Abstract:
:Methylation of histone H3 lysine 4 (H3K4) is catalyzed by the multi-component COMPASS or COMPASS-like complex, which is highly conserved from yeast to human, and plays essential roles in gene expression and transcription, cell cycle progression, and DNA repair. Here we present a cryo-EM map of the complete S. cerevisiae COMPASS complex. Through tag or Fab labeling strategy combined with cryo-EM 3D reconstruction and cross-linking and mass spectrometry (XL-MS) analysis, we uncovered new information on the subunit arrangement: Cps50, Cps35, and Cps30 were determined to group together to form the face region in the head of the complex, and Cps40 and the N-terminal portion of Set1 reside on the top of the head. Our map reveals the location of the active center and a canyon in the back of the head. Together, our study provides the first snapshot of the complete architecture of yeast COMPASS and a picture of its subunit interaction network, which could facilitate our understanding of the COMPASS machinery and its functionality.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Wang Y,Ding Z,Liu X,Bao Y,Huang M,Wong CCL,Hong X,Cong Ydoi
10.1038/s41598-018-35609-8subject
Has Abstractpub_date
2018-11-27 00:00:00pages
17405issue
1issn
2045-2322pii
10.1038/s41598-018-35609-8journal_volume
8pub_type
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