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  • Journal article

  • Structure of the human Bre1 complex bound to the nucleosome

    • Authors : Onishi, Shuhei  (2023)

  • Histone H2B monoubiquitination (at Lys120 in humans) regulates transcription elongation and DNA repair. In humans, H2B monoubiquitination is catalyzed by the heterodimeric Bre1 complex composed of Bre1A/RNF20 and Bre1B/RNF40. The Bre1 proteins generally function as tumor suppressors, while in certain cancers, they facilitate cancer cell proliferation. To reveal the structural basis of H2BK120 ubiquitination and its regulation, we determined the cryo-EM structure of...
  • Journal article

  • Architecture and regulation of filamentous human cystathionine beta-synthase

    • Authors : McCorvie, Thomas J. (2023)

  • Cystathionine beta-synthase (CBS) is an essential metabolic enzyme across all domains of life involved in the production of glutathione, cysteine, and hydrogen sulphide1-4. Human CBS appends to its conserved catalytic domain a regulatory domain that modulates activity by S-adenosyl-L-methionine (SAM) and promotes oligomerization5-12, however the molecular basis is unknown. Here we show using cryo-electron microscopy that full-length human CBS in the basa...