Specific DNA recognition and intersite spacing are critical for action of the bicoid morphogen

Specific DNA recognition and intersite spacing are critical for action of the bicoid morphogen
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特定的 DNA 识别和位点间距对于双样形态发生素的作用至关重要

DOI:
10.1128/mcb.14.5.3364-3375.1994
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发表时间:
1994
影响因子:
5.3
通讯作者:
R. Brent
R. Brent
中科院分区:
生物学2区
文献类型:
--
作者:
S. Hanes;G. Riddihough;D. Ish;R. Brent

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我们研究了Bicoid的DNA位点识别及其对果蝇胚胎发育模式形成的重要性。使用改变的DNA特异性Bicoid突变体和适当的报告基因,我们表明,Bicoid区分相关的DNA结合位点在体内由其识别α-螺旋(赖氨酸50同源结构域)的氨基酸9和bp 7的网站之间的特定接触。这一结果与我们早期使用酿酒酵母的结果一致,但与另一种同源结构域-DNA相互作用的晶体学分析预测的结果不同。我们的研究结果还表明,Bicoid直接结合到那些基因的转录,它调节和氨基酸9接触是必不可少的Bicoid直接前模式的形成。在果蝇胚胎和酵母细胞中,Bicoid需要多个结合位点来激活靶基因的转录。我们发现,结合位点之间的距离是Bicoid激活的关键,但出乎意料的是,这一关键距离在果蝇和S。啤酒。这一结果表明,Bicoid在果蝇中的激活可能需要一种在S.啤酒。
We examined DNA site recognition by Bicoid and its importance for pattern formation in developing Drosophila embryos. Using altered DNA specificity Bicoid mutants and appropriate reporter genes, we show that Bicoid distinguishes among related DNA-binding sites in vivo by a specific contact between amino acid 9 of its recognition alpha-helix (lysine 50 of the homeodomain) and bp 7 of the site. This result is consistent with our earlier results using Saccharomyces cerevisiae but differs from that predicted by crystallographic analysis of another homeodomain-DNA interaction. Our results also demonstrate that Bicoid binds directly to those genes whose transcription it regulates and that the amino acid 9 contact is necessary for Bicoid to direct anterior pattern formation. In both Drosophila embryos and yeast cells, Bicoid requires multiple binding sites to activate transcription of target genes. We find that the distance between binding sites is critical for Bicoid activation but that, unexpectedly, this critical distance differs between Drosophila and S. cerevisiae. This result suggests that Bicoid activation in Drosophila might require an ancillary protein(s) not present in S. cerevisiae.
合成的同源域结合位点在果蝇胚胎中充当细胞类型特异性、启动子特异性增强子。
DOI: 10.1002/j.1460-2075.1990.tb07438.x
发表时间: 1990
期刊: The EMBO journal
影响因子: --
作者:
Vincent,JP;Kassis,JA;O'Farrell,PH
通讯作者: O'Farrell,PH
DOI: 10.1101/gad.5.5.827
发表时间: 1991-05-01
影响因子: 10.5
作者:
SMALL, S;KRAUT, R;LEVINE, M
通讯作者: LEVINE, M
DOI: 10.1101/gad.6.11.2058
发表时间: 1992-11-01
影响因子: 10.5
作者:
LAI, JS;CLEARY, MA;HERR, W
通讯作者: HERR, W
梯度场和同源框基因。
DOI: 10.1242/dev.112.3.669
发表时间: 1991
期刊: Development (Cambridge, England)
影响因子: --
作者:
DeRobertis,EM;Morita,EA;Cho,KW
通讯作者: Cho,KW
DOI: 10.1101/gad.6.11.2047
发表时间: 1992-11-01
影响因子: 10.5
作者:
POMERANTZ, JL;KRISTIE, TM;SHARP, PA
通讯作者: SHARP, PA