Structure and cis‐regulatory analysis of a Drosophila grainyhead neuroblast enhancer

Structure and cis‐regulatory analysis of a Drosophila grainyhead neuroblast enhancer Evolutionary analysis of cis‐regulatory DNA reveals that enhancers consist of clusters of conserved sequence blocks (CSBs) that are made up of both unique and repeated sequence elements. This study seeks to address the basis for spatial and temporal regulation of neuroblas. A search for temporally restricted CNS NB enhancers identified one within the transcription factor grainyhead (grh) gene locus. The intronic enhancer, grh‐15, contains two separable semi‐autonomous activities, one that drives expression predominantly within the developing brain NBs and another in ventral cord NBs. To gain insight into the function of the CSBs constituting the brain‐specific enhancer, we have systematically deleted each CSB and compared the activity of the altered enhancer to that of the full brain‐specific enhancer. While our results indicate that information regulating enhancer activity is highly redundant, we have found that individual CSBs convey expression in subsets of larval lineages that are generated from either Type I or Type II NBs. These studies also highlight how evolutionary sequence conservation can be used as a guide the functional analysis of cis‐regulatory DNA. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Genesis: the Journal of Genetics and Development (Formerly Developmental Genetics) Wiley

Structure and cis‐regulatory analysis of a Drosophila grainyhead neuroblast enhancer

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Publisher
Wiley Subscription Services, Inc., A Wiley Company
Copyright
© 2018 Wiley Periodicals, Inc.
ISSN
1526-954X
eISSN
1526-968X
D.O.I.
10.1002/dvg.23094
Publisher site
See Article on Publisher Site

Abstract

Evolutionary analysis of cis‐regulatory DNA reveals that enhancers consist of clusters of conserved sequence blocks (CSBs) that are made up of both unique and repeated sequence elements. This study seeks to address the basis for spatial and temporal regulation of neuroblas. A search for temporally restricted CNS NB enhancers identified one within the transcription factor grainyhead (grh) gene locus. The intronic enhancer, grh‐15, contains two separable semi‐autonomous activities, one that drives expression predominantly within the developing brain NBs and another in ventral cord NBs. To gain insight into the function of the CSBs constituting the brain‐specific enhancer, we have systematically deleted each CSB and compared the activity of the altered enhancer to that of the full brain‐specific enhancer. While our results indicate that information regulating enhancer activity is highly redundant, we have found that individual CSBs convey expression in subsets of larval lineages that are generated from either Type I or Type II NBs. These studies also highlight how evolutionary sequence conservation can be used as a guide the functional analysis of cis‐regulatory DNA.

Journal

Genesis: the Journal of Genetics and Development (Formerly Developmental Genetics)Wiley

Published: Jan 1, 2018

Keywords: ; ; ; ; ; ;

References

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