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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Contact with a component of the polymerase II holoenzyme suffices for gene activation.

In yeast strains bearing the point mutation called GAL11P (for potentiator), certain GAL4 derivatives lacking any classical activating region work as strong activators. The P mutation confers upon GAL11, a component of the RNA polymerase II holoenzyme, the ability to interact with a portion of the dimerization region of GAL4. The region of GAL11 affected by the P mutation is evidently functionally inert in ordinary cells, suggesting that this mutation is of no functional significance beyond creating an artificial target for the GAL4 dimerization fragment. From these observations and further analyses of GAL11, we propose that a single activator-holoenzyme contact can trigger gene activation simply by recruiting the latter to DNA.[1]

References

  1. Contact with a component of the polymerase II holoenzyme suffices for gene activation. Barberis, A., Pearlberg, J., Simkovich, N., Farrell, S., Reinagel, P., Bamdad, C., Sigal, G., Ptashne, M. Cell (1995) [Pubmed]
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