Gene overlap and site-specific attenuation of transcription of the viral polymerase L gene of human respiratory syncytial virus.
Proc Natl Acad Sci U S A
; 84(15): 5134-8, 1987 Aug.
Article
em En
| MEDLINE
| ID: mdl-2440043
ABSTRACT
Sequence analysis of the gene encoding polymerase L protein of respiratory syncytial virus showed that L-gene transcription initiates within its upstream neighbor, the gene encoding the 22-kDa protein 22K. This is an exception to the canonical mode of sequential transcription of nonoverlapping genes described for other nonsegmented negative-strand RNA viruses. As a consequence of the gene overlap, the termination/polyadenylylation signal for the 22K gene is located at nucleotides 56-68 within the L gene. L-gene transcription yielded two RNAs an abundant, truncated, polyadenylylated transcript resulting from termination at the internal signal and a markedly less abundant large polyadenylylated transcript representing the complete L gene. This result showed that the internal termination/polyadenylylation signal is an attenuator of L-gene transcription.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Vírus Sinciciais Respiratórios
/
Transcrição Gênica
/
Proteínas Virais
/
Genes Virais
Idioma:
En
Ano de publicação:
1987
Tipo de documento:
Article