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- PDB-4cak: Three-dimensional reconstruction of intact human integrin alphaII... -
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Basic information
Entry | Database: PDB / ID: 4cak | ||||||||||||
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Title | Three-dimensional reconstruction of intact human integrin alphaIIbbeta3 in a phospholipid bilayer nanodisc | ||||||||||||
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![]() | CELL ADHESION / INTEGRIN / SINGLE PARTICLE RECONSTRUCTION | ||||||||||||
Function / homology | ![]() tube development / regulation of serotonin uptake / positive regulation of adenylate cyclase-inhibiting opioid receptor signaling pathway / alpha9-beta1 integrin-ADAM8 complex / regulation of trophoblast cell migration / integrin alphaIIb-beta3 complex / regulation of postsynaptic neurotransmitter receptor diffusion trapping / maintenance of postsynaptic specialization structure / alphav-beta3 integrin-vitronectin complex / regulation of extracellular matrix organization ...tube development / regulation of serotonin uptake / positive regulation of adenylate cyclase-inhibiting opioid receptor signaling pathway / alpha9-beta1 integrin-ADAM8 complex / regulation of trophoblast cell migration / integrin alphaIIb-beta3 complex / regulation of postsynaptic neurotransmitter receptor diffusion trapping / maintenance of postsynaptic specialization structure / alphav-beta3 integrin-vitronectin complex / regulation of extracellular matrix organization / positive regulation of glomerular mesangial cell proliferation / platelet alpha granule membrane / negative regulation of lipoprotein metabolic process / integrin alphav-beta3 complex / alphav-beta3 integrin-PKCalpha complex / fibrinogen binding / alphav-beta3 integrin-HMGB1 complex / blood coagulation, fibrin clot formation / glycinergic synapse / vascular endothelial growth factor receptor 2 binding / negative regulation of lipid transport / positive regulation of vascular endothelial growth factor signaling pathway / : / regulation of release of sequestered calcium ion into cytosol / Elastic fibre formation / mesodermal cell differentiation / cell-substrate junction assembly / alphav-beta3 integrin-IGF-1-IGF1R complex / platelet-derived growth factor receptor binding / angiogenesis involved in wound healing / filopodium membrane / extracellular matrix binding / positive regulation of fibroblast migration / positive regulation of vascular endothelial growth factor receptor signaling pathway / regulation of bone resorption / apolipoprotein A-I-mediated signaling pathway / positive regulation of cell adhesion mediated by integrin / positive regulation of leukocyte migration / apoptotic cell clearance / wound healing, spreading of epidermal cells / integrin complex / heterotypic cell-cell adhesion / smooth muscle cell migration / Molecules associated with elastic fibres / Mechanical load activates signaling by PIEZO1 and integrins in osteocytes / positive regulation of cell-matrix adhesion / negative chemotaxis / cell adhesion mediated by integrin / cellular response to insulin-like growth factor stimulus / Syndecan interactions / microvillus membrane / p130Cas linkage to MAPK signaling for integrins / positive regulation of smooth muscle cell migration / regulation of postsynaptic neurotransmitter receptor internalization / protein disulfide isomerase activity / cell-substrate adhesion / positive regulation of osteoblast proliferation / PECAM1 interactions / TGF-beta receptor signaling activates SMADs / GRB2:SOS provides linkage to MAPK signaling for Integrins / lamellipodium membrane / platelet-derived growth factor receptor signaling pathway / fibronectin binding / negative regulation of macrophage derived foam cell differentiation / negative regulation of lipid storage / ECM proteoglycans / Integrin cell surface interactions / positive regulation of bone resorption / positive regulation of T cell migration / negative regulation of endothelial cell apoptotic process / coreceptor activity / cell adhesion molecule binding / cellular response to platelet-derived growth factor stimulus / positive regulation of endothelial cell proliferation / positive regulation of substrate adhesion-dependent cell spreading / positive regulation of endothelial cell migration / Integrin signaling / embryo implantation / substrate adhesion-dependent cell spreading / protein kinase C binding / Turbulent (oscillatory, disturbed) flow shear stress activates signaling by PIEZO1 and integrins in endothelial cells / cell-matrix adhesion / Signal transduction by L1 / response to activity / integrin-mediated signaling pathway / regulation of actin cytoskeleton organization / positive regulation of smooth muscle cell proliferation / wound healing / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / Signaling by high-kinase activity BRAF mutants / MAP2K and MAPK activation / cell-cell adhesion / platelet activation / VEGFA-VEGFR2 Pathway / platelet aggregation / ruffle membrane / cellular response to mechanical stimulus / positive regulation of fibroblast proliferation / positive regulation of angiogenesis / Signaling by RAF1 mutants Similarity search - Function | ||||||||||||
Biological species | ![]() | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / negative staining / Resolution: 20.5 Å | ||||||||||||
![]() | Choi, W.S. / Rice, W.J. / Stokes, D.L. / Coller, B.S. | ||||||||||||
