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Implications for Diverse Functions of the LINC Complexes Based on the Structure

Department of Medical Technology, Ehime Prefectural University of Health Sciences, Ehime 791-2101, Japan
Academic Editor: Thomas Dechat
Received: 15 December 2016 / Revised: 15 January 2017 / Accepted: 17 January 2017 / Published: 26 January 2017
(This article belongs to the Collection Lamins and Laminopathies)
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The linker of nucleoskeleton and cytoskeleton (LINC) complex is composed of the outer and inner nuclear membrane protein families Klarsicht, Anc-1, and Syne homology (KASH), and Sad1 and UNC-84 (SUN) homology domain proteins. Increasing evidence has pointed to diverse functions of the LINC complex, such as in nuclear migration, nuclear integrity, chromosome movement and pairing during meiosis, and mechanotransduction to the genome. In metazoan cells, the nuclear envelope possesses the nuclear lamina, which is a thin meshwork of intermediate filaments known as A-type and B-type lamins and lamin binding proteins. Both of lamins physically interact with the inner nuclear membrane spanning SUN proteins. The nuclear lamina has also been implicated in various functions, including maintenance of nuclear integrity, mechanotransduction, cellular signalling, and heterochromatin dynamics. Thus, it is clear that the LINC complex and nuclear lamins perform diverse but related functions. However, it is unknown whether the LINC complex–lamins interactions are involved in these diverse functions, and their regulation mechanism has thus far been elusive. Recent structural analysis suggested a dynamic nature of the LINC complex component, thus providing an explanation for LINC complex organization. This review, elaborating on the integration of crystallographic and biochemical data, helps to integrate this research to gain a better understanding of the diverse functions of the LINC complex. View Full-Text
Keywords: LINC complex; SUN proteins; KASH; nesprin proteins; lamin LINC complex; SUN proteins; KASH; nesprin proteins; lamin

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Hieda, M. Implications for Diverse Functions of the LINC Complexes Based on the Structure. Cells 2017, 6, 3.

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