Abstract
Our long-term efforts to elucidate receptor-mediated signalling in immune cells, particularly transmembrane signalling initiated by FcɛRI, the receptor for IgE in mast cells, led us unavoidably to contemplate the role of the heterogeneous plasma membrane. Our early investigations with fluorescence microscopy revealed co-redistribution of certain lipids and signalling components with antigen-cross-linked IgE-FcɛRI and pointed to participation of ordered membrane domains in the signalling process. With a focus on this function, we have worked along with others to develop diverse and increasingly sophisticated tools to analyse the complexity of membrane structure that facilitates regulation and targeting of signalling events. The present chapter describes how initial membrane interactions of clustered IgE-FcɛRI lead to downstream cellular responses and how biochemical information integrated with nanoscale resolution spectroscopy and imaging is providing mechanistic insights at the level of molecular complexes.
Publication types
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Research Support, N.I.H., Extramural
MeSH terms
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Antigens / chemistry
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Antigens / metabolism
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Calcium / metabolism
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Calcium Channels / genetics
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Calcium Channels / metabolism
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Cell Membrane / chemistry*
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Cell Membrane / metabolism
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Cell Membrane / ultrastructure
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Exocytosis
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Gene Expression
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Humans
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Immunoglobulin E / genetics
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Immunoglobulin E / metabolism*
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Mast Cells / chemistry*
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Mast Cells / metabolism
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Mast Cells / ultrastructure
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Membrane Proteins / genetics
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Membrane Proteins / metabolism
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Molecular Imaging / instrumentation
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Molecular Imaging / methods
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Neoplasm Proteins / genetics
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Neoplasm Proteins / metabolism
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ORAI1 Protein
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Phosphatidylinositols / metabolism
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Phospholipase C gamma / genetics
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Phospholipase C gamma / metabolism
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Protein Binding
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Qa-SNARE Proteins / genetics
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Qa-SNARE Proteins / metabolism
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Receptors, IgE / genetics
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Receptors, IgE / metabolism*
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Signal Transduction*
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Spectrum Analysis / instrumentation
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Spectrum Analysis / methods
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Static Electricity
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Stromal Interaction Molecule 1
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src-Family Kinases / genetics
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src-Family Kinases / metabolism
Substances
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Antigens
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Calcium Channels
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Membrane Proteins
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Neoplasm Proteins
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ORAI1 Protein
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ORAI1 protein, human
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Phosphatidylinositols
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Qa-SNARE Proteins
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Receptors, IgE
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STIM1 protein, human
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Stromal Interaction Molecule 1
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Immunoglobulin E
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lyn protein-tyrosine kinase
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src-Family Kinases
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Phospholipase C gamma
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Calcium