@article{7ecfec9f879e4e93a70d3b49a34443b7,
title = "Activating and repressing gene expression between chromosomes during stochastic fate specification",
abstract = "DNA elements act across long genomic distances to regulate gene expression. During transvection in Drosophila, DNA elements on one allele of a gene act between chromosomes to regulate expression of the other allele. Little is known about the biological roles and developmental regulation of transvection. Here, we study the stochastic expression of spineless (ss) in photoreceptors in the fly eye to understand transvection. We determine a biological role for transvection in regulating expression of naturally occurring ss alleles. We identify DNA elements required for activating and repressing transvection. Different enhancers participate in transvection at different times during development to promote gene expression and specify cell fates. Bringing a silencer element on a heterologous chromosome into proximity with the ss locus “reconstitutes” the gene, leading to repression. Our studies show that transvection regulates gene expression via distinct DNA elements at specific timepoints in development, with implications for genome organization and architecture.",
keywords = "CP: Molecular biology, Drosophila, R7, enhancer, fly, pairing, retina, silencer, spineless, stochastic, transvection",
author = "Urban, {Elizabeth A.} and Chaim Chernoff and Layng, {Kayla Viets} and Jeong Han and Caitlin Anderson and Daniel Konzman and Johnston, {Robert J.}",
note = "Funding Information: We thank the JHU Integrated Imaging Center (IIC). We thank Tatjana Trcek, Jeffry Corden, Lukas Voortman, Katarzyna Hussey, and the members of the Johnston lab for helpful comments and insights on the project and manuscript. This work was supported by NIH F31EY031963 (E.U.), NIH 1F31EY026786 (K.V.L.), and NIH R01EY025598 (R.J.J.). Funding Information: We thank the JHU Integrated Imaging Center (IIC). We thank Tatjana Trcek, Jeffry Corden, Lukas Voortman, Katarzyna Hussey, and the members of the Johnston lab for helpful comments and insights on the project and manuscript. This work was supported by NIH F31EY031963 (E.U.), NIH 1F31EY026786 (K.V.L.), and NIH R01EY025598 (R.J.J.). E.A.U. - Conceptualization, methodology, validation, formal analysis, investigation, writing – original draft, writing – review & editing, visualization, supervision. C.C. – Conceptualization, methodology, validation, investigation, writing – review & editing, visualization. K.V.L. – Conceptualization, methodology, investigation, writing – original draft, writing – review & editing, visualization, supervision. J.H. – Investigation, visualization. C.A. – Investigation. D.K. – Investigation. R.J.J. Jr. – Conceptualization, investigation, writing – original draft, writing – review & editing, supervision, project administration, funding acquisition. The authors declare no competing interests. Publisher Copyright: {\textcopyright} 2022 The Authors",
year = "2023",
month = jan,
day = "31",
doi = "10.1016/j.celrep.2022.111910",
language = "English (US)",
volume = "42",
journal = "Cell Reports",
issn = "2211-1247",
publisher = "Cell Press",
number = "1",
}