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Cryo-EM studies reveal that RYBP–PRC1 uses two distinct interfaces for binding unmodified and H2Aub1-modified nucleosomes. These binding modes enable the complex to generate H2Aub1 chromatin domains by a read–write mechanism.
The biogenesis and recycling of the ‘heart’ of the human spliceosome, the U5 small nuclear ribonucleoprotein (snRNP), requires CD2BP2 and TSSC4. Here the authors present cryo-electron microscopy structures that reveal how these protein chaperones orchestrate the ATP-independent (re)generation of the U5 snRNP.
Using deep mutational scanning, the authors uncover the functional consequence of missense mutations in ARID1B, a subunit of the SWI/SNF chromatin remodeling complex that is frequently mutated in human Coffin–Siris syndrome and in cancer.
Structures of complete extracellular receptor assemblies mediated by the pro-inflammatory cytokines IL-12 and IL-23 reveal key commonalities and diverse features, with only IL-12 juxtaposing receptor domains proximal to the cell membrane.
