Nuclear proteins bind to poliovirus 5' untranslate region
Arch. med. res
;
27(3): 413-9, 1996. ilus
Article
in English
| LILACS
| ID: lil-200342
RESUMO
Poliovirus induces a shut-off of cellular messenger RNA (MRNA) translation by the proteolysis of a 220 kDa protein from the eukaryotic initiation factor eIF-4F, and by the phosphorylation of eIF-2. The absence of eIF-4F inhibiths the initiation of translation dependent on capa structure recognition. Poliovirus RNA lacks cap structure and translates by a cap-independent mechanism which requires internal ribosomal entry. The poliovirus 5' untranslated region (5'UTR) contains the structural elements for cap-independent translation called internal ribosomal entry site (IRES element). Several cellular proteins have been described interacting with different segments from poliovirus 5'UTR. We have studied the specific interaction between 57/60, 52, and 35 kDa cellular proteins with poliovirus nt 275 to 636 and full length 5'UTR. By Western blot assay the 57/60 protein was identified as a pyramidine tract binding protein PTB are nuclear proteins involved in RNA polymerase III transcription termination an splicing, respectively
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Index:
LILACS (Americas)
Main subject:
RNA Viruses
/
Nuclear Proteins
/
Blotting, Western
/
Poliovirus
/
Molecular Biology
Type of study:
Prognostic study
Language:
English
Journal:
Arch. med. res
Journal subject:
Medicine
Year:
1996
Type:
Article
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