The role of transcriptional activator GATA-1 at human beta-globin HS2.
The role of transcriptional activator GATA-1 at human beta-globin HS2.
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DOI:
10.1093/nar/gkn368
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发表时间:
2008-08
影响因子:
14.9
通讯作者:
Kim A
中科院分区:
文献类型:
--
作者:
Cho Y;Song SH;Lee JJ;Choi N;Kim CG;Dean A;Kim A
GATA-1 is an erythroid activator that binds β-globin gene promoters and DNase I hypersensitive sites (HSs) of the β-globin locus control region (LCR). We investigated the direct role of GATA-1 interaction at the LCR HS2 enhancer by mutating its binding sites within minichromosomes in erythroid cells. Loss of GATA-1 in HS2 did not compromise interaction of NF-E2, a second activator that binds to HS2, nor was DNase I hypersensitivity at HS2 or the promoter of a linked ε-globin gene altered. Reduction of NF-E2 using RNAi confirmed the overall importance of this activator in establishing LCR HSs. However, recruitment of the histone acetyltransferase CBP and RNA pol II to HS2 was diminished by GATA-1 loss. Transcription of ε-globin was severely compromised with loss of RNA pol II from the transcription start site and reduction of H3 acetylation and H3K4 di- and tri-methylation in coding sequences. In contrast, widespread detection of H3K4 mono-methylation was unaffected by loss of GATA-1 in HS2. These results support the idea that GATA-1 interaction in HS2 has a prominent and direct role in co-activator and pol II recruitment conferring active histone tail modifications and transcription activation to a target gene but that it does not, by itself, play a major role in establishing DNase I hypersensitivity.
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影响因子:
14.9
作者:
Kim, AeRi;Song, Sang-hyun;Brand, Marjorie;Dean, Ann
通讯作者:
Dean, Ann
影响因子:
16
作者:
Johnson, KD;Christensen, HM;Bresnick, EH
通讯作者:
Bresnick, EH
DOI:
10.1073/pnas.212389499
发表时间:
2002-10-29
影响因子:
11.1
作者:
Kiekhaefer, CM;Grass, JA;Bresnick, EH
通讯作者:
Bresnick, EH
影响因子:
4.8
作者:
Kooren, Jurgen;Palstra, Robert-Jan;de Laat, Wouter
通讯作者:
de Laat, Wouter
影响因子:
5.3
作者:
Kim, AeRi;Zhao, Hui;Dean, Ann
通讯作者:
Dean, Ann