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- PDB-7nxd: Cryo-EM structure of human integrin alpha5beta1 in the half-bent ... -

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Basic information

Entry
Database: PDB / ID: 7nxd
TitleCryo-EM structure of human integrin alpha5beta1 in the half-bent conformation
Components
  • Integrin alpha-5
  • Integrin beta-1
KeywordsCELL ADHESION / integrin / plasma membrane protein / a5b1 / alpha5beta1 / focal adhesion / half-bent conformation
Function / homology
Function and homology information


integrin alpha8-beta1 complex / myoblast fate specification / integrin alpha3-beta1 complex / integrin alpha5-beta1 complex / integrin alpha7-beta1 complex / integrin alpha10-beta1 complex / integrin alpha11-beta1 complex / positive regulation of glutamate uptake involved in transmission of nerve impulse / regulation of inward rectifier potassium channel activity / regulation of collagen catabolic process ...integrin alpha8-beta1 complex / myoblast fate specification / integrin alpha3-beta1 complex / integrin alpha5-beta1 complex / integrin alpha7-beta1 complex / integrin alpha10-beta1 complex / integrin alpha11-beta1 complex / positive regulation of glutamate uptake involved in transmission of nerve impulse / regulation of inward rectifier potassium channel activity / regulation of collagen catabolic process / integrin alpha9-beta1 complex / integrin alpha4-beta1 complex / cardiac cell fate specification / integrin binding involved in cell-matrix adhesion / cell-cell adhesion mediated by integrin / C-X3-C chemokine binding / integrin alpha1-beta1 complex / regulation of synapse pruning / collagen binding involved in cell-matrix adhesion / integrin alpha2-beta1 complex / Localization of the PINCH-ILK-PARVIN complex to focal adhesions / reactive gliosis / cerebellar climbing fiber to Purkinje cell synapse / formation of radial glial scaffolds / Other semaphorin interactions / Formation of the ureteric bud / CD40 signaling pathway / positive regulation of vascular endothelial growth factor signaling pathway / integrin alphav-beta1 complex / calcium-independent cell-matrix adhesion / positive regulation of fibroblast growth factor receptor signaling pathway / Fibronectin matrix formation / basement membrane organization / myelin sheath abaxonal region / alphav-beta3 integrin-vitronectin complex / CHL1 interactions / cardiac muscle cell myoblast differentiation / Laminin interactions / RUNX2 regulates genes involved in cell migration / MET interacts with TNS proteins / germ cell migration / leukocyte tethering or rolling / cardiac muscle cell differentiation / cell projection organization / Platelet Adhesion to exposed collagen / vascular endothelial growth factor receptor 2 binding / myoblast fusion / Elastic fibre formation / mesodermal cell differentiation / cell-substrate junction assembly / platelet-derived growth factor receptor binding / axon extension / positive regulation of fibroblast migration / positive regulation of vascular endothelial growth factor receptor signaling pathway / cell migration involved in sprouting angiogenesis / wound healing, spreading of epidermal cells / regulation of spontaneous synaptic transmission / myoblast differentiation / heterotypic cell-cell adhesion / integrin complex / positive regulation of cell-substrate adhesion / dendrite morphogenesis / Basigin interactions / Molecules associated with elastic fibres / muscle organ development / negative regulation of Rho protein signal transduction / lamellipodium assembly / heterophilic cell-cell adhesion via plasma membrane cell adhesion molecules / MET activates PTK2 signaling / negative regulation of vasoconstriction / cell adhesion mediated by integrin / Syndecan interactions / leukocyte cell-cell adhesion / epidermal growth factor receptor binding / positive regulation of wound healing / maintenance of blood-brain barrier / positive regulation of neuroblast proliferation / sarcomere organization / cell-substrate adhesion / positive regulation of sprouting angiogenesis / endodermal cell differentiation / homophilic cell adhesion via plasma membrane adhesion molecules / TGF-beta receptor signaling activates SMADs / establishment of mitotic spindle orientation / cleavage furrow / glial cell projection / cellular response to low-density lipoprotein particle stimulus / fibronectin binding / negative regulation of anoikis / intercalated disc / RHOG GTPase cycle / negative regulation of neuron differentiation / ECM proteoglycans / neuroblast proliferation / RAC2 GTPase cycle / RAC3 GTPase cycle / Integrin cell surface interactions / cellular defense response / coreceptor activity / phagocytosis
