Deciphering the regulatory logic of a Drosophila enhancer through systematic sequence mutagenesis and quantitative image analysis

Item Type:	Preprint
Title:	Deciphering the regulatory logic of a Drosophila enhancer through systematic sequence mutagenesis and quantitative image analysis
Creators Name:	Le Poul, Y. and Xin, Y. and Ling, L. and Mühling, B. and Jaenichen, R. and Hörl, D. and Bunk, D. and Harz, H. and Leonhardt, H. and Wang, Y. and Osipova, E. and Museridze, M. and Dharmadhikari, D. and Murphy, E. and Rohs, R. and Preibisch, S. and Prud'homme, B. and Gompel, N.
Abstract:	Transcriptional enhancers are short DNA sequences controlling the spatial activity, timing and levels of eukaryotic gene transcription. Their quantitative transcriptional output is thought to result from the number and organization of transcription factor binding sites (TFBSs). Yet, how the various aspects of regulatory information are encoded in enhancer sequences remains elusive. We addressed this question by quantifying the spatial activity of the yellow spot enhancer active in developing Drosophila wings. To identify which enhancer DNA sequence contributes to enhancer activity, we introduced systematic mutations along the enhancer. We developed an analytic framework that uses comprehensive descriptors to quantify reporter assay in transgenic flies and measure spatial variations in activity levels across the wing. Our analysis highlights an unexpected density of regulatory information in the spot enhancer sequence. Furthermore, it reveals an unanticipated regulatory logic underlying the activity of this enhancer, and how it reads the wing trans-regulatory landscape to encode a spatial pattern.
Keywords:	Animals, Drosophila
Source:	bioRxiv
Publisher:	Cold Spring Harbor Laboratory Press
Article Number:	2020.06.24.169748
Date:	25 June 2020
Official Publication:	https://doi.org/10.1101/2020.06.24.169748

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