Chemical tools to monitor and control human proteasome activities

Leiden Repository

Chemical tools to monitor and control human proteasome activities

Type: Doctoral Thesis
Title: Chemical tools to monitor and control human proteasome activities
Author: Bruin, G. de
Issue Date: 2016-06-01
Keywords: Proteasome
Inhibitors
Cancer
Immunediseases
Covalent
FRET
Activity-based-probes
Proteins
Peptides
Abstract: Proteasomes are multi-protein, multi-catalytic complexes responsible for the degradation of 80-90% of the proteins inside eukaryotic cells. Proteasomes contain a cylindrical 20S core particle (CP) and one or two 19S regulatory particles (RP). The constitutive proteasome core particle (cCP), which is expressed in all mammalian tissues, contains three catalytically active subunits, namely β1c, β2c and β5c. Lymphoid cells express another proteasome core particle known as the immunoproteasome (iCP). In iCPs, β1c, β2c and β5c are replaced by β1i, β2i and β5i. The research described in this thesis reports on the development of new subunit-selective inhibitors and activity-based probes, on the development of an assay to simultaneously monitor all cCP and iCP catalytic activities and on the development of a method that reports on CP catalytic active subunit composition. The tools that stem from the work described in this thesis can now be used to unravel the role of each individual catalytic subunit in a chemical genetics setting (selective and (near) complete inhibition of each subunit), and to clarify the role of mCPs, in, for instance, antigen presentation and cancer. Furthermore, these tools could possibly serve as leads in the discovery of agents for future treatment of cancer and autoimmune diseases.
Promotor: Supervisors: H.S. Overkleeft; G.A. van der Marel Co-Supervisor: B.I. Florea
Faculty: Science
University: Leiden
Handle: http://hdl.handle.net/1887/39834
 

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