Similarity search - Function
Integrin beta, epidermal growth factor-like domain 1 / Integrin beta epidermal growth factor like domain 1 / Integrin beta subunit, cytoplasmic domain / Integrin beta cytoplasmic domain / Integrin_b_cyt / : / Integrin alpha Ig-like domain 3 / Integrin beta tail domain / Integrin beta subunit, tail / Integrin beta tail domain superfamily ...Integrin beta, epidermal growth factor-like domain 1 / Integrin beta epidermal growth factor like domain 1 / Integrin beta subunit, cytoplasmic domain / Integrin beta cytoplasmic domain / Integrin_b_cyt / : / Integrin alpha Ig-like domain 3 / Integrin beta tail domain / Integrin beta subunit, tail / Integrin beta tail domain superfamily / Integrin_B_tail / Integrin beta subunit, VWA domain / Integrin beta subunit / Integrin beta N-terminal / Integrin beta chain VWA domain / Integrin plexin domain / Integrins beta chain cysteine-rich domain signature. / Integrin beta subunits (N-terminal portion of extracellular region) / EGF-like domain, extracellular / EGF-like domain / Integrin alpha-2 / Integrin alpha Ig-like domain 1 / : / Integrin alpha Ig-like domain 2 / Integrin alpha chain / Integrin alpha beta-propellor / Integrin alpha chain, C-terminal cytoplasmic region, conserved site / Integrins alpha chain signature. / FG-GAP repeat profile. / Integrin alpha (beta-propellor repeats). / FG-GAP repeat / FG-GAP repeat / Integrin alpha, N-terminal / Integrin domain superfamily / PSI domain / domain found in Plexins, Semaphorins and Integrins / von Willebrand factor A-like domain superfamily / EGF-like domain signature 1.
Similarity search - Domain/homology
Integrin beta-1 / Integrin alpha-5
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.6 Å
AuthorsSchumacher, S. / Dedden, D. / Vazquez Nunez, R. / Matoba, K. / Takagi, J. / Biertumpfel, C. / Mizuno, N.
Funding support Germany, European Union, United States, 6items
OrganizationGrant numberCountry
Max Planck Society Germany
Other privateBoehringer Ingelheim Foundation Plus 3 Program Germany
European Research Council (ERC)ERC-CoG 724209European Union
European Molecular Biology Organization (EMBO)Young Investigator ProgramEuropean Union
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI) United States
National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS) United States
CitationJournal: Sci Adv / Year: 2021
Title: Structural insights into integrin αβ opening by fibronectin ligand.
Authors: Stephanie Schumacher / Dirk Dedden / Roberto Vazquez Nunez / Kyoko Matoba / Junichi Takagi / Christian Biertümpfel / Naoko Mizuno /
Abstract: Integrin αβ is a major fibronectin receptor critical for cell migration. Upon complex formation, fibronectin and αβ undergo conformational changes. While this is key for cell-tissue connections, ...Integrin αβ is a major fibronectin receptor critical for cell migration. Upon complex formation, fibronectin and αβ undergo conformational changes. While this is key for cell-tissue connections, its mechanism is unknown. Here, we report cryo-electron microscopy structures of native human αβ with fibronectin to 3.1-angstrom resolution, and in its resting state to 4.6-angstrom resolution. The αβ-fibronectin complex revealed simultaneous interactions at the arginine-glycine-aspartate loop, the synergy site, and a newly identified binding site proximal to adjacent to metal ion-dependent adhesion site, inducing the translocation of helix α1 to secure integrin opening. Resting αβ adopts an incompletely bent conformation, challenging the model of integrin sharp bending inhibiting ligand binding. Our biochemical and structural analyses showed that affinity of αβ for fibronectin is increased with manganese ions (Mn) while adopting the half-bent conformation, indicating that ligand-binding affinity does not depend on conformation, and αβ opening is induced by ligand-binding.
History
DepositionMar 18, 2021Deposition site: PDBE / Processing site: PDBE
Revision 1.0Aug 25, 2021Provider: repository / Type: Initial release

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Structure visualization

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Assembly

Deposited unit
A: Integrin alpha-5
B: Integrin beta-1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)204,74225
Polymers196,4502
Non-polymers8,29223
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area12970 Å2
ΔGint25 kcal/mol
Surface area87090 Å2
MethodPISA

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Components

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Protein , 2 types, 2 molecules AB

