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Open data
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Basic information
| Entry | ![]() | ||||||||||||
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| Title | Integrin alpha-5 beta-1 in complex with MINT1526A Fab | ||||||||||||
Map data | primary EM map | ||||||||||||
Sample |
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Keywords | Integrin / Antibody Fab / Inhibitory / SIGNALING PROTEIN | ||||||||||||
| Function / homology | Function and homology informationintegrin alpha8-beta1 complex / integrin alpha3-beta1 complex / integrin alpha5-beta1 complex / integrin alpha6-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 / myoblast fate specification / integrin alpha9-beta1 complex ...integrin alpha8-beta1 complex / integrin alpha3-beta1 complex / integrin alpha5-beta1 complex / integrin alpha6-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 / myoblast fate specification / integrin alpha9-beta1 complex / regulation of collagen catabolic process / cardiac cell fate specification / integrin alpha1-beta1 complex / integrin binding involved in cell-matrix adhesion / integrin alpha4-beta1 complex / cell-cell adhesion mediated by integrin / collagen binding involved in cell-matrix adhesion / integrin alpha2-beta1 complex / reactive gliosis / Localization of the PINCH-ILK-PARVIN complex to focal adhesions / formation of radial glial scaffolds / Other semaphorin interactions / cerebellar climbing fiber to Purkinje cell synapse / Formation of the ureteric bud / myelin sheath abaxonal region / CD40 signaling pathway / calcium-independent cell-matrix adhesion / Fibronectin matrix formation / positive regulation of fibroblast growth factor receptor signaling pathway / regulation of synapse pruning / integrin alphav-beta1 complex / CHL1 interactions / basement membrane organization / RUNX2 regulates genes involved in cell migration / cardiac muscle cell myoblast differentiation / MET interacts with TNS proteins / alphav-beta3 integrin-vitronectin complex / Laminin interactions / cardiac muscle cell differentiation / Platelet Adhesion to exposed collagen / germ cell migration / leukocyte tethering or rolling / vascular endothelial growth factor receptor 2 binding / cell projection organization / myoblast fusion / positive regulation of vascular endothelial growth factor signaling pathway / Elastic fibre formation / mesodermal cell differentiation / cell-substrate junction assembly / platelet-derived growth factor receptor binding / myoblast differentiation / axon extension / cell migration involved in sprouting angiogenesis / Differentiation of Keratinocytes in Interfollicular Epidermis in Mammalian Skin / positive regulation of vascular endothelial growth factor receptor signaling pathway / central nervous system neuron differentiation / positive regulation of cell-substrate adhesion / regulation of spontaneous synaptic transmission / heterophilic cell-cell adhesion / wound healing, spreading of epidermal cells / epidermal growth factor receptor binding / positive regulation of fibroblast migration / integrin complex / lamellipodium assembly / sarcomere organization / heterotypic cell-cell adhesion / MET activates PTK2 signaling / Molecules associated with elastic fibres / Basigin interactions / Mechanical load activates signaling by PIEZO1 and integrins in osteocytes / negative regulation of vasoconstriction / leukocyte cell-cell adhesion / muscle organ development / cell adhesion mediated by integrin / Syndecan interactions / positive regulation of wound healing / dendrite morphogenesis / negative regulation of neuron differentiation / positive regulation of neuroblast proliferation / negative regulation of Rho protein signal transduction / response to muscle activity / maintenance of blood-brain barrier / positive regulation