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Default NMR backbone dynamics studies of human PED/PEA-15 outline protein functional sites.

NMR backbone dynamics studies of human PED/PEA-15 outline protein functional sites.

NMR backbone dynamics studies of human PED/PEA-15 outline protein functional sites.

FEBS J. 2010 Sep 3;

Authors: Farina B, Pirone L, Russo L, Viparelli F, Doti N, Pedone C, Pedone EM, Fattorusso R

PED/PEA-15 (phosphoprotein enriched in diabetes/phosphoprotein enriched in astrocytes) is a ubiquitously expressed protein and a key regulator of cell growth and glucose metabolism. PED/PEA-15 mediates both homotypic and heterotypic interactions and is constituted by an N-terminal canonical death effector domain and a C-terminal tail. In the present study, the backbone dynamics of PED/PEA-15 via (15)N R(1) and R(2) and steady-state [(1)H]-(15)N NOE measurements is reported. The dynamic parameters were analyzed using both Lipari-Szabo model-free formalism and a reduced spectral density mapping approach. The results obtained define a polar and charged surface of the death effector domain characterized by internal motions in the micro- to millisecond timescale, which is crucial for the multiple heterotypic functional protein-protein interactions in which PED/PEA-15 is involved. The present study contributes to a better understanding of the molecular basis of the PED/PEA-15 functional interactions and provides a more detailed surface for the design and development of PED/PEA-15 binders.

PMID: 20825483 [PubMed - as supplied by publisher]



Source: PubMed
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