Characterization of signal sequences determining the nuclear export of Newcastle disease virus matrix protein

Characterization of signal sequences determining the nuclear export of Newcastle disease virus... The Newcastle disease virus (NDV) matrix (M) protein has been demonstrated to be a nuclear-cytoplasmic trafficking protein. Previous studies have shown that the M protein localizes in the nucleus through a bipartite nuclear localization signal. Here, we report that the ability of the M protein to shuttle to the cytoplasm is mediated by three nuclear export signal sequences (NESs). Using leptomycin B (LMB), a specific inhibitor of CRM1, we found that the nuclear export of the three NESs was LMB insensitive and thus was CRM1 independent. In addition, inactivation of these NESs led to nuclear accumulation of the M protein. Our results highlight the significance of these NESs to the nuclear export of the NDV M protein. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Characterization of signal sequences determining the nuclear export of Newcastle disease virus matrix protein

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Publisher
Springer Vienna
Copyright
Copyright © 2013 by Springer-Verlag Wien
Subject
Biomedicine; Virology; Medical Microbiology; Infectious Diseases
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s00705-013-1769-5
Publisher site
See Article on Publisher Site

Abstract

The Newcastle disease virus (NDV) matrix (M) protein has been demonstrated to be a nuclear-cytoplasmic trafficking protein. Previous studies have shown that the M protein localizes in the nucleus through a bipartite nuclear localization signal. Here, we report that the ability of the M protein to shuttle to the cytoplasm is mediated by three nuclear export signal sequences (NESs). Using leptomycin B (LMB), a specific inhibitor of CRM1, we found that the nuclear export of the three NESs was LMB insensitive and thus was CRM1 independent. In addition, inactivation of these NESs led to nuclear accumulation of the M protein. Our results highlight the significance of these NESs to the nuclear export of the NDV M protein.

Journal

Archives of VirologySpringer Journals

Published: Dec 1, 2013

References

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