Several novel nuclear envelope transmembrane proteins identified in skeletal muscle have cytoskeletal associations

Wilkie, G.S. et al. (2011) Several novel nuclear envelope transmembrane proteins identified in skeletal muscle have cytoskeletal associations. Molecular and Cellular Proteomics, 10(1), M110.003129. (doi: 10.1074/mcp.M110.003129)

Abstract

Nuclear envelopes from liver and a neuroblastoma cell line have previously been analyzed by proteomics; however, most diseases associated with the nuclear envelope affect muscle. To determine whether muscle has unique nuclear envelope proteins, rat skeletal muscle nuclear envelopes were prepared and analyzed by multidimensional protein identification technology. Many novel muscle-specific proteins were identified that did not appear in previous nuclear envelope data sets. Nuclear envelope residence was confirmed for 11 of these by expression of fusion proteins and by antibody staining of muscle tissue cryosections. Moreover, transcript levels for several of the newly identified nuclear envelope transmembrane proteins increased during muscle differentiation using mouse and human in vitro model systems. Some of these proteins tracked with microtubules at the nuclear surface in interphase cells and accumulated at the base of the microtubule spindle in mitotic cells, suggesting they may associate with complexes that connect the nucleus to the cytoskeleton. The finding of tissue-specific proteins in the skeletal muscle nuclear envelope proteome argues the importance of analyzing nuclear envelopes from all tissues linked to disease and suggests that general investigation of tissue differences in organellar proteomes might yield critical insights.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Wilkie, Dr Gavin
• Authors: Wilkie, G.S., Korfali, N., Swanson, S.K., Malik, P., Srsen, V., Batrakou, D.G., de las Heras, J., Zuleger, N., Kerr, A.R.W., Florens, L., and Schirmer, E.C.
• College/School: College of Medical Veterinary and Life Sciences > School of Infection & Immunity
• Journal Name: Molecular and Cellular Proteomics
• Publisher: American Society for Biochemistry and Molecular Biology, Inc.
• ISSN: 1535-9476
• ISSN (Online): 1535-9484
• Copyright Holders: Copyright © 2011 The American Society for Biochemistry and Molecular Biology, Inc
• First Published: First published in Molecular & Cellular Proteomics 10(1): M110.003129-1-M110.003129-16
• Publisher Policy: Reproduced under a Creative Commons License