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- PDB-8tcf: Integrin alpha-v beta-8 in complex with minibinder B8_BP_dsulf -

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Basic information

Entry
Database: PDB / ID: 8tcf
TitleIntegrin alpha-v beta-8 in complex with minibinder B8_BP_dsulf
Components
  • Integrin alpha-V heavy chainIntegrin alpha V
  • Integrin beta-8
  • Minibinder B8_BP_dslf
KeywordsDE NOVO PROTEIN / Complex / heterodimer / signaling / TGF-Beta
Function / homology
Function and homology information


ganglioside metabolic process / Langerhans cell differentiation / integrin alphav-beta6 complex / integrin alphav-beta8 complex / hard palate development / transforming growth factor beta production / negative regulation of entry of bacterium into host cell / integrin alphav-beta5 complex / : / opsonin binding ...ganglioside metabolic process / Langerhans cell differentiation / integrin alphav-beta6 complex / integrin alphav-beta8 complex / hard palate development / transforming growth factor beta production / negative regulation of entry of bacterium into host cell / integrin alphav-beta5 complex / : / opsonin binding / integrin alphav-beta1 complex / Cross-presentation of particulate exogenous antigens (phagosomes) / extracellular matrix protein binding / Laminin interactions / placenta blood vessel development / integrin alphav-beta3 complex / negative regulation of lipoprotein metabolic process / entry into host cell by a symbiont-containing vacuole / alphav-beta3 integrin-PKCalpha complex / alphav-beta3 integrin-HMGB1 complex / negative regulation of lipid transport / negative regulation of low-density lipoprotein receptor activity / Elastic fibre formation / regulation of phagocytosis / alphav-beta3 integrin-IGF-1-IGF1R complex / transforming growth factor beta binding / filopodium membrane / positive regulation of small GTPase mediated signal transduction / extracellular matrix binding / apolipoprotein A-I-mediated signaling pathway / wound healing, spreading of epidermal cells / apoptotic cell clearance / cartilage development / heterotypic cell-cell adhesion / integrin complex / Molecules associated with elastic fibres / positive regulation of intracellular signal transduction / cell adhesion mediated by integrin / microvillus membrane / Syndecan interactions / negative chemotaxis / cell-substrate adhesion / endodermal cell differentiation / positive regulation of osteoblast proliferation / TGF-beta receptor signaling activates SMADs / PECAM1 interactions / lamellipodium membrane / negative regulation of macrophage derived foam cell differentiation / negative regulation of lipid storage / fibronectin binding / positive regulation of cell adhesion / ECM proteoglycans / voltage-gated calcium channel activity / vasculogenesis / Integrin cell surface interactions / specific granule membrane / coreceptor activity / phagocytic vesicle / extrinsic apoptotic signaling pathway in absence of ligand / ERK1 and ERK2 cascade / substrate adhesion-dependent cell spreading / cell-matrix adhesion / transforming growth factor beta receptor signaling pathway / protein kinase C binding / Signal transduction by L1 / integrin-mediated signaling pathway / negative regulation of extrinsic apoptotic signaling pathway / calcium ion transmembrane transport / response to virus / cell-cell adhesion / ruffle membrane / VEGFA-VEGFR2 Pathway / positive regulation of angiogenesis / cell migration / integrin binding / virus receptor activity / positive regulation of cytosolic calcium ion concentration / angiogenesis / protease binding / cell adhesion / positive regulation of cell migration / immune response / symbiont entry into host cell / external side of plasma membrane / negative regulation of gene expression / focal adhesion / positive regulation of cell population proliferation / Neutrophil degranulation / positive regulation of gene expression / cell surface / extracellular exosome / membrane / metal ion binding / plasma membrane / cytosol
Similarity search - Function
: / Integrin alpha Ig-like domain 3 / 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) / Integrin alpha cytoplasmic region ...: / Integrin alpha Ig-like domain 3 / 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) / Integrin alpha cytoplasmic 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 domain superfamily / Integrin alpha, N-terminal / PSI domain / domain found in Plexins, Semaphorins and Integrins / von Willebrand factor A-like domain superfamily / EGF-like domain signature 2. / EGF-like domain signature 1. / EGF-like domain
Similarity search - Domain/homology
Integrin alpha-V / Integrin beta-8
Similarity search - Component
Biological speciesHomo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsCampbell, M.G. / Fernandez, A. / Roy, A. / Kraft, J. / Baker, D.
Funding support United States, 5items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35 GM147414 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01 GM092802 United States
The Pew Charitable Trusts United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM008268-33 United States
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Nat Commun / Year: 2023
Title: De novo design of highly selective miniprotein inhibitors of integrins αvβ6 and αvβ8.
Authors: Anindya Roy / Lei Shi / Ashley Chang / Xianchi Dong / Andres Fernandez / John C Kraft / Jing Li / Viet Q Le / Rebecca Viazzo Winegar / Gerald Maxwell Cherf / Dean Slocum / P Daniel Poulson / ...Authors: Anindya Roy / Lei Shi / Ashley Chang / Xianchi Dong / Andres Fernandez / John C Kraft / Jing Li / Viet Q Le / Rebecca Viazzo Winegar / Gerald Maxwell Cherf / Dean Slocum / P Daniel Poulson / Garrett E Casper / Mary L Vallecillo-Zúniga / Jonard Corpuz Valdoz / Marcos C Miranda / Hua Bai / Yakov Kipnis / Audrey Olshefsky / Tanu Priya / Lauren Carter / Rashmi Ravichandran / Cameron M Chow / Max R Johnson / Suna Cheng / McKaela Smith / Catherine Overed-Sayer / Donna K Finch / David Lowe / Asim K Bera / Gustavo Matute-Bello / Timothy P Birkland / Frank DiMaio / Ganesh Raghu / Jennifer R Cochran / Lance J Stewart / Melody G Campbell / Pam M Van Ry / Timothy Springer / David Baker /
Abstract: The RGD (Arg-Gly-Asp)-binding integrins αvβ6 and αvβ8 are clinically validated cancer and fibrosis targets of considerable therapeutic importance. Compounds that can discriminate between ...The RGD (Arg-Gly-Asp)-binding integrins αvβ6 and αvβ8 are clinically validated cancer and fibrosis targets of considerable therapeutic importance. Compounds that can discriminate between homologous αvβ6 and αvβ8 and other RGD integrins, stabilize specific conformational states, and have high thermal stability could have considerable therapeutic utility. Existing small molecule and antibody inhibitors do not have all these properties, and hence new approaches are needed. Here we describe a generalized method for computationally designing RGD-containing miniproteins selective for a single RGD integrin heterodimer and conformational state. We design hyperstable, selective αvβ6 and αvβ8 inhibitors that bind with picomolar affinity. CryoEM structures of the designed inhibitor-integrin complexes are very close to the computational design models, and show that the inhibitors stabilize specific conformational states of the αvβ6 and the αvβ8 integrins. In a lung fibrosis mouse model, the αvβ6 inhibitor potently reduced fibrotic burden and improved overall lung mechanics, demonstrating the therapeutic potential of de novo designed integrin binding proteins with high selectivity.
History
DepositionJun 30, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 27, 2023Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Integrin alpha-V heavy chain
B: Integrin beta-8
C: Minibinder B8_BP_dslf
hetero molecules


