Tip60 complex promotes expression of a differentiation factor to regulate germline differentiation in female Drosophila

Molecular Biology of the Cell
Alicia McCarthyPrashanth Rangan

Abstract

Germline stem cells (GSCs) self-renew and differentiate to sustain a continuous production of gametes. In the female Drosophila germ line, two differentiation factors, bag of marbles ( bam) and benign gonial cell neoplasm ( bgcn), work in concert in the stem cell daughter to promote the generation of eggs. In GSCs, bam transcription is repressed by signaling from the niche and is activated in stem cell daughters. In contrast, bgcn is transcribed in both the GSCs and stem cell daughters, but little is known about how bgcn is transcriptionally modulated. Here we find that the conserved protein Nipped-A acts through the Tat interactive protein 60-kDa (Tip60) histone acetyl transferase complex in the germ line to promote GSC daughter differentiation. We find that Nipped-A is required for efficient exit from the gap phase 2 (G2) of cell cycle of the GSC daughter and for expression of a differentiation factor, bgcn. Loss of Nipped-A results in accumulation of GSC daughters . Forced expression of bgcn in Nipped-A germline-depleted ovaries rescues this differentiation defect. Together, our results indicate that Tip60 complex coordinates cell cycle progression and expression of bgcn to help drive GSC daughters toward a differentiation p...Continue Reading

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Citations

Sep 24, 2020·International Journal of Molecular Sciences·Wenmei WuLing Tian
Jul 28, 2020·Biochimica Et Biophysica Acta. Gene Regulatory Mechanisms·Carme Nuño-Cabanes, Susana Rodríguez-Navarro
Feb 22, 2021·Developmental Biology·Velinda Vidaurre, Xin Chen
May 15, 2021·Current Biology : CB·Patrick BlattPrashanth Rangan
Dec 9, 2021·Development·Alicia McCarthyPrashanth Rangan

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Datasets Mentioned

BETA
GSE119328

Methods Mentioned

BETA
acetylating
acetylation
ChIPseq
histone acetylation
RNAseq

Software Mentioned

HISAT2
featureCounts
UCSC
edgeR
Prism
EVOS
Fiji
GraphPad
pym
Panther

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