![]() | ![]() Title: Three-dimensional reconstruction of intact human integrin αIIbβ3: new implications for activation-dependent ligand binding. Authors: Won-Seok Choi / William J Rice / David L Stokes / Barry S Coller / ![]() Abstract: Integrin αIIbβ3 plays a central role in hemostasis and thrombosis. We provide the first 3-dimensional reconstruction of intact purified αIIbβ3 in a nanodisc lipid bilayer. Unlike previous models, ...Integrin αIIbβ3 plays a central role in hemostasis and thrombosis. We provide the first 3-dimensional reconstruction of intact purified αIIbβ3 in a nanodisc lipid bilayer. Unlike previous models, it shows that the ligand-binding head domain is on top, pointing away from the membrane. Moreover, unlike the crystal structure of the recombinant ectodomain, the lower legs are not parallel, straight, and adjacent. Rather, the αIIb lower leg is bent between the calf-1 and calf-2 domains and the β3 Integrin-Epidermal Growth Factor (I-EGF) 2 to 4 domains are freely coiled rather than in a cleft between the β3 headpiece and the αIIb lower leg. Our data indicate an important role for the region that links the distal calf-2 and β-tail domains to their respective transmembrane (TM) domains in transmitting the conformational changes in the TM domains associated with inside-out activation. | ||||||||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 432.6 KB | Display | ![]() |
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PDB format | ![]() | 299.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 2281MC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Protein , 2 types, 2 molecules AB
#1: Protein | Mass: 104460.719 Da / Num. of mol.: 1 / Fragment: ECTODOMAIN, UNP RESIDUES 32-990 / Source method: isolated from a natural source / Details: FITTED FROM PDB ID 3FCS / Source: (natural) ![]() |
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#2: Protein | Mass: 76316.945 Da / Num. of mol.: 1 / Fragment: RESIDUES 27-716 / Source method: isolated from a natural source / Details: FITTED FROM PDB ID 3FCS / Source: (natural) ![]() |
-Sugars , 5 types, 7 molecules 
#3: Polysaccharide | Source method: isolated from a genetically manipulated source #4: Polysaccharide | alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1- ...alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | Source method: isolated from a genetically manipulated source #5: Polysaccharide | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | Source method: isolated from a genetically manipulated source #6: Polysaccharide | alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | Source method: isolated from a genetically manipulated source #7: Sugar | |
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-Details
Has protein modification | Y |
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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: INTEGRIN ALPHAIIBBETA3 IN LIPID BILAYER NANODISC / Type: COMPLEX / Details: MICROGRAPHS TAKEN ON CCD |
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Buffer solution | Name: 150 MM NACL, 10 MM HEPES, PH 7.4, 1 MM CACL2 AND 1 MM MGCL2 pH: 7.4 Details: 150 MM NACL, 10 MM HEPES, PH 7.4, 1 MM CACL2 AND 1 MM MGCL2 |
Specimen | Conc.: 0.02 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: YES / Vitrification applied: NO |
EM staining | Type: NEGATIVE / Material: uranyl acetate |
Specimen support | Details: CARBON |
Vitrification | Details: VITRIFICATION 1 -- CRYOGEN- NONE, INSTRUMENT- NONE, |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Tecnai F20 / Image courtesy: FEI Company |
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Microscopy | Model: FEI TECNAI F20 / Date: Feb 1, 2010 Details: LOW DOSE PACKAGE USED. CCD MAGNIFICATION IS 1.76 TIMES FILM MAGNIFICATION |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 29000 X / Calibrated magnification: 50592 X / Nominal defocus max: 1500 nm / Nominal defocus min: 1200 nm / Cs: 2 mm |
Specimen holder | Tilt angle max: 50 ° / Tilt angle min: 0 ° |
Image recording | Electron dose: 13 e/Å2 / Film or detector model: GENERIC TVIPS (4k x 4k) |
Image scans | Num. digital images: 1500 |
Radiation wavelength | Relative weight: 1 |
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Processing
EM software |
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Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||
3D reconstruction | Method: RANDOM CONICAL TILT THEN REFERENCE BASED RECONSTRUCTION Resolution: 20.5 Å / Num. of particles: 25008 / Nominal pixel size: 2.96 Å / Actual pixel size: 2.96 Å / Magnification calibration: 23A LAYERLINE OF TMV Details: INITIAL MODEL FROM RANDOM CONICAL TILT FOLLOWED BY REFERENCE BASED REFINEMENT PDB FILE 3FCS WAS SPLIT INTO 20 SUBDOMAINS. THESE SUBDOMAINS WERE MANUALLY FITTED INTO THE EM VOLUME SUBMISSION ...Details: INITIAL MODEL FROM RANDOM CONICAL TILT FOLLOWED BY REFERENCE BASED REFINEMENT PDB FILE 3FCS WAS SPLIT INTO 20 SUBDOMAINS. THESE SUBDOMAINS WERE MANUALLY FITTED INTO THE EM VOLUME SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2281. (DEPOSITION ID: 11378). Symmetry type: POINT | ||||||||||||
Atomic model building | Protocol: RIGID BODY FIT / Space: REAL / Target criteria: Cross-correlation coefficient / Details: METHOD--RIGID BODY REFINEMENT PROTOCOL--X-RAY | ||||||||||||
Atomic model building | PDB-ID: 3FCS Accession code: 3FCS / Source name: PDB / Type: experimental model | ||||||||||||
Refinement | Highest resolution: 20.5 Å | ||||||||||||
Refinement step | Cycle: LAST / Highest resolution: 20.5 Å
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