X chromosome dosage compensation via enhanced transcriptional elongation in Drosophila.
X chromosome dosage compensation via enhanced transcriptional elongation in Drosophila.
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DOI:
10.1038/nature09757
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发表时间:
2011-03-03
期刊:
影响因子:
64.8
通讯作者:
Kuroda MI
中科院分区:
文献类型:
--
作者:
Larschan E;Bishop EP;Kharchenko PV;Core LJ;Lis JT;Park PJ;Kuroda MI
The evolution of sex chromosomes has resulted in numerous species in which females inherit two X chromosomes but males have a single X, thus requiring dosage compensation. MSL (Male-specific lethal) complex increases transcription on the single X chromosome of Drosophila males to equalize expression of X-linked genes between the sexes. The biochemical mechanisms utilized for dosage compensation must function over a wide dynamic range of transcription levels and differential expression patterns. Lucchesi (1998) proposed that MSL complex regulates transcriptional elongation to control dosage compensation, a model subsequently supported by mapping of MSL complex and MSL-dependent H4K16 acetylation to the bodies of X-linked genes in males, with a bias towards 3′ ends. However, experimental analysis of MSL function at the mechanistic level has been challenging due to the small magnitude of the chromosome-wide effect and the lack of an in vitro system for biochemical analysis. In this study, we use global run-on sequencing (GRO-seq) to examine the specific effect of MSL complex on RNA Polymerase II (RNAP II) on a genome-wide level. Results indicate that MSL complex enhances transcription by facilitating the progression of RNAP II across the bodies of active X-linked genes. Improving transcriptional output downstream of typical gene-specific control may explain how dosage compensation can be imposed on the diverse set of genes along an entire chromosome.
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影响因子:
56.9
作者:
Park, Y;Kelley, RL;Meller, VH
通讯作者:
Meller, VH
影响因子:
16.8
作者:
通讯作者:
--
影响因子:
10.5
作者:
Hamada, FN;Park, PJ;Kuroda, MI
通讯作者:
Kuroda, MI
DOI:
10.1126/science.1181421
发表时间:
2010-01-15
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Nechaev S;Fargo DC;dos Santos G;Liu L;Gao Y;Adelman K
通讯作者:
Adelman K
影响因子:
30.8
作者:
Zeitlinger, Julia;Stark, Alexander;Young, Richard A.
通讯作者:
Young, Richard A.