Source:http://www.reactome.org/biopax/48887BiochemicalReaction2304
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A costimulatory signal involved in T cell activation is transmitted by CD28. This signal is delivered by the interaction of the CD28 receptor on T cells with its ligand B7-1 on the antigen-presenting cell and modulates T cell antigen recognition. Despite the homodimeric structure of CD28, it interacts with B7-1 as though it has a single binding site. The V-like domains of CD28 contains a strictly conserved MYPPPY sequence motif that maps to the CDR3-analogous loop and is critical for recognition of its ligands. B7-1 and B7-2 bind to overlapping but not identical sites on CD28,
Authored: Garapati, P V, 2008-12-16 11:12:19,
Edited: Garapati, P V, 2008-12-16 11:12:19,
Reviewed: Bluestone, JA, Esensten, J, 2009-06-01 18:47:33
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CD28 homodimer binds B7-1 homodimer
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