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FEBS Lett. 2002 Feb 13;512(1-3):19-24.

Structure and functional properties of the ubiquitin binding protein p62.

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Department of Biological Sciences, Program in Cellular and Molecular Biosciences, 331 Funchess Hall, Auburn University, Auburn, AL 36849, USA.


Several highly conserved p62 homologs have recently been isolated, e.g. the rat atypical protein kinase C-interacting protein (ZIP), the murine A170/signal transduction and adapter protein, and the human p62, a protein that binds the Src homology 2 domain of p56(lck). These proteins share striking similarity in amino acid sequence and structural motifs, thereby suggesting conserved functional properties. ZIP/p62 has been shown to play an important role as a scaffold leading to the activation of the transcription factor nuclear factor kappaB. In addition, a nuclear form of p62 has been characterized that can serve as a transcriptional co-activator. Moreover, p62 is capable of binding ubiquitin (Ub) non-covalently through its Ub-associated domain. In this review, we will focus on the structure and function of ZIP/p62.

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