Projects per year
Polyubiquitin chains regulate diverse cellular processes through the ability of ubiquitin to form chains of eight different linkage types. Although detected in yeast and mammals, little is known about K29-linked polyubiquitin. Here we report the generation of K29 chains in vitro using a ubiquitin chain-editing complex consisting of the HECT E3 ligase UBE3C and the deubiquitinase vOTU. We determined the crystal structure of K29-linked diubiquitin, which adopts an extended conformation with the hydrophobic patches on both ubiquitin moieties exposed and available for binding. Indeed, the crystal structure of the NZF1 domain of TRABID in complex with K29 chains reveals a binding mode that involves the hydrophobic patch on only one of the ubiquitin moieties and exploits the flexibility of K29 chains to achieve linkage selective binding. Further, we establish methods to study K29-linked polyubiquitin and find that K29 linkages exist in cells within mixed or branched chains containing other linkages.
|Number of pages||12|
|Early online date||5 Mar 2015|
|Publication status||Published - 2 Apr 2015|
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- 1 Finished
State-of-the-Art Facilities for Structural Biology at the University of Dundee
Hunter, B., Lilley, D., Owen-Hughes, T., Wyatt, P. & van Aalten, D.
1/03/12 → 28/02/17
Mechanism underlying linkage-selective polyubiquitin recognitionAuthor: Kristariyanto, Y. A., 2017
Supervisor: Kulathu, Y. (Supervisor)
Student thesis: Doctoral Thesis › Doctor of PhilosophyFile