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Yorodumi- EMDB-27982: Structure of the full-length IP3R1 channel determined at high Ca2+ -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-27982 | ||||||||||||||||||||||||
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Title | Structure of the full-length IP3R1 channel determined at high Ca2+ | ||||||||||||||||||||||||
Map data | |||||||||||||||||||||||||
Sample |
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Function / homology | Function and homology information Effects of PIP2 hydrolysis / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / inositol 1,4,5-trisphosphate receptor activity involved in regulation of postsynaptic cytosolic calcium levels / Elevation of cytosolic Ca2+ levels / cGMP effects / smooth endoplasmic reticulum membrane / platelet dense tubular network / negative regulation of calcium-mediated signaling / platelet dense granule membrane / calcineurin complex ...Effects of PIP2 hydrolysis / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / inositol 1,4,5-trisphosphate receptor activity involved in regulation of postsynaptic cytosolic calcium levels / Elevation of cytosolic Ca2+ levels / cGMP effects / smooth endoplasmic reticulum membrane / platelet dense tubular network / negative regulation of calcium-mediated signaling / platelet dense granule membrane / calcineurin complex / epithelial fluid transport / ion channel modulating, G protein-coupled receptor signaling pathway / phospholipase C-activating G protein-coupled acetylcholine receptor signaling pathway / inositol 1,4,5-trisphosphate-sensitive calcium-release channel activity / voluntary musculoskeletal movement / inositol 1,4,5 trisphosphate binding / positive regulation of calcium ion transport / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / endoplasmic reticulum calcium ion homeostasis / positive regulation of hepatocyte proliferation / nuclear inner membrane / transport vesicle membrane / Ion homeostasis / dendrite development / intracellularly gated calcium channel activity / ligand-gated ion channel signaling pathway / GABA-ergic synapse / intrinsic apoptotic signaling pathway in response to endoplasmic reticulum stress / calcium channel inhibitor activity / release of sequestered calcium ion into cytosol / cellular response to cAMP / phosphatidylinositol binding / post-embryonic development / secretory granule membrane / synaptic membrane / sarcoplasmic reticulum / liver regeneration / Schaffer collateral - CA1 synapse / cell morphogenesis / positive regulation of neuron projection development / positive regulation of insulin secretion / calcium ion transport / presynapse / nuclear envelope / phospholipase C-activating G protein-coupled receptor signaling pathway / positive regulation of cytosolic calcium ion concentration / cellular response to hypoxia / postsynapse / protein phosphatase binding / transmembrane transporter binding / postsynaptic density / response to hypoxia / positive regulation of apoptotic process / protein domain specific binding / neuronal cell body / dendrite / synapse / calcium ion binding / protein-containing complex binding / endoplasmic reticulum membrane / nucleolus / negative regulation of apoptotic process / perinuclear region of cytoplasm / endoplasmic reticulum / protein-containing complex / membrane / identical protein binding / plasma membrane / cytoplasm Similarity search - Function | ||||||||||||||||||||||||
