4,085 results found
    1. Immunology and Inflammation

    IgM and IgD B cell receptors differentially respond to endogenous antigens and control B cell fate

    Mark Noviski et al.
    Self-reactive B cells downregulate the IgM but not the IgD B cell receptor, and this serves as a critical tolerance mechanism because IgD is less sensitive to bona fide endogenous antigens than IgM.
    1. Immunology and Inflammation

    B cell activation involves nanoscale receptor reorganizations and inside-out signaling by Syk

    Kathrin Kläsener et al.
    Studying the earliest events in B cell activation reveals that the B cell antigen receptor is opened and activated via the phosphorylation and binding by the spleen tyrosine kinase (Syk).
    1. Cell Biology
    2. Immunology and Inflammation

    Regulation of B cell fate by chronic activity of the IgE B cell receptor

    Zhiyong Yang et al.
    The immunoglobulin E (IgE) B cell receptor promotes plasma cell differentiation in the absence of cognate antigen and limits the competitive fitness of IgE+ B cells in germinal centers.
    1. Immunology and Inflammation

    Conformational change within the extracellular domain of B cell receptor in B cell activation upon antigen binding

    Zhixun Shen et al.
    Conformational changes occur within extracellular domain of BCR upon antigen engagement, and these conformational changes are related with the strength of BCR activation and are distinct in IgM- and IgG-BCR.
    1. Immunology and Inflammation

    B cell receptor and Toll-like receptor signaling coordinate to control distinct B-1 responses to both self and the microbiota

    Lieselotte SM Kreuk et al.
    Microbial-sensing TLRs drive responses to the microbiota, while nucleic-acid sensing TLRs control responses to endogenous ligands, revealing novel regulation of B-1a responses through integrated BCR/TLR mediated activation.
    1. Cell Biology
    2. Immunology and Inflammation

    Arp2/3 complex-driven spatial patterning of the BCR enhances immune synapse formation, BCR signaling and B cell activation

    Madison Bolger-Munro et al.
    Arp2/3 complex-mediated actin polymerization shapes how B lymphocytes probe the surface of antigen-presenting cells, promotes coalescence of B cell receptor (BCR) microclusters, amplifies BCR signaling, and enhances B cell activation.
    1. Chromosomes and Gene Expression

    Dynamic repression by BCL6 controls the genome-wide liver response to fasting and steatosis

    Meredith A Sommars et al.
    B cell lymphoma 6 (BCL6) represses fasting gene expression by opposing peroxisome proliferator-activated receptor alpha (PPARa) activity at enhancers, and its ablation protects against steatosis by enhancing fatty acid catabolism.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural insight into the activation of a class B G-protein-coupled receptor by peptide hormones in live human cells

    Lisa Seidel et al.
    Agonist and antagonist peptides of the corticotropin-releasing factor receptor type 1 adopt different folds and stabilize distinct conformations of the receptor transmembrane domain, which involves tilting of helices VI and VII around conserved glycine hinges.
    1. Immunology and Inflammation
    2. Microbiology and Infectious Disease

    Malaria-associated atypical memory B cells exhibit markedly reduced B cell receptor signaling and effector function

    Silvia Portugal et al.
    Atypical memory B cells (MBCs) appear to differentiate from classical MBCs during chronic exposure to the malaria parasite Plasmodium falciparum, and may interfere with the acquisition of immunity to the disease.
    1. Biochemistry and Chemical Biology

    A dynamic interaction between CD19 and the tetraspanin CD81 controls B cell co-receptor trafficking

    Katherine J Susa et al.
    The tetraspanin CD81 uses its ectodomain to export CD19, and the interaction of the two proteins is dynamically regulated by B cell activation state.

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