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Default NMR studies of tandem WW domains of Nedd4 in complex with a PY motif-containing regio

NMR studies of tandem WW domains of Nedd4 in complex with a PY motif-containing region of the epithelial sodium channel.

Related Articles NMR studies of tandem WW domains of Nedd4 in complex with a PY motif-containing region of the epithelial sodium channel.

Biochem Cell Biol. 1998;76(2-3):341-50

Authors: Kanelis V, Farrow NA, Kay LE, Rotin D, Forman-Kay JD

Nedd4 (neuronal precursor cell-expressed developmentally down-regulated 4) is a ubiquitin-protein ligase containing multiple WW domains. We have previously demonstrated the association between the WW domains of Nedd4 and PPxY (PY) motifs of the epithelial sodium channel (ENaC). In this paper, we report the assignment of backbone 1H alpha, 1HN, 15N, 13C', 13C alpha, and aliphatic 13C resonances of a fragment of rat Nedd4 (rNedd4) containing the two C-terminal WW domains, WW(II+III), complexed to a PY motif-containing peptide derived from the beta subunit of rat ENaC, the betaP2 peptide. The secondary structures of these two WW domains, determined from chemical shifts of 13C alpha and 13C beta resonances, are virtually identical to those of the WW domains of the Yes-associated protein YAP65 and the peptidyl-prolyl isomerase Pin1. Triple resonance experiments that detect the 1H alpha chemical shift were necessary to complete the chemical shift assignment, owing to the large number of proline residues in this fragment of rNedd4. A new experiment, which correlates sequential residues via their 15N nuclei and also detects 1H alpha chemical shifts, is introduced and its utility for the chemical shift assignment of sequential proline residues is discussed. Data collected on the WW(II+III)-betaP2 complex indicate that these WW domains have different affinities for the betaP2 peptide.

PMID: 9923703 [PubMed - indexed for MEDLINE]



Source: PubMed
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