Biological species | Rattus norvegicus (Norway rat) / Norway rat (Norway rat) | ||||||||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.26 Å | ||||||||||||||||||||||||
Authors | Fan G / Baker MR / Terry LE / Arige V / Chen M / Seryshev AB / Baker ML / Ludtke SJ / Yule DI / Serysheva II | ||||||||||||||||||||||||
Funding support | United States, 7 items
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Citation | Journal: Nat Commun / Year: 2022 Title: Conformational motions and ligand-binding underlying gating and regulation in IPR channel. Authors: Guizhen Fan / Mariah R Baker / Lara E Terry / Vikas Arige / Muyuan Chen / Alexander B Seryshev / Matthew L Baker / Steven J Ludtke / David I Yule / Irina I Serysheva / Abstract: Inositol-1,4,5-trisphosphate receptors (IPRs) are activated by IP and Ca and their gating is regulated by various intracellular messengers that finely tune the channel activity. Here, using single ...Inositol-1,4,5-trisphosphate receptors (IPRs) are activated by IP and Ca and their gating is regulated by various intracellular messengers that finely tune the channel activity. Here, using single particle cryo-EM analysis we determined 3D structures of the nanodisc-reconstituted IPR1 channel in two ligand-bound states. These structures provide unprecedented details governing binding of IP, Ca and ATP, revealing conformational changes that couple ligand-binding to channel opening. Using a deep-learning approach and 3D variability analysis we extracted molecular motions of the key protein domains from cryo-EM density data. We find that IP binding relies upon intrinsic flexibility of the ARM2 domain in the tetrameric channel. Our results highlight a key role of dynamic side chains in regulating gating behavior of IPR channels. This work represents a stepping-stone to developing mechanistic understanding of conformational pathways underlying ligand-binding, activation and regulation of the channel. | ||||||||||||||||||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_27982.map.gz | 135.6 MB | EMDB map data format | |
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Header (meta data) | emd-27982-v30.xml emd-27982.xml | 23.8 KB 23.8 KB | Display Display | EMDB header |
Images | emd_27982.png | 114.9 KB | ||
Others | emd_27982_half_map_1.map.gz emd_27982_half_map_2.map.gz | 109.1 MB 109.2 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-27982 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-27982 | HTTPS FTP |
-Related structure data
Related structure data | 8eaqMC 8earC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_27982.map.gz / Format: CCP4 / Size: 144.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||
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Voxel size | X=Y=Z: 1.07 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_27982_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_27982_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
-Entire : Type 1 inositol 1,4,5-trisphosphate receptor tetrameric protein c...
Entire | Name: Type 1 inositol 1,4,5-trisphosphate receptor tetrameric protein complex |
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Components |
