Unphosphorylated SR-Like Protein Npl3 Stimulates RNA Polymerase II Elongation
2008
Npl3 Stimulates RNA Polymerase II Elongation
publication
Evidence: high
Author Information
Author(s): Jessica L. Dermody, Jonathan M. Dreyfuss, Judit Villén, Babatunde Ogundipe, Steven P. Gygi, Peter J. Park, Alfred S. Ponticelli, Claire L. Moore, Stephen Buratowski, Miriam E. Bucheli
Primary Institution: Harvard Medical School
Hypothesis
Does the unphosphorylated SR-like protein Npl3 stimulate RNA polymerase II elongation?
Conclusion
Npl3 enhances the elongation rate of RNA polymerase II and its activity is regulated by phosphorylation.
Supporting Evidence
- Npl3 interacts with RNA polymerase II and stimulates its elongation activity.
- Phosphorylation of Npl3 inhibits its interaction with RNA polymerase II.
- Npl3's effect on elongation is reduced when it is phosphorylated.
Takeaway
Npl3 helps a machine that makes RNA work faster, but when it gets a special tag (phosphorylation), it doesn't help as much.
Methodology
The study used in vitro transcription assays to measure the effect of Npl3 on RNA polymerase II elongation.
Digital Object Identifier (DOI)
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