Download MendeleyMolecular Basis for DPY-30 Association to COMPASS-like and NURF Complexes.
Tremblay, V., Zhang, P., Chaturvedi, C.P., Thornton, J., Brunzelle, J.S., Skiniotis, G., Shilatifard, A., Brand, M., Couture, J.F.(2014) Structure 22: 1821-1830
- PubMed: 25456412
- DOI: https://doi.org/10.1016/j.str.2014.10.002
- Primary Citation of Related Structures:
4RIQ - PubMed Abstract:
DPY-30 is a subunit of mammalian COMPASS-like complexes (complex of proteins associated with Set1) and regulates global histone H3 Lys-4 trimethylation. Here we report structural evidence showing that the incorporation of DPY-30 into COMPASS-like complexes is mediated by several hydrophobic interactions between an amphipathic α helix located on the C terminus of COMPASS subunit ASH2L and the inner surface of the DPY-30 dimerization/docking (D/D) module. Mutations impairing the interaction between ASH2L and DPY-30 result in a loss of histone H3K4me3 at the β locus control region and cause a delay in erythroid cell terminal differentiation. Using overlay assays, we defined a consensus sequence for DPY-30 binding proteins and found that DPY-30 interacts with BAP18, a subunit of the nucleosome remodeling factor complex. Overall, our results indicate that the ASH2L/DPY-30 complex is important for cell differentiation and provide insights into the ability of DPY-30 to associate with functionally divergent multisubunit complexes.
Organizational Affiliation:
Ottawa Institute of Systems Biology, Department of Biochemistry, Microbiology and Immunology, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada.