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-Supramolecule #1: Type 1 inositol 1,4,5-trisphosphate receptor tetrameric protein c...
Supramolecule | Name: Type 1 inositol 1,4,5-trisphosphate receptor tetrameric protein complex type: complex / Chimera: Yes / ID: 1 / Parent: 0 / Macromolecule list: #1 |
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Source (natural) | Organism: Rattus norvegicus (Norway rat) / Organ: cerebellum / Organelle: endoplasmic reticulum / Location in cell: membrane |
Molecular weight | Theoretical: 1.3 MDa |
-Macromolecule #1: Inositol 1,4,5-trisphosphate receptor type 1
Macromolecule | Name: Inositol 1,4,5-trisphosphate receptor type 1 / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO |
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Source (natural) | Organism: Norway rat (Norway rat) / Organ: cerebellum |
Molecular weight | Theoretical: 313.657406 KDa |
Sequence | String: MSDKMSSFLH IGDICSLYAE GSTNGFISTL GLVDDRCVVQ PEAGDLNNPP KKFRDCLFKL CPMNRYSAQK QFWKAAKPGA NSTTDAVLL NKLHHAADLE KKQNETENRK LLGTVIQYGN VIQLLHLKSN KYLTVNKRLP ALLEKNAMRV TLDEAGNEGS W FYIQPFYK ...String: MSDKMSSFLH IGDICSLYAE GSTNGFISTL GLVDDRCVVQ PEAGDLNNPP KKFRDCLFKL CPMNRYSAQK QFWKAAKPGA NSTTDAVLL NKLHHAADLE KKQNETENRK LLGTVIQYGN VIQLLHLKSN KYLTVNKRLP ALLEKNAMRV TLDEAGNEGS W FYIQPFYK LRSIGDSVVI GDKVVLNPVN AGQPLHASSH QLVDNPGCNE VNSVNCNTSW KIVLFMKWSD NKDDILKGGD VV RLFHAEQ EKFLTCDEHR KKQHVFLRTT GRQSATSATS SKALWEVEVV QHDPCRGGAG YWNSLFRFKH LATGHYLAAE VDP DFEEEC LEFQPSVDPD QDASRSRLRN AQEKMVYSLV SVPEGNDISS IFELDPTTLR GGDSLVPRNS YVRLRHLCTN TWVH STNIP IDKEEEKPVM LKIGTSPLKE DKEAFAIVPV SPAEVRDLDF ANDASKVLGS IAGKLEKGTI TQNERRSVTK LLEDL VYFV TGGTNSGQDV LEVVFSKPNR ERQKLMREQN ILKQIFKLLQ APFTDCGDGP MLRLEELGDQ RHAPFRHICR LCYRVL RHS QQDYRKNQEY IAKQFGFMQK QIGYDVLAED TITALLHNNR KLLEKHITAA EIDTFVSLVR KNREPRFLDY LSDLCVS MN KSIPVTQELI CKAVLNPTNA DILIETKLVL SRFEFEGVST GENALEAGED EEEVWLFWRD SNKEIRSKSV RELAQDAK E GQKEDRDVLS YYRYQLNLFA RMCLDRQYLA INEISGQLDV DLILRCMSDE NLPYDLRASF CRLMLHMHVD RDPQEQVTP VKYARLWSEI PSEIAIDDYD SSGASKDEIK ERFAQTMEFV EEYLRDVVCQ RFPFSDKEKN KLTFEVVNLA RNLIYFGFYN FSDLLRLTK ILLAILDCVH VTTIFPISKM TKGEENKGSN VMRSIHGVGE LMTQVVLRGG GFLPMTPMAA APEGNVKQAE P EKEDIMVM DTKLKIIEIL QFILNVRLDY RISCLLCIFK REFDESNSQS SETSSGNSSQ EGPSNVPGAL DFEHIEEQAE GI FGGSEEN TPLDLDDHGG RTFLRVLLHL TMHDYPPLVS GALQLLFRHF SQRQEVLQAF KQVQLLVTSQ DVDNYKQIKQ DLD QLRSIV EKSELWVYKG QGPDEPMDGA SGENEHKKTE EGTSKPLKHE STSSYNYRVV KEILIRLSKL CVQESASVRK SRKQ QQRLL RNMGAHAVVL ELLQIPYEKA EDTKMQEIMR LAHEFLQNFC AGNQQNQALL HKHINLFLNP GILEAVTMQH IFMNN FQLC SEINERVVQH FVHCIETHGR NVQYIKFLQT IVKAEGKFIK KCQDMVMAEL VNSGEDVLVF YNDRASFQTL IQMMRS ERD RMDENSPLFM YHIHLVELLA VCTEGKNVYT EIKCNSLLPL DDIVRVVTHE DCIPEVKIAY INFLNHCYVD TEVEMKE IY TSNHMWKLFE NFLVDICRAC NNTSDRKHAD SVLEKYVTEI VMSIVTTFFS SPFSDQSTTL QTRQPVFVQL LQGVFRVY H CNWLMPSQKA SVESCIRVLS DVAKSRAIAI PVDLDSQVNN LFLKSHNIVQ KTAMNWRLSA RNAARRDSVL AASRDYRNI IERLQDIVSA LEDRLRPLVQ AELSVLVDVL HRPELLFPEN TDARRKCESG GFICKLIKHT KQLLEENEEK LCIKVLQTLR EMMTKDRGY GEKQISIDEL ENAELPQPPE AENSTEQELE PSPPLRQLED HKRGEALRQI LVNRYYGNIR PSGRRESLTS F GNGPLSPG GPSKPGGGGG GPGSGSTSRG EMSLAEVQCH LDKEGASNLV IDLIMNASSD RVFHESILLA IALLEGGNTT IQ HSFFCRL TEDKKSEKFF KVFYDRMKVA QQEIKATVTV NTSDLGNKKK DDEVDRDAPS RKKAKEPTTQ ITEEVRDQLL EAS AATRKA FTTFRREADP DDHYQSGEGT QATTDKAKDD LEMSAVITIM QPILRFLQLL CENHNRDLQN