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- PDB-7yv9: Cryo-EM structure of full-length Myosin Va in the autoinhibited state -
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Open data
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Basic information
Entry | Database: PDB / ID: 7yv9 | ||||||
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Title | Cryo-EM structure of full-length Myosin Va in the autoinhibited state | ||||||
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![]() | MOTOR PROTEIN / intracellular trafficking / molecular motor / myosin / autoinhibition | ||||||
Function / homology | ![]() CaMK IV-mediated phosphorylation of CREB / Cam-PDE 1 activation / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Glycogen breakdown (glycogenolysis) / Activation of RAC1 downstream of NMDARs / Reduction of cytosolic Ca++ levels / Sodium/Calcium exchangers / Activation of Ca-permeable Kainate Receptor / CLEC7A (Dectin-1) induces NFAT activation / Synthesis of IP3 and IP4 in the cytosol ...CaMK IV-mediated phosphorylation of CREB / Cam-PDE 1 activation / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Glycogen breakdown (glycogenolysis) / Activation of RAC1 downstream of NMDARs / Reduction of cytosolic Ca++ levels / Sodium/Calcium exchangers / Activation of Ca-permeable Kainate Receptor / CLEC7A (Dectin-1) induces NFAT activation / Synthesis of IP3 and IP4 in the cytosol / RHO GTPases activate PAKs / Calmodulin induced events / Inactivation, recovery and regulation of the phototransduction cascade / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / Calcineurin activates NFAT / eNOS activation / Ion transport by P-type ATPases / Unblocking of NMDA receptors, glutamate binding and activation / Protein methylation / RAF activation / VEGFR2 mediated vascular permeability / RAS processing / Smooth Muscle Contraction / Ca2+ pathway / FCERI mediated Ca+2 mobilization / RHO GTPases activate IQGAPs / Extra-nuclear estrogen signaling / RAF/MAP kinase cascade / PKA activation / Platelet degranulation / Stimuli-sensing channels / Ion homeostasis / type 3 metabotropic glutamate receptor binding / myosin complex / organelle localization by membrane tethering / regulation of cardiac muscle cell action potential / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / nitric-oxide synthase binding / protein phosphatase activator activity / cytoskeletal motor activity / adenylate cyclase binding / catalytic complex / detection of calcium ion / regulation of cardiac muscle contraction / negative regulation of ryanodine-sensitive calcium-release channel activity / calcium channel inhibitor activity / cellular response to interferon-beta / phosphatidylinositol 3-kinase binding / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / positive regulation of protein dephosphorylation / regulation of ryanodine-sensitive calcium-release channel activity / titin binding / voltage-gated potassium channel complex / sperm midpiece / calcium channel complex / adenylate cyclase activator activity / nitric-oxide synthase regulator activity / regulation of heart rate / sarcomere / protein serine/threonine kinase activator activity / regulation of cytokinesis / positive regulation of receptor signaling pathway via JAK-STAT / spindle microtubule / cellular response to type II interferon / spindle pole / G2/M transition of mitotic cell cycle / calcium-dependent protein binding / myelin sheath / actin binding / growth cone / transmembrane transporter binding / protein domain specific binding / centrosome / calcium ion binding / protein kinase binding / nucleoplasm / ATP binding / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.78 Å | ||||||
![]() | Niu, F. / Wei, Z. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Autoinhibition and activation mechanisms revealed by the triangular-shaped structure of myosin Va. Authors: Fengfeng Niu / Yong Liu / Kang Sun / Shun Xu / Jiayuan Dong / Cong Yu / Kaige Yan / Zhiyi Wei / ![]() Abstract: As the prototype of unconventional myosin motor family, myosin Va (MyoVa) transport cellular cargos along actin filaments in diverse cellular processes. The off-duty MyoVa adopts a closed and ...As the prototype of unconventional myosin motor family, myosin Va (MyoVa) transport cellular cargos along actin filaments in diverse cellular processes. The off-duty MyoVa adopts a closed and autoinhibited state, which can be relieved by cargo binding. The molecular mechanisms governing the autoinhibition and activation of MyoVa remain unclear. Here, we report the cryo-electron microscopy structure of the two full-length, closed MyoVa heavy chains in complex with 12 calmodulin light chains at 4.78-Å resolution. The MyoVa adopts a triangular structure with multiple intra- and interpolypeptide chain interactions in establishing the closed state with cargo binding and adenosine triphosphatase activity inhibited. Structural, biochemical, and cellular analyses uncover an asymmetric autoinhibition mechanism, in which the cargo-binding sites in the two MyoVa heavy chains are differently protected. Thus, specific and efficient MyoVa activation requires coincident binding of multiple cargo adaptors, revealing an intricate and elegant activity regulation of the motor in response to cargos. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 920.6 KB | Display | ![]() |
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PDB format | ![]() | 715.3 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.5 MB | Display | ![]() |
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Full document | ![]() | 1.6 MB | Display | |
Data in XML | ![]() | 137.5 KB | Display | |
Data in CIF | ![]() | 201.1 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 34121MC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 212657.359 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #2: Protein | Mass: 16848.605 Da / Num. of mol.: 12 / Mutation: E32Q,E68Q,E105Q,E141Q Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Myosin Va and Calmodulin complex / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT | ||||||||||||||||||||||||||||||
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Molecular weight | Value: 0.63 MDa / Experimental value: NO | ||||||||||||||||||||||||||||||
Source (natural) | Organism: ![]() ![]() | ||||||||||||||||||||||||||||||
Source (recombinant) | Organism: ![]() ![]() | ||||||||||||||||||||||||||||||
Buffer solution | pH: 7.4 | ||||||||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid type: Quantifoil R1.2/1.3 | ||||||||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K |
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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: 81000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 1500 nm / Cs: 2.7 mm / Alignment procedure: BASIC |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 2 sec. / Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
EM software |
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CTF correction | Type: NONE | ||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 20747000 | ||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 4.78 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 160273 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | B value: 167.3 / Protocol: OTHER / Space: REAL / Target criteria: Correlation coefficient | ||||||||||||||||||||||||||||||||||||||||||||
Atomic model building |
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