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Molecular Systems Biology
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Molecular Systems Biology
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https://dx.doi.org/10.5167/uzh...
Other literature type . 2010
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Precision and scaling in morphogen gradient read‐out

Authors: de Lachapelle, A M; Bergmann, S;

Precision and scaling in morphogen gradient read‐out

Abstract

Morphogen gradients infer cell fate as a function of cellular position. Experiments in Drosophila embryos have shown that the Bicoid (Bcd) gradient is precise and exhibits some degree of scaling. We present experimental results on the precision of Bcd target genes for embryos with a single, double or quadruple dose of bicoid demonstrating that precision is highest at mid‐embryo and position dependent, rather than gene dependent. This confirms that the major contribution to precision is achieved already at the Bcd gradient formation. Modeling this dynamic process, we investigate precision for inter‐embryo fluctuations in different parameters affecting gradient formation. Within our modeling framework, the observed precision can only be achieved by a transient Bcd profile. Studying different extensions of our modeling framework reveals that scaling is generally position dependent and decreases toward the posterior pole. Our measurements confirm this trend, indicating almost perfect scaling except for anterior most expression domains, which overcompensate fluctuations in embryo length.

Keywords

Medicine (General), Embryo, Nonmammalian, QH301-705.5, Genes, Insect, 1100 General Agricultural and Biological Sciences, Models, Biological, R5-920, SX00 SystemsX.ch, 2604 Applied Mathematics, SX15 WingX, 1300 General Biochemistry, Genetics and Molecular Biology, morphogen gradients, 2400 General Immunology and Microbiology, Report, Animals, Drosophila Proteins, Biology (General), Bicoid; Drosophila; Morphogen Gradients; Precision; Scaling; Early Drosophila Embryo; Positional Information; Bicoid Gradient; Establishment; Protein; Melanogaster; Proportions; Diffusion; Dynamics; Pattern, bicoid, Homeodomain Proteins, scaling, Gene Expression Regulation, Developmental, Drosophila melanogaster, Trans-Activators, 570 Life sciences; biology, Drosophila, precision

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
39
Top 10%
Top 10%
Top 10%
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