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PXD026796

PXD026796 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleA novel SNF2 ATPase complex in Trypanosoma brucei with a role in H2A.Z-mediated chromatin remodelling
DescriptionA cascade of histone acetylation events with subsequent incorporation of a histone H2A variant plays an essential part in transcription regulation in various model organisms. A key player in this cascade is the chromatin remodellling complex SWR1, which replaces the canonical histone H2A with its variant H2A.Z. Transcriptional regulation of polycistronic transcription units in the unicellular parasite Trypanosoma brucei has been shown to be highly dependent on acetylation of H2A.Z, which is mediated by the histone-acetyltransferase HAT2. The chromatin remodellling complex, which mediates H2A.Z incorporation is not known and an SWR1 orthologue in trypanosomes has not yet been reported. In this study, we identified and characterised an SWR1-like remodelller complex in T. brucei that is responsible for Pol II-dependent transcriptional regulation. Bioinformatic analysis of potential SNF2 DEAD/Box helicases, the key component of SWR1 complexes, identified a 1211 amino acids-long protein that exhibits key structural characteristics of the SWR1 subfamily. Systematic protein-protein interaction analysis revealed the existence of a novel complex exhibiting key features of an SWR1-like chromatin remodelller. RNAi-mediated depletion of the ATPase subunit of this complex resulted in a significant reduction of H2A.Z incorporation at transcription start sites and a subsequent decrease of steady-state mRNA levels. Furthermore, depletion of SWR1 and RNA-polymerase II (Pol II) caused massive chromatin condensation. The potential function of several proteins associated with the SWR1-like complex and with HAT2, the key factor of H2A.Z incorporation, is discussed.
HostingRepositoryPRIDE
AnnounceDate2022-08-12
AnnouncementXMLSubmission_2022-08-12_04:18:26.888.xml
DigitalObjectIdentifier
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitterF Butter
SpeciesList scientific name: Oryza sativa (Rice); NCBI TaxID: 4530; scientific name: Trypanosoma brucei; NCBI TaxID: 5691; scientific name: Rhizophagus irregularis; NCBI TaxID: 588596;
ModificationListNo PTMs are included in the dataset
InstrumentQ Exactive
Dataset History
RevisionDatetimeStatusChangeLog Entry
02021-06-18 03:51:59ID requested
12022-08-12 04:18:27announced
Publication List
Vellmer T, Hartleb L, Fradera Sola A, Kramer S, Meyer-Natus E, Butter F, Janzen CJ, A novel SNF2 ATPase complex in Trypanosoma brucei with a role in H2A.Z-mediated chromatin remodelling. PLoS Pathog, 18(6):e1010514(2022) [pubmed]
Keyword List
submitter keyword: LC-MS/MS
Contact List
Falk Butter
contact affiliationIMB, Ackermannweg 4, 55128 Mainz
contact emailf.butter@imb.de
lab head
F Butter
contact affiliationQuantitative Proteomics Institute of Molecular Biology (IMB)
contact emailf.butter@imb-mainz.de
dataset submitter
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Dataset FTP location
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PRIDE project URI
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