TitlePrecise domain specification in the developing Drosophila embryo.
Publication TypeJournal Article
Year of Publication2005
AuthorsHouchmandzadeh, B, Wieschaus, E, Leibler, S
JournalPhys Rev E Stat Nonlin Soft Matter Phys
Volume72
Issue6 Pt 1
Pagination061920
Date Published2005 Dec
KeywordsAnimals, Body Patterning, Carrier Proteins, Computer Simulation, Drosophila melanogaster, Drosophila Proteins, Embryo, Nonmammalian, Gene Expression Regulation, Developmental, Models, Biological, Morphogenesis, Tissue Distribution, Transcription Factors
Abstract

A simple morphogen gradient based on the protein bicoid is insufficient to explain the precise (i.e., similar in all embryos) setting of anteroposterior gene expression domains in the early Drosophila embryo. We present here an alternative model, based on quantitative data, which accounts for all of our observations. The model also explains the robustness of hunchback boundary setting in unnatural environments such as published recently [Luccheta, Nature 434, 1134 (2005)]. The model is based on the existence of a secondary gradient correlated to bicoid through protein degradation by the same agent.

Alternate JournalPhys Rev E Stat Nonlin Soft Matter Phys