Theoretical massNumber of molelcules
Total (without water)100,61717
Polymers97,1613
Non-polymers3,45614
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 3 types, 3 molecules ABC

#1: Protein Integrin alpha-V heavy chain / Integrin alpha V


Mass: 48310.520 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ITGAV, MSK8, VNRA, VTNR / Production host: Cricetulus griseus (Chinese hamster) / References: UniProt: P06756
#2: Protein Integrin beta-8


Mass: 40267.992 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ITGB8 / Production host: Cricetulus griseus (Chinese hamster) / References: UniProt: P26012
#3: Protein Minibinder B8_BP_dslf


Mass: 8582.782 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) synthetic construct (others) / Production host: Escherichia coli (E. coli)

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Sugars , 3 types, 8 molecules

#4: Polysaccharide alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1072.964 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-2DManpa1-3[DManpa1-6]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,6,5/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3-3/a4-b1_b4-c1_c3-d1_c6-f1_d2-e1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][a-D-Manp]{}}[(6+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.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam 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
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#7: 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 / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 4 / 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, 6 molecules

#6: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: Ca
#8: 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: Ternary complex of integrin heterodimer (alpha-v beta-8) and the de novo minibinder protein B8_BP_dslf
Type: COMPLEX
Details: Integrin expressed in expiCHO cells, minibinder expressed in e. coli
Entity ID: #1-#3 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Cricetulus griseus (Chinese hamster) / Strain: expiCHO
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

MicroscopyModel: TFS GLACIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 1800 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

Image processingDetails: Movies were collected in super resolution and gain corrected
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 116587 / Symmetry type: POINT

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