PUBLICATION
The miR-430 locus with extreme promoter density forms a transcription body during the minor wave of zygotic genome activation
- Authors
- Hadzhiev, Y., Wheatley, L., Cooper, L., Ansaloni, F., Whalley, C., Chen, Z., Finaurini, S., Gustincich, S., Sanges, R., Burgess, S., Beggs, A., Müller, F.
- ID
- ZDB-PUB-230125-5
- Date
- 2023
- Source
- Developmental Cell 58: 155170.e8155-170.e8 (Journal)
- Registered Authors
- Burgess, Shawn, Hadzhiev, Yavor, Müller, Ferenc
- Keywords
- RNA Pol II, core promoter features, miR-430, minor wave, transcription body, zygotic genome activation
- MeSH Terms
-
- Animals
- Gene Expression Regulation, Developmental
- MicroRNAs*/genetics
- RNA Polymerase II/genetics
- Transcription, Genetic*
- Zebrafish/genetics
- Zygote
- PubMed
- 36693321 Full text @ Dev. Cell
Citation
Hadzhiev, Y., Wheatley, L., Cooper, L., Ansaloni, F., Whalley, C., Chen, Z., Finaurini, S., Gustincich, S., Sanges, R., Burgess, S., Beggs, A., Müller, F. (2023) The miR-430 locus with extreme promoter density forms a transcription body during the minor wave of zygotic genome activation. Developmental Cell. 58:155170.e8155-170.e8.
Abstract
In anamniote embryos, the major wave of zygotic genome activation starts during the mid-blastula transition. However, some genes escape global genome repression, are activated substantially earlier, and contribute to the minor wave of genome activation. The mechanisms underlying the minor wave of genome activation are little understood. We explored the genomic organization and cis-regulatory mechanisms of a transcription body, in which the minor wave of genome activation is first detected in zebrafish. We identified the miR-430 cluster as having excessive copy number and the highest density of Pol-II-transcribed promoters in the genome, and this is required for forming the transcription body. However, this transcription body is not essential for, nor does it encompasse, minor wave transcription globally. Instead, distinct minor-wave-specific promoter architecture suggests that promoter-autonomous mechanisms regulate the minor wave of genome activation. The minor-wave-specific features also suggest distinct transcription initiation mechanisms between the minor and major waves of genome activation.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping