Cell-specific and lamin-dependent targeting of novel transmembrane proteins in the nuclear envelope

Malik, P., Korfali, N., Srsen, V., Lazou, V., Batrakou, D. G., Zuleger, N., Kavanagh, D. M., Wilkie, G. S., Goldberg, M. W. and Schirmer, E. C. (2010) Cell-specific and lamin-dependent targeting of novel transmembrane proteins in the nuclear envelope. Cellular and Molecular Life Sciences, 67(8), pp. 1353-1369. (doi: 10.1007/s00018-010-0257-2)

Abstract

Nuclear envelope complexity is expanding with respect to identification of protein components. Here we test the validity of proteomics results that identified 67 novel predicted nuclear envelope transmembrane proteins (NETs) from liver by directly comparing 30 as tagged fusions using targeting assays. This confirmed 21 as NETs, but 4 only targeted in certain cell types, underscoring the complexity of interactions that tether NETs to the nuclear envelope. Four NETs accumulated at the nuclear rim in normal fibroblasts but not in fibroblasts lacking lamin A, suggesting involvement of lamin A in tethering them in the nucleus. However, intriguingly, for the NETs tested alternative mechanisms for nuclear envelope retention could be found in Jurkat cells that normally lack lamin A. This study expands by a factor of three the number of liver NETs analyzed, bringing the total confirmed to 31, and shows that several have multiple mechanisms for nuclear envelope retention.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Wilkie, Dr Gavin
• Authors: Malik, P., Korfali, N., Srsen, V., Lazou, V., Batrakou, D. G., Zuleger, N., Kavanagh, D. M., Wilkie, G. S., Goldberg, M. W., and Schirmer, E. C.
• College/School: College of Medical Veterinary and Life Sciences > School of Infection & Immunity
• Journal Name: Cellular and Molecular Life Sciences
• Publisher: SP Birkhäuser Verlag Basel
• ISSN: 1420-682X
• ISSN (Online): 1420-9071
• Copyright Holders: Copyright © 2010 The Authors
• First Published: First published in Cellular and Molecular Life Sciences 67(8):1353-1369
• Publisher Policy: Reproduced under a Creative Commons License