Journal
FEBS LETTERS
Volume 580, Issue 27, Pages 6435-6441Publisher
WILEY
DOI: 10.1016/j.febslet.2006.10.060
Keywords
nuclear envelope; inner nuclear membrane; transmembrane proteins; nuclear morphology
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The inner nuclear membrane (INM) of eukaryotic cells is characterized by a unique set of transmembrane proteins which interact with chromatin and/or the nuclear lamina. The number of identified INM proteins is steadily increasing, mainly as a result of proteomic and computational approaches. However, despite a link between mutation of several of these proteins and disease, the function of most transmembrane proteins of the INM remains unknown and depletion of many of these proteins from a variety of systems did not produce an obvious phenotype in the affected cells. Here, we report that depletion of the conserved INM protein Lem2 from human cell lines leads to abnormally shaped nuclei and severely reduces cell survival. We suggest that interactions of Lem2 with lamins or chromatin are critical for maintaining the integrity of the nuclear envelope. (c) 2006 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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