Abstract
The GYF domain of CD2BP2 serves as an adapter that recognizes proline-rich sequences in intracellular proteins. Although the T cell adhesion molecule CD2 and the core splicing protein SmB/B' were previously shown to interact with CD2BP2-GYF, we are now using a general approach to identify putative GYF domain target sites within the human proteome. The phage display-derived recognition motif for CD2BP2-GYF is PPG(W/F/Y/M/L). SPOT analysis confirmed that the GYF domain interacts with peptides from human proteins containing the consensus site. Epitope mapping by NMR spectroscopy performed for several peptides revealed a conserved binding surface. A direct interaction of the CD2BP2-GYF domain with the novel protein interaction partners PI31 and NPWBP was verified by yeast two-hybrid analysis.
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