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- PDB-6d8c: Cryo-EM structure of FLNaABD E254K bound to phalloidin-stabilized... -
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Basic information
Entry | Database: PDB / ID: 6d8c | |||||||||
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Title | Cryo-EM structure of FLNaABD E254K bound to phalloidin-stabilized F-actin | |||||||||
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![]() | STRUCTURAL PROTEIN / Actin-binding domain / Actin crosslinker | |||||||||
Function / homology | ![]() regulation of membrane repolarization during atrial cardiac muscle cell action potential / regulation of membrane repolarization during cardiac muscle cell action potential / establishment of Sertoli cell barrier / Myb complex / glycoprotein Ib-IX-V complex / adenylate cyclase-inhibiting dopamine receptor signaling pathway / formation of radial glial scaffolds / positive regulation of integrin-mediated signaling pathway / actin crosslink formation / tubulin deacetylation ...regulation of membrane repolarization during atrial cardiac muscle cell action potential / regulation of membrane repolarization during cardiac muscle cell action potential / establishment of Sertoli cell barrier / Myb complex / glycoprotein Ib-IX-V complex / adenylate cyclase-inhibiting dopamine receptor signaling pathway / formation of radial glial scaffolds / positive regulation of integrin-mediated signaling pathway / actin crosslink formation / tubulin deacetylation / blood coagulation, intrinsic pathway / protein localization to bicellular tight junction / OAS antiviral response / Striated Muscle Contraction / positive regulation of actin filament bundle assembly / positive regulation of neuron migration / Cell-extracellular matrix interactions / early endosome to late endosome transport / Fc-gamma receptor I complex binding / positive regulation of potassium ion transmembrane transport / apical dendrite / cell-cell junction organization / positive regulation of neural precursor cell proliferation / positive regulation of platelet activation / protein localization to cell surface / wound healing, spreading of cells / podosome / negative regulation of transcription by RNA polymerase I / megakaryocyte development / GP1b-IX-V activation signalling / receptor clustering / positive regulation of axon regeneration / cortical cytoskeleton / SMAD binding / RHO GTPases activate PAKs / actin filament bundle / brush border / semaphorin-plexin signaling pathway / striated muscle thin filament / skeletal muscle thin filament assembly / blood vessel remodeling / cilium assembly / mitotic spindle assembly / epithelial to mesenchymal transition / potassium channel regulator activity / axonal growth cone / heart morphogenesis / stress fiber / skeletal muscle fiber development / release of sequestered calcium ion into cytosol / positive regulation of substrate adhesion-dependent cell spreading / protein sequestering activity / regulation of cell migration / dendritic shaft / protein kinase C binding / protein localization to plasma membrane / actin filament / negative regulation of DNA-binding transcription factor activity / trans-Golgi network / mRNA transcription by RNA polymerase II / establishment of protein localization / G protein-coupled receptor binding / synapse organization / negative regulation of protein catabolic process / cerebral cortex development / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / small GTPase binding / Z disc / platelet aggregation / kinase binding / positive regulation of protein import into nucleus / actin filament binding / cell-cell junction / Platelet degranulation / actin cytoskeleton / negative regulation of neuron projection development / actin cytoskeleton organization / toxin activity / GTPase binding / angiogenesis / DNA-binding transcription factor binding / perikaryon / transmembrane transporter binding / positive regulation of canonical NF-kappaB signal transduction / hydrolase activity / postsynapse / protein stabilization / cadherin binding / focal adhesion / negative regulation of apoptotic process / nucleolus / perinuclear region of cytoplasm / glutamatergic synapse / protein homodimerization activity / RNA binding / extracellular exosome / extracellular region / ATP binding / nucleus / membrane Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||
Method | ELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 3.54 Å | |||||||||
![]() | Iwamoto, D.V. / Huehn, A.R. / Simon, B. / Huet-Calderwood, C. / Baldassarre, M. / Sindelar, C.V. / Calderwood, D.A. | |||||||||
![]() | ![]() Title: Structural basis of the filamin A actin-binding domain interaction with F-actin. Authors: Daniel V Iwamoto / Andrew Huehn / Bertrand Simon / Clotilde Huet-Calderwood / Massimiliano Baldassarre / Charles V Sindelar / David A Calderwood / ![]() ![]() Abstract: Actin-cross-linking proteins assemble actin filaments into higher-order structures essential for orchestrating cell shape, adhesion, and motility. Missense mutations in the tandem calponin homology ...Actin-cross-linking proteins assemble actin filaments into higher-order structures essential for orchestrating cell shape, adhesion, and motility. Missense mutations in the tandem calponin homology domains of their actin-binding domains (ABDs) underlie numerous genetic diseases, but a molecular understanding of these pathologies is hampered by the lack of high-resolution structures of any actin-cross-linking protein bound to F-actin. Here, taking advantage of a high-affinity, disease-associated mutant of the human filamin A (FLNa) ABD, we combine cryo-electron microscopy and functional studies to reveal at near-atomic resolution how the first calponin homology domain (CH1) and residues immediately N-terminal to it engage actin. We further show that reorientation of CH2 relative to CH1 is required to avoid clashes with actin and to expose F-actin-binding residues on CH1. Our data explain localization of disease-associated loss-of-function mutations to FLNaCH1 and gain-of-function mutations to the regulatory FLNaCH2. Sequence conservation argues that this provides a general model for ABD-F-actin binding. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 854.1 KB | Display | ![]() |
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PDB format | ![]() | 711.6 KB | Display | ![]() |
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-Validation report
Summary document | ![]() | 1.4 MB | Display | ![]() |
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Full document | ![]() | 1.4 MB | Display | |
Data in XML | ![]() | 76.6 KB | Display | |
Data in CIF | ![]() | 114.3 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7831MC ![]() 7832C ![]() 7833C ![]() 8918C M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 34476.250 Da / Num. of mol.: 5 / Fragment: UNP residues 1-278 / Mutation: E254K Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #2: Protein | Mass: 41862.613 Da / Num. of mol.: 5 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #3: Protein/peptide | #4: Chemical | ChemComp-ADP / #5: Chemical | ChemComp-MG / |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: FILAMENT / 3D reconstruction method: helical reconstruction |
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Sample preparation
Component | Name: Helical complex of FLNaABD E254K bound to phalloidin-stabilized F-actin Type: COMPLEX / Entity ID: #1-#3 / Source: MULTIPLE SOURCES |
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Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 8 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Instrument: HOMEMADE PLUNGER / Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 105000 X / Calibrated magnification: 37500 X / Nominal defocus max: 2900 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE |
Specimen holder | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 12 sec. / Electron dose: 50 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 2 / Num. of real images: 2140 Details: Micrographs from only one of the grids were used in the reconstruction. From that grid, only micrographs where Gctf detected signal at resolutions better than 4A were used in the reconstruction (~15%). |
Image scans | Movie frames/image: 40 / Used frames/image: 1-40 |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||
Helical symmerty | Angular rotation/subunit: -166.73 ° / Axial rise/subunit: 27.54 Å / Axial symmetry: C1 | ||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 67000 | ||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.54 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 67000 / Symmetry type: HELICAL | ||||||||||||||||||||||||||||
Atomic model building | Protocol: RIGID BODY FIT | ||||||||||||||||||||||||||||
Atomic model building | 3D fitting-ID: 1 / Source name: PDB / Type: experimental model
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