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Open data
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Basic information
Entry | Database: PDB / ID: 7fjf | ||||||
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Title | Cryo-EM structure of a membrane protein(CS) | ||||||
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![]() | IMMUNE SYSTEM / membrane / immune | ||||||
Function / homology | ![]() regulation of lymphocyte apoptotic process / gamma-delta T cell receptor complex / Fc-gamma receptor III complex / T cell anergy / positive regulation of T cell anergy / positive regulation of cell-cell adhesion mediated by integrin / Fc-gamma receptor signaling pathway / T cell activation involved in immune response / CD4-positive, alpha-beta T cell proliferation / gamma-delta T cell activation ...regulation of lymphocyte apoptotic process / gamma-delta T cell receptor complex / Fc-gamma receptor III complex / T cell anergy / positive regulation of T cell anergy / positive regulation of cell-cell adhesion mediated by integrin / Fc-gamma receptor signaling pathway / T cell activation involved in immune response / CD4-positive, alpha-beta T cell proliferation / gamma-delta T cell activation / negative thymic T cell selection / positive regulation of CD4-positive, alpha-beta T cell proliferation / alpha-beta T cell receptor complex / positive regulation of protein localization to cell surface / positive thymic T cell selection / signal complex assembly / Nef and signal transduction / positive regulation of cell-matrix adhesion / T cell receptor complex / smoothened signaling pathway / establishment or maintenance of cell polarity / positive regulation of interleukin-4 production / dendrite development / Translocation of ZAP-70 to Immunological synapse / Phosphorylation of CD3 and TCR zeta chains / alpha-beta T cell activation / Generation of second messenger molecules / immunological synapse / FCGR activation / PD-1 signaling / Role of phospholipids in phagocytosis / positive regulation of calcium-mediated signaling / T cell receptor binding / negative regulation of smoothened signaling pathway / positive regulation of T cell proliferation / immunoglobulin complex, circulating / immunoglobulin receptor binding / cell surface receptor protein tyrosine kinase signaling pathway / T cell costimulation / positive regulation of interleukin-2 production / T cell activation / cerebellum development / FCGR3A-mediated IL10 synthesis / protein tyrosine kinase binding / complement activation, classical pathway / calcium-mediated signaling / apoptotic signaling pathway / FCGR3A-mediated phagocytosis / antigen binding / response to bacterium / clathrin-coated endocytic vesicle membrane / Regulation of actin dynamics for phagocytic cup formation / SH3 domain binding / transmembrane signaling receptor activity / peptide antigen binding / positive regulation of peptidyl-tyrosine phosphorylation / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / positive regulation of type II interferon production / cell-cell junction / signaling receptor complex adaptor activity / protein transport / Cargo recognition for clathrin-mediated endocytosis / Downstream TCR signaling / protein complex oligomerization / Clathrin-mediated endocytosis / T cell receptor signaling pathway / cell body / antibacterial humoral response / protein-containing complex assembly / regulation of apoptotic process / adaptive immune response / dendritic spine / cell surface receptor signaling pathway / blood microparticle / G protein-coupled receptor signaling pathway / protein heterodimerization activity / external side of plasma membrane / negative regulation of gene expression / positive regulation of gene expression / protein kinase binding / Golgi apparatus / cell surface / endoplasmic reticulum / protein homodimerization activity / extracellular exosome / identical protein binding / membrane / plasma membrane / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.1 Å | ||||||
![]() | Chen, Y. / Zhu, Y. / Gao, W. / Zhang, A. / Guo, C. / Huang, Z. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Cholesterol inhibits TCR signaling by directly restricting TCR-CD3 core tunnel motility. Authors: Yan Chen / Yuwei Zhu / Xiang Li / Wenbo Gao / Ziqi Zhen / De Dong / Buliao Huang / Zhuo Ma / Anqi Zhang / Xiaocui Song / Yan Ma / Changyou Guo / Fan Zhang / Zhiwei Huang / ![]() Abstract: Cholesterol molecules specifically bind to the resting αβTCR to inhibit cytoplasmic CD3ζ ITAM phosphorylation through sequestering the TCR-CD3 complex in an inactive conformation. The mechanisms ...Cholesterol molecules specifically bind to the resting αβTCR to inhibit cytoplasmic CD3ζ ITAM phosphorylation through sequestering the TCR-CD3 complex in an inactive conformation. The mechanisms of cholesterol-mediated inhibition of TCR-CD3 and its activation remain unclear. Here, we present cryoelectron microscopy structures of cholesterol- and cholesterol sulfate (CS)-inhibited TCR-CD3 complexes and an auto-active TCR-CD3 variant. The structures reveal that cholesterol molecules act like a latch to lock CD3ζ into an inactive conformation in the membrane. Mutations impairing binding of cholesterol molecules to the tunnel result in the movement of the proximal C terminus of the CD3ζ transmembrane helix, thereby activating the TCR-CD3 complex in human cells. Together, our data reveal the structural basis of TCR inhibition by cholesterol, illustrate how the cholesterol-binding tunnel is allosterically coupled to TCR triggering, and lay a foundation for the development of immunotherapies through directly targeting the TCR-CD3 complex. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 204.6 KB | Display | ![]() |
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PDB format | ![]() | 160.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 992.5 KB | Display | ![]() |
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Full document | ![]() | 995.4 KB | Display | |
Data in XML | ![]() | 34.3 KB | Display | |
Data in CIF | ![]() | 51.4 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 31620MC ![]() 7fjdC ![]() 7fjeC 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
-T-cell surface glycoprotein CD3 ... , 4 types, 6 molecules badefg
#1: Protein | Mass: 18810.520 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #2: Protein | | Mass: 18949.537 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #3: Protein | Mass: 23174.227 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #4: Protein | | Mass: 20493.457 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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-T cell receptor ... , 2 types, 2 molecules mn
#5: Protein | Mass: 30763.717 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: A0A0B4J271, UniProt: A0N4Z6, UniProt: P01848 |
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#6: Protein | Mass: 34614.051 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: A0A0K0K1A5, UniProt: P0DSE2, UniProt: A0A0G2JMB4 |
-Non-polymers , 1 types, 2 molecules ![](data/chem/img/C3S.gif)
#7: Chemical |
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-Details
Has ligand of interest | 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: immune system / Type: COMPLEX / Entity ID: #1-#6 / Source: RECOMBINANT |
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Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 8 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: NITROGEN |
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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 |
Image recording | Electron dose: 60 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3D reconstruction | Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 1028575 / Symmetry type: POINT |