Loading...
Thumbnail Image
Publication

Patterns and mechanisms of ancestral histone protein inheritance in budding yeast

Radman-Livaja, Marta
Verzijlbergen, Kitty F.
Weiner, Assaf
van Welsem, Tibor
Friedman, Nir
Rando, Oliver J.
van Leeuwen, Fred
Embargo Expiration Date
Link to Full Text
Abstract

Replicating chromatin involves disruption of histone-DNA contacts and subsequent reassembly of maternal histones on the new daughter genomes. In bulk, maternal histones are randomly segregated to the two daughters, but little is known about the fine details of this process: do maternal histones re-assemble at preferred locations or close to their original loci? Here, we use a recently developed method for swapping epitope tags to measure the disposition of ancestral histone H3 across the yeast genome over six generations. We find that ancestral H3 is preferentially retained at the 5' ends of most genes, with strongest retention at long, poorly transcribed genes. We recapitulate these observations with a quantitative model in which the majority of maternal histones are reincorporated within 400 bp of their pre-replication locus during replication, with replication-independent replacement and transcription-related retrograde nucleosome movement shaping the resulting distributions of ancestral histones. We find a key role for Topoisomerase I in retrograde histone movement during transcription, and we find that loss of Chromatin Assembly Factor-1 affects replication-independent turnover. Together, these results show that specific loci are enriched for histone proteins first synthesized several generations beforehand, and that maternal histones re-associate close to their original locations on daughter genomes after replication. Our findings further suggest that accumulation of ancestral histones could play a role in shaping histone modification patterns.

Source

Radman-Livaja M, Verzijlbergen KF, Weiner A, van Welsem T, Friedman N, et al. (2011) Patterns and Mechanisms of Ancestral Histone Protein Inheritance in Budding Yeast. PLoS Biol 9(6): e1001075. doi:10.1371/journal.pbio.1001075. Link to article on publisher's site

Year of Medical School at Time of Visit
Sponsors
Dates of Travel
DOI
10.1371/journal.pbio.1001075
PubMed ID
21666805
Other Identifiers
Notes
Funding and Acknowledgements
Corresponding Author
Related Resources
Related Resources
Repository Citation
Rights
Copyright: © 2011 Radman-Livaja et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Distribution License