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- EMDB-26772: Cryogenic electron microscopy 3D map of F-actin bound by human di... -
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Open data
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Basic information
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Title | Cryogenic electron microscopy 3D map of F-actin bound by human dimeric alpha-catenin | |||||||||
![]() | Cryoem map | |||||||||
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Function / homology | ![]() negative regulation of integrin-mediated signaling pathway / CDH11 homotypic and heterotypic interactions / Regulation of CDH19 Expression and Function / Regulation of CDH11 function / gamma-catenin binding / epithelial cell-cell adhesion / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() | |||||||||
Method | helical reconstruction / ![]() | |||||||||
![]() | Rangarajan ES / Smith EW / Izard T | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Distinct inter-domain interactions of dimeric versus monomeric α-catenin link cell junctions to filaments. Authors: Erumbi S Rangarajan / Emmanuel W Smith / Tina Izard / ![]() Abstract: Attachment between cells is crucial for almost all aspects of the life of cells. These inter-cell adhesions are mediated by the binding of transmembrane cadherin receptors of one cell to cadherins of ...Attachment between cells is crucial for almost all aspects of the life of cells. These inter-cell adhesions are mediated by the binding of transmembrane cadherin receptors of one cell to cadherins of a neighboring cell. Inside the cell, cadherin binds β-catenin, which interacts with α-catenin. The transitioning of cells between migration and adhesion is modulated by α-catenin, which links cell junctions and the plasma membrane to the actin cytoskeleton. At cell junctions, a single β-catenin/α-catenin heterodimer slips along filamentous actin in the direction of cytoskeletal tension which unfolds clustered heterodimers to form catch bonds with F-actin. Outside cell junctions, α-catenin dimerizes and links the plasma membrane to F-actin. Under cytoskeletal tension, α-catenin unfolds and forms an asymmetric catch bond with F-actin. To understand the mechanism of this important α-catenin function, we determined the 2.7 Å cryogenic electron microscopy (cryoEM) structures of filamentous actin alone and bound to human dimeric α-catenin. Our structures provide mechanistic insights into the role of the α-catenin interdomain interactions in directing α-catenin function and suggest a bivalent mechanism. Further, our cryoEM structure of human monomeric α-catenin provides mechanistic insights into α-catenin autoinhibition. Collectively, our structures capture the initial α-catenin interaction with F-actin before the sensing of force, which is a crucial event in cell adhesion and human disease. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 167.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 19.6 KB 19.6 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 16.4 KB | Display | ![]() |
Images | ![]() | 96 KB | ||
Others | ![]() ![]() | 165.4 MB 165.4 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7utjMC ![]() 7uxfC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||
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Annotation | Cryoem map | ||||||||||||||||||||
Voxel size | X=Y=Z: 1.087 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: Half map 1
File | emd_26772_half_map_1.map | ||||||||||||
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Annotation | Half map 1 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Half map 2
File | emd_26772_half_map_2.map | ||||||||||||
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Annotation | Half map 2 | ||||||||||||
Projections & Slices |
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Density Histograms |
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Sample components
-Entire : dimeric alpha-catenin (residues 22-906) complexed with F-actin
Entire | Name: dimeric alpha-catenin (residues 22-906) complexed with F-actin |
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Components |
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-Supramolecule #1: dimeric alpha-catenin (residues 22-906) complexed with F-actin
