Download MendeleyLys11-Linked Ubiquitin Chains Adopt Compact Conformations and are Preferentially Hydrolyzed by the Deubiquitinase Cezanne
Bremm, A., Freund, S.M.V., Komander, D.(2010) Nat Struct Mol Biol 17: 939
- PubMed: 20622874
- DOI: https://doi.org/10.1038/nsmb.1873
- Primary Citation of Related Structures:
2XEW - PubMed Abstract:
Ubiquitin is a versatile cellular signaling molecule that can form polymers of eight different linkages, and individual linkage types have been associated with distinct cellular functions. Though little is currently known about Lys11-linked ubiquitin chains, recent data indicate that they may be as abundant as Lys48 linkages and may be involved in vital cellular processes. Here we report the generation of Lys11-linked polyubiquitin in vitro, for which the Lys11-specific E2 enzyme UBE2S was fused to a ubiquitin binding domain. Crystallographic and NMR analyses of Lys11-linked diubiquitin reveal that Lys11-linked chains adopt compact conformations in which Ile44 is solvent exposed. Furthermore, we identify the OTU family deubiquitinase Cezanne as the first deubiquitinase with Lys11-linkage preference. Our data highlight the intrinsic specificity of the ubiquitin system that extends to Lys11-linked chains and emphasize that differentially linked polyubiquitin chains must be regarded as independent post-translational modifications.
Organizational Affiliation:
Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.
