Events during initiation of archaeal transcription: open complex formation and DNA-protein interactions.
J Bacteriol
; 183(10): 3025-31, 2001 May.
Article
en En
| MEDLINE
| ID: mdl-11325929
ABSTRACT
Transcription in Archaea is initiated by association of a TATA box binding protein (TBP) with a TATA box. This interaction is stabilized by the binding of the transcription factor IIB (TFIIB) orthologue TFB. We show here that the RNA polymerase of the archaeon Methanococcus, in contrast to polymerase II, does not require hydrolysis of the beta-gamma bond of ATP for initiation of transcription and open complex formation on linearized DNA. Permanganate probing revealed that the archaeal open complex spanned at least the DNA region from -11 to -1 at a tRNA(Val) promoter. The Methanococcus TBP-TFB promoter complex protected the DNA region from -40 to -14 on the noncoding DNA strand and the DNA segment from -36 to -17 on the coding DNA strand from DNase I digestion. This DNase I footprint was extended only to the downstream end by the addition of the RNA polymerase to position +17 on the noncoding strand and to position +13 on the coding DNA strand.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Transcripción Genética
/
Methanococcus
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Proteínas Arqueales
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ADN de Archaea
Idioma:
En
Revista:
J Bacteriol
Año:
2001
Tipo del documento:
Article