Supramolecule | Name: dimeric alpha-catenin (residues 22-906) complexed with F-actin type: complex / ID: 1 / Chimera: Yes / Parent: 0 / Macromolecule list: #1-#2 |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: Actin, alpha skeletal muscle
Macromolecule | Name: Actin, alpha skeletal muscle / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 42.109973 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: MCDEDETTAL VCDNGSGLVK AGFAGDDAPR AVFPSIVGRP RHQGVMVGMG QKDSYVGDEA QSKRGILTLK YPIE(HIC)G IIT NWDDMEKIWH HTFYNELRVA PEEHPTLLTE APLNPKANRE KMTQIMFETF NVPAMYVAIQ AVLSLYASGR TTGIVLD SG DGVTHNVPIY ...String: MCDEDETTAL VCDNGSGLVK AGFAGDDAPR AVFPSIVGRP RHQGVMVGMG QKDSYVGDEA QSKRGILTLK YPIE(HIC)G IIT NWDDMEKIWH HTFYNELRVA PEEHPTLLTE APLNPKANRE KMTQIMFETF NVPAMYVAIQ AVLSLYASGR TTGIVLD SG DGVTHNVPIY EGYALPHAIM RLDLAGRDLT DYLMKILTER GYSFVTTAER EIVRDIKEKL CYVALDFENE MATAASSS S LEKSYELPDG QVITIGNERF RCPETLFQPS FIGMESAGIH ETTYNSIMKC DIDIRKDLYA NNVMSGGTTM YPGIADRMQ KEITALAPST MKIKIIAPPE RKYSVWIGGS ILASLSTFQQ MWITKQEYDE AGPSIVHRKC F |
-Macromolecule #2: Catenin alpha-1
Macromolecule | Name: Catenin alpha-1 / type: protein_or_peptide / ID: 2 / Number of copies: 6 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 98.216031 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: GPHMTLAVER LLEPLVTQVT TLVNTNSKGP SNKKRGRSKK AHVLAASVEQ ATENFLEKGD KIAKESQFLK EELVAAVEDV RKQGDLMKA AAGEFADDPC SSVKRGNMVR AARALLSAVT RLLILADMAD VYKLLVQLKV VEDGILKLRN AGNEQDLGIQ Y KALKPEVD ...String: GPHMTLAVER LLEPLVTQVT TLVNTNSKGP SNKKRGRSKK AHVLAASVEQ ATENFLEKGD KIAKESQFLK EELVAAVEDV RKQGDLMKA AAGEFADDPC SSVKRGNMVR AARALLSAVT RLLILADMAD VYKLLVQLKV VEDGILKLRN AGNEQDLGIQ Y KALKPEVD KLNIMAAKRQ QELKDVGHRD QMAAARGILQ KNVPILYTAS QACLQHPDVA AYKANRDLIY KQLQQAVTGI SN AAQATAS DDASQHQGGG GGELAYALNN FDKQIIVDPL SFSEERFRPS LEERLESIIS GAALMADSSC TRDDRRERIV AEC NAVRQA LQDLLSEYMG NAGRKERSDA LNSAIDKMTK KTRDLRRQLR KAVMDHVSDS FLETNVPLLV LIEAAKNGNE KEVK EYAQV FREHANKLIE VANLACSISN NEEGVKLVRM SASQLEALCP QVINAALALA AKPQSKLAQE NMDLFKEQWE KQVRV LTDA VDDITSIDDF LAVSENHILE DVNKCVIALQ EKDVDGLDRT AGAIRGRAAR VIHVVTSEMD NYEPGVYTEK VLEATK LLS NTVMPRFTEQ VEAAVEALSS DPAQPMDENE FIDASRLVYD GIRDIRKAVL MIRTPEELDD SDFETEDFDV RSRTSVQ TE DDQLIAGQSA RAIMAQLPQE QKAKIAEQVA SFQEEKSKLD AEVSKWDDSG NDIIVLAKQM CMIMMEMTDF TRGKGPLK N TSDVISAAKK IAEAGSRMDK LGRTIADHCP DSACKQDLLA YLQRIALYCH QLNICSKVKA EVQNLGGELV VSGVDSAMS LIQAAKNLMN AVVQTVKASY VASTKYQKSQ GMASLNLPAV SWKMKAPEKK PLVKREKQDE TQTKIKRASQ KKHVNPVQAL SEFKAMDSI |
-Macromolecule #3: ADENOSINE-5'-DIPHOSPHATE
Macromolecule | Name: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 3 / Number of copies: 6 / Formula: ADP |
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Molecular weight | Theoretical: 427.201 Da |
Chemical component information | ![]() ChemComp-ADP: |
-Macromolecule #4: MAGNESIUM ION
Macromolecule | Name: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 6 / Formula: MG |
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Molecular weight | Theoretical: 24.305 Da |
-Macromolecule #5: water
Macromolecule | Name: water / type: ligand / ID: 5 / Number of copies: 21 / Formula: HOH |
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Molecular weight | Theoretical: 18.015 Da |
Chemical component information | ![]() ChemComp-HOH: |
-Experimental details
-Structure determination
Method | ![]() |
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![]() | helical reconstruction |
Aggregation state | filament |
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Sample preparation
Buffer | pH: 7.5 Component:
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Grid | Model: C-flat-1.2/1.3 / Material: COPPER / Mesh: 400 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. | ||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 65 % / Chamber temperature: 294.15 K / Instrument: LEICA EM GP |
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Electron microscopy
Microscope | JEOL CRYO ARM 300 |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Specialist optics | Phase plate: OTHER / Energy filter - Name: In-column Omega Filter |
Sample stage | Specimen holder model: JEOL CRYOSPECPORTER / Cooling holder cryogen: NITROGEN |
Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number grids imaged: 2 / Average exposure time: 0.1 sec. / Average electron dose: 60.0 e/Å2 |