FLRCQNNKTN YNLV CETLQ FLDCICGSTT GGLGLLGLYI NEKNVALINQ TLESLTEYCQ GPCHENQNCI ATHESNGIDI ITALILNDIN PLGKK RMDL VLELKNNASK LLLAIMESRH DSENAERILY NMRPKELVEV IKKAYMQGEV EFEDGENGED GAASPRNVGH NIYILA HQL ARHNKELQTM LKPGGQVDGD EALEFYAKHT AQIEIVRLDR TMEQIVFPVP SICEFLTKES KLRIYYTTER DEQGSKI ND FFLRSEDLFN EMNWQKKLRA QPVLYWCARN MSFWSSISFN LAVLMNLLVA FFYPFKGVRG GTLEPHWSGL LWTAMLIS L AIVIALPKPH GIRALIASTI LRLIFSVGLQ PTLFLLGAFN VCNKIIFLMS FVGNCGTFTR GYRAMVLDVE FLYHLLYLL ICAMGLFVHE FFYSLLLFDL VYREETLLNV IKSVTRNGRP IILTAALALI LVYLFSIVGY LFFKDDFILE VDRLPNETAG PETGESLAN DFLYSDVCRV ETGENCTSPA PKEELLPVEE TEQDKEHTCE TLLMCIVTVL SHGLRSGGGV GDVLRKPSKE E PLFAARVI YDLLFFFMVI IIVLNLIFGV IIDTFADLRS EKQKKEEILK TTCFICGLER DKFDNKTVTF EEHIKEEHNM WH YLCFIVL VKVKDSTEYT GPESYVAEMI RERNLDWFPR MRAMSLVSSD SEGEQNELRN LQEKLESTMK LVTNLSGQLS ELK DQMTEQ RKQKQRIGLL GHPPHMNVNP QQPA |
-Macromolecule #2: ZINC ION
Macromolecule | Name: ZINC ION / type: ligand / ID: 2 / Number of copies: 4 / Formula: ZN |
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Molecular weight | Theoretical: 65.409 Da |
-Macromolecule #3: CALCIUM ION
Macromolecule | Name: CALCIUM ION / type: ligand / ID: 3 / Number of copies: 20 / Formula: CA |
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Molecular weight | Theoretical: 40.078 Da |
-Macromolecule #4: (9R,11S)-9-({[(1S)-1-HYDROXYHEXADECYL]OXY}METHYL)-2,2-DIMETHYL-5,...
Macromolecule | Name: (9R,11S)-9-({[(1S)-1-HYDROXYHEXADECYL]OXY}METHYL)-2,2-DIMETHYL-5,7,10-TRIOXA-2LAMBDA~5~-AZA-6LAMBDA~5~-PHOSPHAOCTACOSANE-6,6,11-TRIOL type: ligand / ID: 4 / Number of copies: 28 / Formula: PLX |
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Molecular weight | Theoretical: 767.132 Da |
Chemical component information | ChemComp-PLX: |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 1 mg/mL |
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Buffer | pH: 7.4 |
Grid | Model: Quantifoil R2/1 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
Details | reconstituted in lipid nanodisc |
-Electron microscopy
Microscope | TFS KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Calibrated magnification: 46943 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 130000 |
Specialist optics | Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Image recording | Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Detector mode: SUPER-RESOLUTION / Digitization - Dimensions - Width: 3840 pixel / Digitization - Dimensions - Height: 3712 pixel / Digitization - Sampling interval: 5.0 µm / Number real images: 25125 / Average exposure time: 0.2 sec. / Average electron dose: 49.0 e/Å2 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Particle selection | Number selected: 1955320 / Details: NeuralNet autopicking in EMAN2 |
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CTF correction | Software - Name: Gctf |
Startup model | Type of model: EMDB MAP EMDB ID: Details: filtered to 60 angstroms |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3) |
Final 3D classification | Software - Name: RELION (ver. 3) |
Final angle assignment | Type: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3) |
Final reconstruction | Applied symmetry - Point group: C4 (4 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 3.26 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3) / Number images used: 346731 |