ARAP, a Novel Adaptor Protein, Is Required for TCR Signaling and Integrin-Mediated Adhesion
Abstract
A novel adaptor protein was identified by analyzing phosphotyrosine proteomes from membrane rafts of activated T cells. This protein showed sequence similarity to a well-known T cell adaptor protein, adhesion and degranulation-promoting adaptor protein (ADAP); therefore, the novel protein was designated activation-dependent, raft-recruited ADAP-like phosphoprotein (ARAP). Suppression of ARAP impaired the major signaling pathways downstream of the TCR. ARAP associated with the Src homology 2 domain of Src homology 2–containing leukocyte protein of 76 kDa via the phosphorylation of two YDDV motifs in response to TCR stimulation. ARAP also mediated integrin activation but was not involved in actin polymerization. The results of this study indicate that a novel T cell adaptor protein, ARAP, plays a unique role in T cells as a part of both the proximal activation signaling and inside–out signaling pathways that result in integrin activation and T cell adhesion.
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ADAP is a hematopoietic cell-specific immune adaptor protein encoded by the Fyb gene.
“Notably, adhesion and degranulation protein (ADAP), also known as FYB, is a hematopoietic cell-specific immune adaptor protein encoded by the Fyb gene [12].”
From Inhibition of SPI1 by ADAP Regulates S100A8/A9 Signaling in Macrophages to Control the Development of Colitis (2026) · cites this paper as [12]
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Self-citation
- Authors
- Jung, S. H., Yoo, E. H., Yu, M. J., Song, H. M., Kang, H. Y., Cho, J.-Y., & Lee, J. R.
- Affiliations
- Ewha Womans University (KR)
- Seoul National University (KR)
- Corresponding author
- Lee, Jong Ran
- Venue
- The Journal of Immunology
- Publisher
- Oxford University Press (OUP)
- Published
- 2016-08-01
- Volume
- 197
- Issue
- 3
- Pages
- 942-952
- ISSN
- 0022-1767 (ISSN-L)
- 1550-6606
- OpenAlex
- W2470425466
- Cited by
- 19
- References
- 47
- Citations by year
- 2026: 6 · 2025: 3 · 2024: 1 · 2023: 1 · 2022: 4 · 2021: 2 · 2020: 1 · 2019: 1
- FWCI
- 0.32
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Journal of Immunology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
- Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
- Keywords
- adaptor proteins, T cell receptor signaling, integrin activation, T cell adhesion, lipid rafts, ADAP, SH2D1A, inside-out signaling, T cell activation
- MeSH terms
- Cell Adhesion, Cell Line, Humans, Immunohistochemistry, Lymphocyte Activation, Receptors, Antigen, T-Cell, T-Lymphocytes, Signal Transduction, Integrins, Polymerase Chain Reaction, Membrane Microdomains, Adaptor Proteins, Signal Transducing
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