Two forms of RNA polymerase II holoenzyme display different abundance during the cell cycle

Tipo de material: Texto

TextoSeries ; BioChemical and Biophysical Research Communications, 302(2), p.484-488, 2003Trabajos contenidos:

Holland, L
Yankulov, K

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Resumen: We analyzed the composition and abundance of two forms of RNA polymerase II (pol II)holoenzyme in synchronized HeLa cells. We did not detect significant changes in pol II holoenzyme composition, but we noticed differences in the abundance of the two complexes at different stages of the cell cycle. Summarized data from several independent experiments demonstrate that pol II holoenzyme, which is purified by GST-TFIIS affinity chromatography, is more abundant during G1/S and S phases. Another form of pol II holoenzyme, which is purified by anti-CDK7 antibodies, shows relatively higher amounts in G2/M and early G1 phases.

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We analyzed the composition and abundance of two forms of RNA polymerase II (pol II)holoenzyme in synchronized HeLa cells. We did not detect significant changes in pol II holoenzyme composition, but we noticed differences in the abundance of the two complexes at different stages of the cell cycle. Summarized data from several independent experiments demonstrate that pol II holoenzyme, which is purified by GST-TFIIS affinity chromatography, is more abundant during G1/S and S phases. Another form of pol II holoenzyme, which is purified by anti-CDK7 antibodies, shows relatively higher amounts in G2/M and early G1 phases.

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