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Open data
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Basic information
Entry | Database: PDB / ID: 8dp0 | ||||||
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Title | Structure of p110 gamma bound to the Ras inhibitory nanobody NB7 | ||||||
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![]() | TRANSFERASE/IMMUNE SYSTEM / PI3K / p110 / PIK3CG / phosphoinositide 3-kinase / PIP3 / TRANSFERASE-IMMUNE SYSTEM complex | ||||||
Function / homology | ![]() secretory granule localization / negative regulation of triglyceride catabolic process / natural killer cell chemotaxis / neutrophil extravasation / phosphatidylinositol-4-phosphate 3-kinase / positive regulation of acute inflammatory response / respiratory burst involved in defense response / negative regulation of cardiac muscle contraction / regulation of calcium ion transmembrane transport / T cell chemotaxis ...secretory granule localization / negative regulation of triglyceride catabolic process / natural killer cell chemotaxis / neutrophil extravasation / phosphatidylinositol-4-phosphate 3-kinase / positive regulation of acute inflammatory response / respiratory burst involved in defense response / negative regulation of cardiac muscle contraction / regulation of calcium ion transmembrane transport / T cell chemotaxis / negative regulation of fibroblast apoptotic process / phosphatidylinositol 3-kinase complex, class IB / sphingosine-1-phosphate receptor signaling pathway / phosphatidylinositol 3-kinase complex, class IA / dendritic cell chemotaxis / 1-phosphatidylinositol-4-phosphate 3-kinase activity / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / phosphatidylinositol-4,5-bisphosphate 3-kinase / phosphatidylinositol 3-kinase / phosphatidylinositol-3-phosphate biosynthetic process / 1-phosphatidylinositol-3-kinase activity / mast cell degranulation / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / hepatocyte apoptotic process / positive regulation of Rac protein signal transduction / regulation of cell adhesion mediated by integrin / Synthesis of PIPs at the plasma membrane / phosphatidylinositol-mediated signaling / phosphatidylinositol phosphate biosynthetic process / regulation of angiogenesis / T cell proliferation / cellular response to cAMP / GPVI-mediated activation cascade / T cell activation / ephrin receptor binding / positive regulation of endothelial cell migration / phosphatidylinositol 3-kinase/protein kinase B signal transduction / neutrophil chemotaxis / positive regulation of cytokine production / positive regulation of MAP kinase activity / platelet aggregation / endocytosis / G beta:gamma signalling through PI3Kgamma / Signaling by CSF1 (M-CSF) in myeloid cells / kinase activity / positive regulation of cytosolic calcium ion concentration / angiogenesis / adaptive immune response / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / non-specific serine/threonine protein kinase / protein kinase activity / inflammatory response / immune response / G protein-coupled receptor signaling pathway / phosphorylation / innate immune response / protein serine kinase activity / protein serine/threonine kinase activity / ATP binding / identical protein binding / membrane / plasma membrane / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.96 Å | ||||||
![]() | Burke, J.E. / Nam, S.E. / Rathinaswamy, M.K. / Yip, C.K. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Allosteric activation or inhibition of PI3Kγ mediated through conformational changes in the p110γ helical domain. Authors: Noah J Harris / Meredith L Jenkins / Sung-Eun Nam / Manoj K Rathinaswamy / Matthew A H Parson / Harish Ranga-Prasad / Udit Dalwadi / Brandon E Moeller / Eleanor Sheeky / Scott D Hansen / ...Authors: Noah J Harris / Meredith L Jenkins / Sung-Eun Nam / Manoj K Rathinaswamy / Matthew A H Parson / Harish Ranga-Prasad / Udit Dalwadi / Brandon E Moeller / Eleanor Sheeky / Scott D Hansen / Calvin K Yip / John E Burke / ![]() ![]() Abstract: PI3Kγ is a critical immune signaling enzyme activated downstream of diverse cell surface molecules, including Ras, PKCβ activated by the IgE receptor, and Gβγ subunits released from activated ...PI3Kγ is a critical immune signaling enzyme activated downstream of diverse cell surface molecules, including Ras, PKCβ activated by the IgE receptor, and Gβγ subunits released from activated GPCRs. PI3Kγ can form two distinct complexes, with the p110γ catalytic subunit binding to either a p101 or p84 regulatory subunit, with these complexes being differentially activated by upstream stimuli. Here, using a combination of cryo electron microscopy, HDX-MS, and biochemical assays, we have identified novel roles of the helical domain of p110γ in regulating lipid kinase activity of distinct PI3Kγ complexes. We defined the molecular basis for how an allosteric inhibitory nanobody potently inhibits kinase activity through rigidifying the helical domain and regulatory motif of the kinase domain. The nanobody did not block either p110γ membrane recruitment or Ras/Gβγ binding, but instead decreased ATP turnover. We also identified that p110γ can be activated by dual PKCβ helical domain phosphorylation leading to partial unfolding of an N-terminal region of the helical domain. PKCβ phosphorylation is selective for p110γ-p84 compared to p110γ-p101, driven by differential dynamics of the helical domain of these different complexes. Nanobody binding prevented PKCβ-mediated phosphorylation. Overall, this work shows an unexpected allosteric regulatory role of the helical domain of p110γ that is distinct between p110γ-p84 and p110γ-p101 and reveals how this can be modulated by either phosphorylation or allosteric inhibitory binding partners. This opens possibilities of future allosteric inhibitor development for therapeutic intervention. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 207.7 KB | Display | ![]() |
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PDB format | ![]() | 162.3 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 834.7 KB | Display | ![]() |
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Full document | ![]() | 842.7 KB | Display | |
Data in XML | ![]() | 34.9 KB | Display | |
Data in CIF | ![]() | 51.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 27627MC 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: 126627.406 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() References: UniProt: P48736, phosphatidylinositol 3-kinase, phosphatidylinositol-4,5-bisphosphate 3-kinase, phosphatidylinositol-4-phosphate 3-kinase, non-specific serine/threonine protein kinase |
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#2: Antibody | Mass: 14574.995 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
-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: Complex of p110 gamma with NB7 / Type: COMPLEX / Entity ID: all / Source: MULTIPLE SOURCES | |||||||||||||||||||||||||
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Molecular weight | Value: 0.126454 MDa / Experimental value: NO | |||||||||||||||||||||||||
Source (natural) | Organism: ![]() | |||||||||||||||||||||||||
Source (recombinant) | Organism: ![]() ![]() | |||||||||||||||||||||||||
Buffer solution | pH: 8.5 Details: Freshly prepared gel filtration buffer, filtered through 0.22 um filter and degassed | |||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.45 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES Details: Specimen was p110 gamma purified with stabilizing nanobody, NB7, to homogeneity by gel filtration. | |||||||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: C-flat-2/2 | |||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K Details: 3 uL of specimen was loaded onto grid and immediately blotted for 1.5 seconds with -5 force before plunging into liquid ethane. |
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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 defocus max: 2500 nm / Nominal defocus min: 500 nm |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 7344 |
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Processing
Software | Name: PHENIX / Version: 1.19.1_4122: / Classification: refinement | ||||||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||
3D reconstruction | Resolution: 2.96 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 149603 / Num. of class averages: 1 / Symmetry type: POINT | ||||||||||||||||||||||||||||
Atomic model building | PDB-ID: 7MEZ Pdb chain-ID: A / Accession code: 7MEZ / Pdb chain residue range: 1-1102 / Source name: PDB / Type: experimental model | ||||||||||||||||||||||||||||
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