#1: Protein Integrin alpha-5 / CD49 antigen-like family member E / Fibronectin receptor subunit alpha / Integrin alpha-F / VLA-5


Mass: 110111.555 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Sequence used from GenBank entry CAA30790 / Source: (natural) Homo sapiens (human) / Tissue: placenta / References: UniProt: P08648
#2: Protein Integrin beta-1 / Fibronectin receptor subunit beta / Glycoprotein IIa / GPIIA / VLA-4 subunit beta


Mass: 86338.594 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Sequence used from GenBank entry CAA30790 / Source: (natural) Homo sapiens (human) / Tissue: placenta / References: UniProt: P05556

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Sugars , 5 types, 15 molecules

#3: 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


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 5
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}}}LINUCSPDB-CARE
#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


Type: oligosaccharide / Mass: 748.682 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}}}}}LINUCSPDB-CARE
#5: Polysaccharide
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 7
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#6: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[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


Type: oligosaccharide / Mass: 1114.016 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-2DManpa1-6[DManpa1-3]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}[(6+1)][a-D-Manp]{[(2+1)][b-D-GlcpNAc]{}}}}}}LINUCSPDB-CARE
#8: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 2 types, 8 molecules

#7: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 7
Source method: isolated from a genetically manipulated source
Formula: Ca
#9: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg

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Details

Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Dimeric complex of integrin a5b1 / Type: COMPLEX / Entity ID: #1-#2 / Source: NATURAL
Molecular weightValue: 0.2 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Buffer solutionpH: 7.5
Buffer component
IDConc.NameFormulaBuffer-ID
150 mMtris(hydroxymethyl)aminomethaneTris1
2150 mMsodium chlorideNaCl1
31 mMmanganese chlorideMgCl21
41 mMcalcium chlorideCaCl21
SpecimenConc.: 0.15 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Details: Integrin a5b1 was assembled into MSPE3D1 nanodiscs that contained bovine brain lipids (Folch fraction I) at a ratio of 1:29:3460, respectively. The assembly mix was incubated with SM-2 ...Details: Integrin a5b1 was assembled into MSPE3D1 nanodiscs that contained bovine brain lipids (Folch fraction I) at a ratio of 1:29:3460, respectively. The assembly mix was incubated with SM-2 BioBeads to remove DDM detergent from solubilized lipids and then purified by size-exclusion chromatography using a Superose 6 3.2/300 column.
Specimen supportDetails: GloQube 20 mA / Grid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE-PROPANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 105000 X / Nominal defocus max: 3200 nm / Nominal defocus min: -500 nm / Cs: 2.62 mm / C2 aperture diameter: 70 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recording

Imaging-ID: 1 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1

IDAverage exposure time (sec.)Electron dose (e/Å2)Num. of real imagesDetails
17.3965.81829movie: 20 frames/image dose per frame: 3.13 e-/A2
22.582.3989movie: 50 frames/image dose per frame: 1.65 e-/A2
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV

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Processing

SoftwareName: PHENIX / Version: 1.17.1_3660: / Classification: refinement
EM software
IDNameVersionCategory
2SerialEMimage acquisition
4GctfCTF correction
7UCSF Chimeramodel fitting
8Cootmodel fitting
10cryoSPARCinitial Euler assignment
11RELION3final Euler assignment
12RELION3classification
13RELION33D reconstruction
14Cootmodel refinement
15PHENIX1.17.1 Release 3660model refinement
Image processingDetails: initial image processing automatically by FOCUS pipeline: gain normalization, motion correction and dose-weighting in MotionCor2 CTF estimation by GCTF
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 496356
Details: 1424 particles were manually picked and used to obtain 2D classes with distinct features as templates for Gautomatch
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 4.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 98750 / Algorithm: FOURIER SPACE / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model building
IDPDB-IDPdb chain-ID 3D fitting-ID
14WK0

4wk0

A1
24WK0

4wk0

B1
33VI3

3vi3

A1
43VI3

3vi3

B1
53FCS

3fcs

A1
63FCS

3fcs

B1
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 386.66 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.01313052
ELECTRON MICROSCOPYf_angle_d1.4817680
ELECTRON MICROSCOPYf_dihedral_angle_d16.5574907
ELECTRON MICROSCOPYf_chiral_restr0.1942037
ELECTRON MICROSCOPYf_plane_restr0.0292296

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