Remodeling of Regulatory Nucleoprotein Complexes on the Xenopus Hsp70 Promoter During Meiotic Maturation of the Xenopus Oocyte
Overview
Molecular Biology
Authors
Affiliations
Transcriptional repression occurs during meiotic maturation of Xenopus oocytes. Injection of a DNA template containing an hsp70 promoter into Xenopus oocytes, followed by progesterone-induced maturation has been used to demonstrate a dynamic competition between the assembly of transcription factor-containing nucleoprotein complexes and repressive nucleosomal arrays during the maturation process. In particular, it is shown that increased levels of injected heat shock protein, the transcriptional activator Gal4-VP16 or the DNA template itself all lead to reduced repression of transcription on maturation. Conversely, injection of additional histone increases repression. Repression of transcription is shown to be accompanied by the formation of a more regular array of nucleosomes and by an increase in the efficiency of nucleosome assembly on the injected plasmid. Meiotic maturation is therefore accompanied by replacement of transcription factor complexes by a repressive chromatin environment.
The TOP-2/condensin II axis silences transcription during germline specification in C. elegans.
Belew M, Chien E, Wong M, Michael W G3 (Bethesda). 2024; .
PMID: 39358855 PMC: 11631511. DOI: 10.1093/g3journal/jkae236.
Charney R, Forouzmand E, Cho J, Cheung J, Paraiso K, Yasuoka Y Dev Cell. 2017; 40(6):595-607.e4.
PMID: 28325473 PMC: 5434453. DOI: 10.1016/j.devcel.2017.02.017.
Histone ADP-ribosylation facilitates gene transcription by directly remodeling nucleosomes.
Martinez-Zamudio R, Ha H Mol Cell Biol. 2012; 32(13):2490-502.
PMID: 22547677 PMC: 3434492. DOI: 10.1128/MCB.06667-11.
The epigenome in early vertebrate development.
Bogdanovic O, van Heeringen S, Veenstra G Genesis. 2011; 50(3):192-206.
PMID: 22139962 PMC: 3294079. DOI: 10.1002/dvg.20831.
Gene-environment interactions and epigenetic basis of human diseases.
Liu L, Li Y, Tollefsbol T Curr Issues Mol Biol. 2008; 10(1-2):25-36.
PMID: 18525104 PMC: 2434999.