Neuroblast-specific chromatin landscapes allows the integration of spatial and temporal cues during Drosophila neurogenesis
File(s)elife-44036-v2.pdf (4.62 MB)
Published version
Author(s)
Sen, Sonia Q
Chanchani, Sachin
Southall, Tony D
Doe, Chris Q
Type
Journal Article
Abstract
<jats:p>Spatial and temporal cues are required to specify neuronal diversity, but how these cues are integrated in neural progenitors remains unknown. Drosophila progenitors (neuroblasts) are a good model: they are individually identifiable with relevant spatial and temporal transcription factors known. Here we test whether spatial/temporal factors act independently or sequentially in neuroblasts. We used Targeted-DamID to identify genomic binding sites of the Hunchback temporal factor in two neuroblasts (NB5-6 and NB7-4) that make different progeny. Hunchback targets were different in each neuroblast, ruling out the independent specification model. Moreover, each neuroblast had distinct open chromatin domains, which correlated with differential Hb-bound loci in each neuroblast. Importantly, Gsb/Pax3 spatial factor binding correlated with open chromatin in NB5-6, but not NB7-4. Our data support a model in which early-acting spatial factors establish neuroblast-specific open chromatin domains, leading to neuroblast-specific temporal factor binding and the production of different neurons in each neuroblast lineage.</jats:p>
Date Issued
2019-01-29
Date Acceptance
2019-01-24
Citation
eLife, 8
Publisher
eLife Sciences Publications, Ltd
Journal / Book Title
eLife
Volume
8
Copyright Statement
© 2019 Sen et al. This article is distributed under the
terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which
permits unrestricted use and redistribution provided that the original author and source are credited.
terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which
permits unrestricted use and redistribution provided that the original author and source are credited.
Sponsor
Wellcome Trust
Grant Number
104567/Z/14/Z
Subjects
D. melanogaster
DamID
chromatin
developmental biology
neuroblast
neuroscience
spatial patterning
stem cell
temporal identity
Publication Status
Published online
OA Location
https://elifesciences.org/articles/44036
Date Publish Online
2019-01-29