The general principles that underlie the mechanism of action of the COP9-Signalosome, a key regulator of the largest family of ubiquitin ligase enzymes in human cells, have been identified using structural and kinetic techniques.
Yersinia pseudotuberculosis and enteropathogenic Escherichia coli promote pathogenicity by deamidating the ubiquitin-like protein NEDD8 to block ubiquitin-dependent trafficking of Perforin-2, which is an effector of innate immunity.
A protein interaction screen revealed desmosomes as a scaffold for the COP9 de-neddylating complex, to promote epidermal differentiation by governing the balance of Nedd8 and Ubiquitin modifications on Epidermal Growth Factor Receptor.
The human cytomegalovirus (HCMV) interactome systematically characterises high-confidence viral-viral and viral-host protein interactions in HCMV-infected cells, facilitating multiple novel insights into HCMV and herpesviral function.
Engineered E3 ubiquitin ligases are utilized to elucidate mechanisms underlying ubiquitin regulation of membrane proteins, and to achieve robust post-translational functional knockdown of ion channels.