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HIC-5: A Mobile Molecular Scaffold Regulating the Anchorage Dependence of Cell Growth. | LitMetric

HIC-5: A Mobile Molecular Scaffold Regulating the Anchorage Dependence of Cell Growth.

Int J Cell Biol

Department of Cancer Cell Biology, Showa University School of Pharmacy, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan.

Published: August 2012

AI Article Synopsis

Article Abstract

HIC-5 is a multidomain LIM protein homologous to paxillin that serves as a molecular scaffold at focal adhesions and in the nucleus. It forms mobile molecular units with LIM-only proteins, PINCH, and CRP2 and translocates in and out of the nucleus via a nuclear export signal (NES). Of note, NES of HIC-5 is distinctive in its sensitivity to the cellular redox state. Recently, the mobile units of HIC-5 have been suggested to be involved in the regulation of the anchorage dependence of cell growth. On loss of adhesion, an increase in reactive oxygen species in the cells modifies NES and stops shuttling, which leads to cell-cycle control. More specifically, the system circumvents nuclear localization of cyclin D1 and transactivates p21(Cip1) in detached cells, thereby avoiding anchorage-independent cell growth. Thus, the HIC-5-LIM only protein complex has emerged as a fail-safe system for regulating the anchorage dependence of cell growth.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3227459PMC
http://dx.doi.org/10.1155/2012/426138DOI Listing

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