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.
- Daria Riabov Bassat
- Supapat Visanpattanasin
- Clemens Plaschka