of sprouting angiogenesis / cell-substrate adhesion / homophilic cell-cell adhesion / endodermal cell differentiation / TGF-beta receptor signaling activates SMADs / cleavage furrow / establishment of mitotic spindle orientation / fibronectin binding / negative regulation of anoikis / intercalated disc / cellular response to low-density lipoprotein particle stimulus / positive regulation of GTPase activity / RHOG GTPase cycle / glial cell projection / neuroblast proliferation / RAC2 GTPase cycle / RAC3 GTPase cycle / ECM proteoglycans Similarity search - Function | ||||||||||||
| Biological species | Homo sapiens (human) / unidentified (others) | ||||||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 2.7 Å | ||||||||||||
Authors | Nguyen A / Azumaya CM / Campbell MG | ||||||||||||
| Funding support | United States, 3 items
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Citation | Journal: bioRxiv / Year: 2025Title: Shared ligand-blocking mechanism but distinct conformational modulation by α5-targeting antibodies BIIG2 and MINT1526A. Authors: Adam Nguyen / Joel B Heim / Gabriele Cordara / Matthew C Chan / Hedda Johannesen / Cristine Charlesworth / Ming Li / Caleigh M Azumaya / Benjamin Madden / Ute Krengel / Alexander Meves / Melody G Campbell / ![]() Abstract: Integrins are heterodimeric receptors important for cell adhesion and signaling. Integrin α5β1 is a key mediator of angiogenesis and its dysregulation is associated with tumor progression and ...Integrins are heterodimeric receptors important for cell adhesion and signaling. Integrin α5β1 is a key mediator of angiogenesis and its dysregulation is associated with tumor progression and metastasis. Despite numerous efforts, α5β1-targeting therapeutics have been unsuccessful due to poor efficacy and off-target effects. A contributing factor is our limited understanding of how integrin conformation influences interactions with therapeutics. Using cell-based functional assays, patient derived xenografts, biophysics, and electron microscopy, we shed light on these relationships by characterizing two anti-α5β1 antibodies, BIIG2 and MINT1526A. We show that both antibodies bind α5β1 with nanomolar affinity, reduce angiogenesis , and bind overlapping epitopes that block fibronectin binding. However, using cryoEM, we reveal that while BIIG2 binding doesn't alter the conformational states, MINT1526A restricts α5β1's range of flexibility. These insights can guide which aspects to prioritize and improve the design of future integrin-targeted therapeutics. | ||||||||||||
| History |
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_44387.map.gz | 84.3 MB | EMDB map data format | |
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| Header (meta data) | emd-44387-v30.xml emd-44387.xml | 27.1 KB 27.1 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_44387_fsc.xml | 11.5 KB | Display | FSC data file |
| Images | emd_44387.png | 33.4 KB | ||
| Filedesc metadata | emd-44387.cif.gz | 8.3 KB | ||
| Others | emd_44387_additional_1.map.gz emd_44387_half_map_1.map.gz emd_44387_half_map_2.map.gz | 84.2 MB 154.3 MB 154.3 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-44387 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-44387 | HTTPS FTP |
-Validation report
| Summary document | emd_44387_validation.pdf.gz | 910.3 KB | Display | EMDB validaton report |
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| Full document | emd_44387_full_validation.pdf.gz | 909.9 KB | Display | |
| Data in XML | emd_44387_validation.xml.gz | 20.2 KB | Display | |
| Data in CIF | emd_44387_validation.cif.gz | 26.4 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-44387 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-44387 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9b9kMC ![]() 8r38C ![]() 9b9jC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_44387.map.gz / Format: CCP4 / Size: 166.4 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | primary EM map | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.122 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Additional map: Additional EM map
