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
复制标题
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
中科院分区:
文献类型:
--
作者:
S. Hanes;G. Riddihough;D. Ish;R. Brent
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.
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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
影响因子:
10.5
作者:
SMALL, S;KRAUT, R;LEVINE, M
通讯作者:
LEVINE, M
影响因子:
10.5
作者:
LAI, JS;CLEARY, MA;HERR, W
通讯作者:
HERR, W
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
影响因子:
10.5
作者:
POMERANTZ, JL;KRISTIE, TM;SHARP, PA
通讯作者:
SHARP, PA