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BioMed Research International
Volume 2014, Article ID 918183, 12 pages
http://dx.doi.org/10.1155/2014/918183
Review Article

The E3 Ligase CHIP: Insights into Its Structure and Regulation

Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), 4 Raja S.C. Mullick Road, Kolkata 700032, India

Received 7 February 2014; Accepted 7 April 2014; Published 24 April 2014

Academic Editor: Hiroyuki Tomiyama

Copyright © 2014 Indranil Paul and Mrinal K. Ghosh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The carboxy-terminus of Hsc70 interacting protein (CHIP) is a cochaperone E3 ligase containing three tandem repeats of tetratricopeptide (TPR) motifs and a C-terminal U-box domain separated by a charged coiled-coil region. CHIP is known to function as a central quality control E3 ligase and regulates several proteins involved in a myriad of physiological and pathological processes. Recent studies have highlighted varied regulatory mechanisms operating on the activity of CHIP which is crucial for cellular homeostasis. In this review article, we give a concise account of our current knowledge on the biochemistry and regulation of CHIP.