PXD035578-1

PXD035578 is an original dataset announced via ProteomeXchange.

Title	Histone chaperone ASF1 mediates H3.3-H4 deposition in Arabidopsis
Description	Histone chaperones and chromatin remodelers control nucleosome dynamics, essential for transcription, replication, and DNA repair. The histone chaperone Anti-Silencing Factor 1 (ASF1) plays a central role in facilitating CAF-1-mediated replication-dependent H3.1 deposition and HIRA-mediated replication-independent H3.3 deposition in yeast and metazoans. Whether ASF1 function is evolutionarily conserved in plants is unknown. Here, we show that Arabidopsis ASF1 proteins display an exclusive preference for the H3.3-depositing HIRA complex. Simultaneous mutation of both Arabidopsis ASF1 genes caused a decrease in chromatin density and ectopic H3.1 occupancy at loci typically enriched with H3.3. Genetic, transcriptomic, and proteomic data indicate that ASF1 proteins strongly prefer the HIRA complex over CAF-1. asf1 mutants also displayed an increase in spurious Pol II transcriptional initiation, and showed defects in the maintenance of gene body CG DNA methylation and in the distribution of histone modifications. Furthermore, ectopic targeting of ASF1 caused excessive histone deposition, less accessible chromatin, and gene silencing. These findings reveal the importance of ASF1-mediated H3.3-H4 deposition via the HIRA pathway for proper epigenetic regulation of the genome.
HostingRepository	PRIDE
AnnounceDate	2022-10-31
AnnouncementXML	Submission_2022-10-30_18:06:29.429.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	YasamanJami-Alahmadi
SpeciesList	scientific name: Arabidopsis thaliana (Mouse-ear cress); NCBI TaxID: 3702;
ModificationList	No PTMs are included in the dataset
Instrument	Orbitrap Fusion Lumos; Orbitrap Fusion

Revision	Datetime	Status	ChangeLog Entry
0	2022-07-25 02:41:45	ID requested
⏵ 1	2022-10-30 18:06:29	announced

Dataset with its publication pending

submitter keyword: Arabidopsis, LCMS, Proteomics

ZhenhuiZhong
contact affiliation	UCLA
contact email	zhenhuizhong@gmail.com
lab head
YasamanJami-Alahmadi
contact affiliation	UCLA
contact email	yjami@ucla.edu
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD035578
     1. Label: PRIDE project
     2. Name: Histone chaperone ASF1 mediates H3.3-H4 deposition in Arabidopsis