PXD022105-1

PXD022105 is an original dataset announced via ProteomeXchange.

Title	Dimerisation of the PICTS complex via LC8/Cut-up drives co-transcriptional transposon silencing in Drosophila
Description	In animal gonads, the PIWI-interacting RNA (piRNA) pathway guards genome integrity in part through the co-transcriptional gene silencing of transposon insertions. In Drosophila ovaries, piRNA-loaded Piwi detects nascent transposon transcripts and instructs heterochromatin formation through the Panoramix-induced co-transcriptional silencing (PICTS) complex, containing Panoramix, Nxf2 and Nxt1. Here, we report that the highly conserved dynein light chain LC8/Cut-up (Ctp) is an essential component of the PICTS complex. Loss of Ctp results in transposon de-repression and a reduction in repressive chromatin marks specifically at transposon loci. In turn, Ctp can enforce transcriptional silencing when artificially recruited to RNA and DNA reporters. We show that Ctp drives dimerisation of the PICTS complex through its interaction with conserved motifs within Panoramix. Artificial dimerisation of Panoramix bypasses the necessity for its interaction with Ctp, demonstrating that conscription of a protein from a ubiquitous cellular machinery has fulfilled a fundamental requirement for a transposon silencing complex.
HostingRepository	PRIDE
AnnounceDate	2021-01-26
AnnouncementXML	Submission_2021-01-25_22:37:15.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Evelyn Eastwood
SpeciesList	scientific name: Drosophila melanogaster (Fruit fly); NCBI TaxID: 7227;
ModificationList	monohydroxylated residue; deaminated residue
Instrument	Q Exactive

Revision	Datetime	Status	ChangeLog Entry
0	2020-10-21 02:33:19	ID requested
⏵ 1	2021-01-25 22:37:15	announced

Dataset with its publication pending

submitter keyword: Drosophila, piRNA

Gregory Hannon
contact affiliation	Cancer Research UK- Cambridge Institute Li Ka Shing Centre Robinson way Cambridge CB2 0RE UK
contact email	greg.hannon@cruk.cam.ac.uk
lab head
Evelyn Eastwood
contact affiliation	Cancer Research UK Cambridge Institute University of Cambridge
contact email	evelyn.eastwood@cruk.cam.ac.uk
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD022105
     1. Label: PRIDE project
     2. Name: Dimerisation of the PICTS complex via LC8/Cut-up drives co-transcriptional transposon silencing in Drosophila