| File | emd_44387_additional_1.map | ||||||||||||
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| Annotation | Additional EM map | ||||||||||||
| Projections & Slices |
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| Density Histograms |
-Half map: primary EM map half B
| File | emd_44387_half_map_1.map | ||||||||||||
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| Annotation | primary EM map half B | ||||||||||||
| Projections & Slices |
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| Density Histograms |
-Half map: primary EM map half A
| File | emd_44387_half_map_2.map | ||||||||||||
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| Annotation | primary EM map half A | ||||||||||||
| Projections & Slices |
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| Density Histograms |
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Sample components
-Entire : Protein complex of integrin alpha-5 beta-1 with MINT1526A Fab
| Entire | Name: Protein complex of integrin alpha-5 beta-1 with MINT1526A Fab |
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| Components |
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-Supramolecule #1: Protein complex of integrin alpha-5 beta-1 with MINT1526A Fab
| Supramolecule | Name: Protein complex of integrin alpha-5 beta-1 with MINT1526A Fab type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4 |
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| Source (natural) | Organism: Homo sapiens (human) |
-Macromolecule #1: Integrin alpha-5 light chain
| Macromolecule | Name: Integrin alpha-5 light chain / type: protein_or_peptide / ID: 1 Details: Integrin alpha-5 ectodomain with cleaved linker, HRV 3C cute site, acid coil and Strep-Tag II. Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 108.693734 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MGSRTPESPL HAVQLRWGPR RRPPLLPLLL LLLPPPPRVG GFNLDAEAPA VLSGPPGSFF GFSVEFYRPG TDGVSVLVGA PKANTSQPG VLQGGAVYLC PWGASPTQCT PIEFDSKGSR LLESSLSSSE GEEPVEYKSL QWFGATVRAH GSSILACAPL Y SWRTEKEP ...String: MGSRTPESPL HAVQLRWGPR RRPPLLPLLL LLLPPPPRVG GFNLDAEAPA VLSGPPGSFF GFSVEFYRPG TDGVSVLVGA PKANTSQPG VLQGGAVYLC PWGASPTQCT PIEFDSKGSR LLESSLSSSE GEEPVEYKSL QWFGATVRAH GSSILACAPL Y SWRTEKEP LSDPVGTCYL STDNFTRILE YAPCRSDFSW AAGQGYCQGG FSAEFTKTGR VVLGGPGSYF WQGQILSATQ EQ IAESYYP EYLINLVQGQ LQTRQASSIY DDSYLGYSVA VGEFSGDDTE DFVAGVPKGN LTYGYVTILN GSDIRSLYNF SGE QMASYF GYAVAATDVN GDGLDDLLVG APLLMDRTPD GRPQEVGRVY VYLQHPAGIE PTPTLTLTGH DEFGRFGSSL TPLG DLDQD GYNDVAIGAP FGGETQQGVV FVFPGGPGGL GSKPSQVLQP LWAASHTPDF FGSALRGGRD LDGNGYPDLI VGSFG VDKA VVYRGRPIVS ASASLTIFPA MFNPEERSCS LEGNPVACIN LSFCLNASGK HVADSIGFTV ELQLDWQKQK GGVRRA LFL ASRQATLTQT LLIQNGARED CREMKIYLRN ESEFRDKLSP IHIALNFSLD PQAPVDSHGL RPALHYQSKS RIEDKAQ IL LDCGEDNICV PDLQLEVFGE QNHVYLGDKN ALNLTFHAQN VGEGGAYEAE LRVTAPPEAE YSGLVRHPGN FSSLSCDY F AVNQSRLLVC DLGNPMKAGA SLWGGLRFTV PHLRDTKKTI QFDFQILSKN LNNSQSDVVS FRLSVEAQAQ VTLNGVSKP EAVLFPVSDW HPRDQPQKEE DLGPAVHHVY ELINQGPSSI SQGVLELSCP QALEGQQLLY VTRVTGLNCT TNHPINPKGL ELDPEGSLH HQQKREAPSR SSASSGPQIL KCPEAECFRL RCELGPLHQQ ESQSLQLHFR VWAKTFLQRE HQPFSLQCEA V YKALKMPY RILPRQLPQK ERQVATAVQW TKAEGSY UniProtKB: Integrin alpha-5 |
-Macromolecule #2: Integrin beta-1
| Macromolecule | Name: Integrin beta-1 / type: protein_or_peptide / ID: 2 Details: Integrin beta-1 ectodomain with cleaved linker, HRV 3C cut site, base coil, and 6x His-tag. Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 80.653781 KDa |
| Recombinant expression | Organism: ![]() |
