TY - JOUR
T1 - Direct inhibition of RNA polymerase II transcription by RECQL5
AU - Aygün, Ozan
AU - Xu, Xiaohua
AU - Liu, Yilun
AU - Takahashi, Hidehisa
AU - Kong, Stephanie E.
AU - Conaway, Ronald C.
AU - Conaway, Joan W.
AU - Svejstrup, Jesper Q.
PY - 2009/8/28
Y1 - 2009/8/28
N2 - DNA helicases of the RECQ family are important for maintaining genome integrity, from bacteria to humans. Although progress has been made in understanding the biochemical role of some human RECQ helicases, that of RECQL5 remains elusive. We recently reported that RECQL5 interacts with RNA polymerase II (RNAPII), pointing to a role for the protein in transcription. Here, we show that RECQL5 inhibits both initiation and elongation in transcription assays reconstituted with highly purified general transcription factors and RNAPII. Such inhibition is not observed with the related, much more active RECQL1 helicase or with a version of RECQL5 that has normal helicase activity but is impaired in its ability to interact with RNAPII. Indeed, RECQL5 helicase activity is not required for inhibition. We discuss our findings in light of the fact RECQ5-/- mice have elevated levels of DNA recombination and a higher incidence of cancer.
AB - DNA helicases of the RECQ family are important for maintaining genome integrity, from bacteria to humans. Although progress has been made in understanding the biochemical role of some human RECQ helicases, that of RECQL5 remains elusive. We recently reported that RECQL5 interacts with RNA polymerase II (RNAPII), pointing to a role for the protein in transcription. Here, we show that RECQL5 inhibits both initiation and elongation in transcription assays reconstituted with highly purified general transcription factors and RNAPII. Such inhibition is not observed with the related, much more active RECQL1 helicase or with a version of RECQL5 that has normal helicase activity but is impaired in its ability to interact with RNAPII. Indeed, RECQL5 helicase activity is not required for inhibition. We discuss our findings in light of the fact RECQ5-/- mice have elevated levels of DNA recombination and a higher incidence of cancer.
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U2 - 10.1074/jbc.M109.015750
DO - 10.1074/jbc.M109.015750
M3 - Article
C2 - 19570979
AN - SCOPUS:69949145039
SN - 0021-9258
VL - 284
SP - 23197
EP - 23203
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
IS - 35
ER -