Journal
IMMUNOLOGIC RESEARCH
Volume 42, Issue 1-3, Pages 51-64Publisher
HUMANA PRESS INC
DOI: 10.1007/s12026-008-8034-0
Keywords
Nedd4; Itch; Ndfip1; Cbl; Cbl-b; T cell activation; Anergy; E3 ubiquitin ligase
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Funding
- NIAID NIH HHS [R01 AI093566, R01 AI080765] Funding Source: Medline
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Engagement of the T cell receptor (TCR) with its cognate peptide/MHC initiates a cascade of signaling events that results in T cell activation. Limiting the extent and duration of TCR signaling ensures a tightly constrained response, protecting cells from the deleterious impact of chronic activation. In order to limit the duration of activation, T cells must adjust levels of key signaling proteins. This can be accomplished by altering protein synthesis or by changing the rate of protein degradation. Ubiquitination is a process of 'tagging' a protein with ubiquitin and is one means of initiating protein degradation. This process is activated when an E3 ubiquitin ligase mediates the transfer of ubiquitin to a target protein. Accordingly, E3 ubiquitin ligases have recently emerged as key regulators of immune cell function. This review will explore how a small group of E3 ubiquitin ligases regulate T cell responses and thus direct adaptive immunity.
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