Wang, Bin; Alam, Steven L.; Meyer, Hemmo; Payne, Marielle; Stemmler, Timothy L.; Davis, Darrell R.; Sundquist, Wesley I.:
Structure and Ubiquitin Interactions of the Conserved Zinc Finger Domain of Npl4
2003
In: The journal of biological chemistry : JBC, Band 278 (2003), S. 20225 - 20234
Artikel/Aufsatz in Zeitschrift / Fach: Biologie
Titel:
Structure and Ubiquitin Interactions of the Conserved Zinc Finger Domain of Npl4
Autor(in):
Wang, Bin; Alam, Steven L.; Meyer, Hemmo im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Payne, Marielle; Stemmler, Timothy L.; Davis, Darrell R.; Sundquist, Wesley I.
Erscheinungsjahr
2003
Erschienen in:
The journal of biological chemistry : JBC, Band 278 (2003), S. 20225 - 20234
WWW URL

Abstract:

Ubiquitylated proteins are directed into a large number of different cellular pathways through interactions with effector proteins that contain conserved ubiquitin binding motifs. Here, we report the solution structure and ubiquitin binding properties of one such motif, the Npl4 zinc finger or RanBP2/Nup358 zinc finger (NZF) domain. Npl4 NZF forms a compact module composed of four antiparallel β-strands linked by three ordered loops. A single zinc ion is coordinated by four conserved cysteines from the first and third loops, which form two rubredoxin knuckles. Npl4 NZF binds specifically, but weakly, to free ubiquitin using a conserved 13TF14 dipeptide to interact with the “Ile-44” surface of ubiquitin. Our studies reveal the structure of this versatile class of protein binding domains and provide a means for identifying the subset of NZF domains likely to bind ubiquitin.