFQRYELI KEYHSRPALP PPFILLSHLI LFIRGVFLRD LPQ RHKNFR QELEQTEEEE LLSWEAYMKD NYLASTRQDE SQSVEHRIHD TAEKVGAMSE LLEREQEMV(UNK) (UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)DEEAPHM FARQLQYPDS TVRRFPVPEE KVSWEVNFSP YQPPVYNQQD SSESDTSALD KHRNPGGR T GIRGKGALNT LGPNHILHPI FTRWRDAEHK VLEFLAVWED AEKRWALLGG PAQPDEPLAQ VLERILGKKL NEKTKTLLK AGEEVYKGYV DDSRNTDNAW VETSIITLHC DKNTPLMADL NHMVESSLSS HQPLQWREVS SDACRCSYQR EALRQIAHHH NTYFSNSLE VLFQGPDYKD DDDKAHHHHH HHHHH

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Macromolecule #2: CALCIUM ION

MacromoleculeName: CALCIUM ION / type: ligand / ID: 2 / Number of copies: 4 / Formula: CA
Molecular weightTheoretical: 40.078 Da

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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

Concentration0.5 mg/mL
BufferpH: 8
GridModel: Quantifoil, UltrAuFoil, R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Pretreatment - Type: PLASMA CLEANING
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: HOMEMADE PLUNGER

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.2 µm / Nominal magnification: 36000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Digitization - Dimensions - Width: 3710 pixel / Digitization - Dimensions - Height: 3838 pixel / Digitization - Sampling interval: 5.0 µm / Digitization - Frames/image: 1-64 / Number real images: 3039 / Average exposure time: 16.0 sec. / Average electron dose: 63.0 e/Å2
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 1791114
CTF correctionSoftware: (Name: CTFFIND (ver. 4), RELION (ver. 2.1))
Startup modelType of model: EMDB MAP
EMDB ID:

7127


Details: An initial model was generated from EMD-7127 low-pass filtered to 30 Angstrom resolution.
Initial angle assignmentType: PROJECTION MATCHING / Software - Name: RELION (ver. 2.1)
Final angle assignmentType: PROJECTION MATCHING / Software - Name: RELION (ver. 2.1)
Final reconstructionApplied symmetry - Point group: C2 (2 fold cyclic) / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 2.1) / Number images used: 93573
FSC plot (resolution estimation)

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: RIGID BODY FIT / Overall B value: 100
Output model

PDB-6d73:
Cryo-EM structure of the zebrafish TRPM2 channel in the presence of Ca2+

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