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Odd-paired controls frequency doubling in Drosophila segmentation by altering the pair-rule gene regulatory network

Published version
Peer-reviewed

Type

Article

Change log

Abstract

The Drosophila embryo transiently exhibits a double-segment periodicity, defined by the expression of seven 'pair-rule' genes, each in a pattern of seven stripes. At gastrulation, interactions between the pair-rule genes lead to frequency doubling and the patterning of 14 parasegment boundaries. In contrast to earlier stages of Drosophila anteroposterior patterning, this transition is not well understood. By carefully analysing the spatiotemporal dynamics of pair-rule gene expression, we demonstrate that frequency-doubling is precipitated by multiple coordinated changes to the network of regulatory interactions between the pair-rule genes. We identify the broadly expressed but temporally patterned transcription factor, Odd-paired (Opa/Zic), as the cause of these changes, and show that the patterning of the even-numbered parasegment boundaries relies on Opa-dependent regulatory interactions. Our findings indicate that the pair-rule gene regulatory network has a temporally modulated topology, permitting the pair-rule genes to play stage-specific patterning roles.

Description

Keywords

D. melanogaster, Odd-paired, Zic, computational biology, developmental biology, gene regulatory network, pair-rule genes, patterning, segmentation, stem cells, systems biology

Journal Title

eLife

Conference Name

Journal ISSN

2050-084X
2050-084X

Volume Title

5

Publisher

eLife Sciences Publications Ltd
Sponsorship
BBSRC (1221578)
This work was supported by a BBSRC PhD studentship to Erik Clark.
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