Download MendeleyStructural analysis of emerin, an inner nuclear membrane protein mutated in X-linked Emery-Dreifuss muscular dystrophy
Wolff, N., Gilquin, B., Courchay, K., Callebaut, I., Worman, H.J., Zinn-Justin, S.(2001) FEBS Lett 501: 171-176
- PubMed: 11470279
- DOI: https://doi.org/10.1016/s0014-5793(01)02649-7
- Primary Citation of Related Structures:
1JEI - PubMed Abstract:
Like Duchenne and Becker muscular dystrophies, Emery-Dreifuss muscular dystrophy (EDMD) is characterized by myopathic and cardiomyopathic abnormalities. EDMD has the particularity of being linked to mutations in nuclear proteins. The X-linked form of EDMD is caused by mutations in the emerin gene, whereas autosomal dominant EDMD is caused by mutations in the lamin A/C gene. Emerin colocalizes with lamin A/C in interphase cells, and binds in vitro to lamin A/C. Recent work suggests that lamin A/C might serve as a receptor for emerin. We have undertaken a structural analysis of emerin, and in particular of its N-terminal domain, which is comprised in the emerin segment critical for binding to lamin A/C. We show that region 2-54 of emerin adopts the LEM fold. This fold was originally described in the two N-terminal domains of another inner nuclear membrane protein called lamina-associated protein 2 (LAP2). The existence of a conserved solvent-exposed surface on the LEM domains of LAP2 and emerin is discussed, as well as the nature of a possible common target.
Organizational Affiliation:
Département d' Ingénierie et d' Etudes des Protéines, CEA Saclay, Gif sur-Yvette, France.
