Transcribing RNA polymerase II is phosphorylated at CTD residue serine-7 - PubMed (original) (raw)

. 2007 Dec 14;318(5857):1780-2.

doi: 10.1126/science.1145977.

Affiliations

• PMID: 18079404
• DOI: 10.1126/science.1145977

Transcribing RNA polymerase II is phosphorylated at CTD residue serine-7

Rob D Chapman et al. Science. 2007.

Abstract

RNA polymerase II is distinguished by its large carboxyl-terminal repeat domain (CTD), composed of repeats of the consensus heptapeptide Tyr1-Ser2-Pro3-Thr4-Ser5-Pro6-Ser7. Differential phosphorylation of serine-2 and serine-5 at the 5' and 3' regions of genes appears to coordinate the localization of transcription and RNA processing factors to the elongating polymerase complex. Using monoclonal antibodies, we reveal serine-7 phosphorylation on transcribed genes. This position does not appear to be phosphorylated in CTDs of less than 20 consensus repeats. The position of repeats where serine-7 is substituted influenced the appearance of distinct phosphorylated forms, suggesting functional differences between CTD regions. Our results indicate that restriction of serine-7 epitopes to the Linker-proximal region limits CTD phosphorylation patterns and is a requirement for optimal gene expression.

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Comment in

• Transcription. Seven ups the code.
  Corden JL. Corden JL. Science. 2007 Dec 14;318(5857):1735-6. doi: 10.1126/science.1152624. Science. 2007. PMID: 18079391 No abstract available.

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