Journal
PLANT CELL
Volume 34, Issue 2, Pages 718-741Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/plcell/koab281
Keywords
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Funding
- US National Science Foundation [NSF IOS-1733633, MCB-1822343]
- National Science Foundation (NSF) [IOS-1856627, IOS-2026554, MCB1856143]
- European Commission [GA-316965]
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This review discusses the characteristics, identification technologies, and role of cis-regulatory sequences in plant biology. Despite advances in sequence assembly and genome annotation, there are still challenges in identifying and understanding cis-regulatory modules.
This review discusses the features of cis-regulatory sequences in plants, technologies enabling their identification, characterization, and validation, their organization into functional cis-regulatory modules, their genomic distributions with respect to target genes, and the role of transposable elements in their evolution. The identification and characterization of cis-regulatory DNA sequences and how they function to coordinate responses to developmental and environmental cues is of paramount importance to plant biology. Key to these regulatory processes are cis-regulatory modules (CRMs), which include enhancers and silencers. Despite the extraordinary advances in high-quality sequence assemblies and genome annotations, the identification and understanding of CRMs, and how they regulate gene expression, lag significantly behind. This is especially true for their distinguishing characteristics and activity states. Here, we review the current knowledge on CRMs and breakthrough technologies enabling identification, characterization, and validation of CRMs; we compare the genomic distributions of CRMs with respect to their target genes between different plant species, and discuss the role of transposable elements harboring CRMs in the evolution of gene expression. This is an exciting time to study cis-regulomes in plants; however, significant existing challenges need to be overcome to fully understand and appreciate the role of CRMs in plant biology and in crop improvement.
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