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Protein protein and dna protein transactions during gene activation activator sigma n contacts and the dna melting activity of the sigma n activator complex

Objectif



Determination of the critical protein-protein interactions in transcription systems and in particular between sigma-N and its activator, and the contribution of the sigma-N holoenzyme-activator complex to the DNA strand separation (melting) process are essential for the understanding of the mechanism of transcriptional activation of the RNA polymerase holoenzyme. The sigma-N protein is well suited to analysis as biochemically active domains have been isolated. The overall aims of the proposed work are to: (a) Locate the putative protein-protein interactions between activator and the sigma-N protein, that appear to be critical for activation of RNA polymerase holoenzyme.
(b) Identify promoter DNA-contact regions of the sigma-N
holoenzyme-activator complex during catalysis of open complex formation. (c) Mutate candidate DNA and activator contact regions of sigma-N identified as described above. Screen mutants defective in either a DNA contact during DNA melting and/or activation interaction.
(d) Analyse the DNA-melting process, dependent of the formation of the sigma-N holoenzyme-activator complex.

Champ scientifique (EuroSciVoc)

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Thème(s)

Appel à propositions

Données non disponibles

Régime de financement

RGI - Research grants (individual fellowships)

Coordinateur

IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY AND MEDICINE
Contribution de l’UE
Aucune donnée
Adresse
Campus at Silwood Park, Road A329 (Virginia Water
SW7 2AZ LONDON
Royaume-Uni
Coût total
Aucune donnée

Participants (1)