Protein interaction domains of the measles virus nucleocapsid protein (NP)

Protein interaction domains of the measles virus nucleocapsid protein (NP) The currently accepted model for measles virus (MV) transcription and replication assumes the nucleocapsid (NP) protein to possess the ability to bind to RNA, to other NP molecules, and to the phosphoprotein (P) during ribonucleocapsid (RNP) assembly, as well as to the matrix protein (M) during virion assembly. We have cloned the MV NP open reading frame and have expressed the protein in bacteria as a fusion with glutathione-S-transferase (GST). Affinity purified GST-NP fusion protein has been used as a probe to examine the interaction of NP with ( 35 S) methionine labeled proteins from MV-infected cells. We have demonstrated definite and specific interactions between NP and itself and between NP and P, but have been unable to demonstrate any interaction between NP and M. We have been able to provide independent confirmation of this pattern of interaction using the yeast two-hybrid assay. We have, in addition, been able to map the domains of NP involved in these interactions by assays using sets of amino- and carboxy-terminal deletion mutants of GST-NP. The NP-NP interaction domain was found to reside in the highly conserved middle and amino-terminal domains of the protein. The hyper-variable carboxy-terminus and the conserved middle domain appear to constitute separate and independent sites for the binding of P to NP. The significance of these findings in regard to MV transcription and replication is discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Protein interaction domains of the measles virus nucleocapsid protein (NP)

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Publisher
Springer-Verlag
Copyright
Copyright © Wien by 1997 Springer-Verlag/
Subject
Legacy
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s007050050078
Publisher site
See Article on Publisher Site

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