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Research Article

Cell proteins bind to sites within the 3' noncoding region and the positive-strand leader sequence of measles virus RNA.

R Leopardi, V Hukkanen, R Vainionpää, A A Salmi
R Leopardi
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V Hukkanen
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R Vainionpää
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A A Salmi
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ABSTRACT

The genomic 3' noncoding region (NCR) of nonsegmented negative-strand RNA viruses contains recognition site(s) for the polymerase complex, while the RNA plus-strand leader sequence (LS) is probably involved in RNA encapsidation. It is known that host-encoded factors play a role in transcription and replication of some of this group of viruses. Here we report that cellular proteins interact with the genomic 3' NCR and with the plus-strand LS RNA of an important human pathogen, measles virus (MV), a member of the family Paramyxoviridae. Using gel retardation assay and RNA footprinting analysis, we demonstrated that in Vero cells, host-encoded proteins bind specifically to domains within these two sequences. A polypeptide of about 20 kDa binding to the 3' NCR and two polypeptides of about 22 and 30 kDa interacting with plus-strand LS were detected by RNA-protein UV cross-linking. Different RNA-binding activities were found in cells differing in permissiveness to MV replication. The results suggest a role for host-encoded proteins in MV replication.

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Cell proteins bind to sites within the 3' noncoding region and the positive-strand leader sequence of measles virus RNA.
R Leopardi, V Hukkanen, R Vainionpää, A A Salmi
Journal of Virology Feb 1993, 67 (2) 785-790; DOI:

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Cell proteins bind to sites within the 3' noncoding region and the positive-strand leader sequence of measles virus RNA.
R Leopardi, V Hukkanen, R Vainionpää, A A Salmi
Journal of Virology Feb 1993, 67 (2) 785-790; DOI:
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