Synthesis of isomeric phosphoubiquitin chains reveals that phosphorylation controls deubiquitinase activity and specificity

Nicolas Huguenin-Dezot, Virginia De Cesare, Julien Peltier, Axel Knebel, Yosua Adi Kristariyanto, Daniel T. Rogerson, Yogesh Kulathu, Matthias Trost (Lead / Corresponding author), Jason W. Chin (Lead / Corresponding author)

Research output: Contribution to journalArticle

25 Citations (Scopus)
147 Downloads (Pure)

Abstract

Ubiquitin is post-translationally modified by phosphorylation at several sites, but the consequences of these modifications are largely unknown. Here we synthesize multi-milligram quantities of ubiquitin phosphorylated at serine 20, serine 57 and serine 65 via genetic code expansion. We use these phosphoubiquitins for the enzymatic assembly of twenty isomeric phospho-ubiquitin dimers, with different sites of isopeptide linkage and/or phosphorylation. We discover that phosphorylation of serine 20 on ubiquitin converts UBE3C from a dual specificity E3 ligase into a ligase that primarily synthesizes K48 chains. We profile the activity of 31 deubiquitinases on the isomeric phosphoubiquitin dimers in 837 reactions, and discover that phosphorylation at distinct sites in ubiquitin can activate or repress cleavage of a particular linkage by deubiquitinases, and that phosphorylation at a single site in ubiquitin can control the specificity of deubiquitinases for distinct ubiquitin linkages.
Original languageEnglish
Pages (from-to)1180-1193
Number of pages14
JournalCell Reports
Volume16
Issue number4
DOIs
Publication statusPublished - 26 Jul 2016

Fingerprint Dive into the research topics of 'Synthesis of isomeric phosphoubiquitin chains reveals that phosphorylation controls deubiquitinase activity and specificity'. Together they form a unique fingerprint.

  • Cite this