| Sequence | String: MNLQPIFWIG LISSVCCVFA QTDENRCLKA NAKSCGECIQ AGPNCGWCTN STFLQEGMPT SARCDDLEAL KKKGCPPDDI ENPRGSKDI KKNKNVTNRS KGTAEKLKPE DITQIQPQQL VLRLRSGEPQ TFTLKFKRAE DYPIDLYYLM DLSYSMKDDL E NVKSLGTD ...String: MNLQPIFWIG LISSVCCVFA QTDENRCLKA NAKSCGECIQ AGPNCGWCTN STFLQEGMPT SARCDDLEAL KKKGCPPDDI ENPRGSKDI KKNKNVTNRS KGTAEKLKPE DITQIQPQQL VLRLRSGEPQ TFTLKFKRAE DYPIDLYYLM DLSYSMKDDL E NVKSLGTD LMNEMRRITS DFRIGFGSFV EKTVMPYIST TPAKLRNPCT SEQNCTSPFS YKNVLSLTNK GEVFNELVGK QR ISGNLDS PEGGFDAIMQ VAVCGSLIGW RNVTRLLVFS TDAGFHFAGD GKLGGIVLPN DGQCHLENNM YTMSHYYDYP SIA HLVQKL SENNIQTIFA VTEEFQPVYK ELKNLIPKSA VGTLSANSSN VIQLIIDAYN SLSSEVILEN GKLSEGVTIS YKSY CKNGV NGTGENGRKC SNISIGDEVQ FEISITSNKC PKKDSDSFKI RPLGFTEEVE VILQYICECE CQSEGIPESP KCHEG NGTF ECGACRCNEG RVGRHCECST DEVNSEDMDA YCRKENSSEI CSNNGECVCG QCVCRKRDNT NEIYSGKFCE CDNFNC DRS NGLICGGNGV CKCRVCECNP NYTGSACDCS LDTSTCEASN GQICNGRGIC ECGVCKCTDP KFQGQTCEMC QTCLGVC AE HKECVQCRAF NKGEKKDTCT QECSYFNITK VESRDKLPQP VQPDPVSHCK EKDVDDCWFY FTYSVNGNNE VMVHVVEN P ECPTGPD UniProtKB: Integrin beta-1 |
-Macromolecule #3: MINT1526A Fab Heavy Chain
| Macromolecule | Name: MINT1526A Fab Heavy Chain / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: unidentified (others) |
| Molecular weight | Theoretical: 13.398053 KDa |
| Sequence | String: EVHLVESGGD LVQPGSSLKL SCAASGFTFS NRWLYWVKQA PGKGLEWVGG LKTKPNLYAT EYADSVKGRF TISRDDSKNS LYLQMNTLR VDDTALYYCT SLTGMRYFDY WGQGTMVTVS S |
-Macromolecule #4: MINT1526A Fab Light Chain
| Macromolecule | Name: MINT1526A Fab Light Chain / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO |
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| Source (natural) | Organism: unidentified (others) |
| Molecular weight | Theoretical: 11.978021 KDa |
| Sequence | String: LDVLTQSPSA SASLGNSVKL TCTLSSQHST YTIGWYQAGH PDKAPKYVMY LNSDGSHNKG DGLPDRFSGS SSGAHRYLSI SNIQPEDEA DYFCGSSYSS GYVFGSGTKV ELK |
-Macromolecule #9: CALCIUM ION
| Macromolecule | Name: CALCIUM ION / type: ligand / ID: 9 / Number of copies: 7 / Formula: CA |
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| Molecular weight | Theoretical: 40.078 Da |
-Macromolecule #10: 2-acetamido-2-deoxy-beta-D-glucopyranose
| Macromolecule | Name: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 10 / Number of copies: 1 / Formula: NAG |
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| Molecular weight | Theoretical: 221.208 Da |
| Chemical component information | ![]() ChemComp-NAG: |
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Concentration | 0.10 mg/mL | ||||||||||||
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| Buffer | pH: 7.4 Component:
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| Grid | Model: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 300 | ||||||||||||
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
| Microscope | TFS GLACIOS |
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| Image recording | Film or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 3079 / Average electron dose: 50.0 e/Å2 |
| Electron beam | Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 1.4000000000000001 µm / Nominal magnification: 36000 |
| Sample stage | Cooling holder cryogen: NITROGEN |
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Image processing
-Atomic model buiding 1
| Initial model |
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| Details | Initial local fitting was done using ChimeraX and then Phenix, ISOLDE and COOT for flexible fitting and modeling. | ||||||
| Refinement | Space: REAL / Protocol: RIGID BODY FIT / Overall B value: 106.4 / Target criteria: Cross-correlation coefficient | ||||||
| Output model | ![]() PDB-9b9k: |
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About Yorodumi




Keywords
Homo sapiens (human)
Authors
United States, 3 items
Citation



















Z (Sec.)
Y (Row.)
X (Col.)














































FIELD EMISSION GUN

