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Regulated Protein Degradation

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Evaluation of Substrate Ubiquitylation by E3 Ubiquitin-ligase in Mammalian Cell Lysates

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Measuring APC/C-Dependent Ubiquitylation In Vitro.

Marc A Jarvis¹, Nicholas G Brown, Edmond R Watson

¹Research Institute of Molecular Pathology (IMP), Vienna Biocenter (VBC), Dr. Bohrgasse 7, 1030, Vienna, Austria.

Methods in Molecular Biology (Clifton, N.J.)

|August 10, 2015

Summary

This summary is machine-generated.

Researchers developed new methods to purify and analyze the anaphase-promoting complex/cyclosome (APC/C). This advancement enables better understanding of cell cycle control and protein degradation by the APC/C complex.

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Area of Science:

Cell Biology
Molecular Biology
Biochemistry

Background:

The anaphase-promoting complex/cyclosome (APC/C) is a large ubiquitin ligase crucial for cell cycle progression.
APC/C targets key proteins for degradation, controlling chromosome segregation and mitotic exit.
Previous limitations included difficulties in obtaining sufficient purified APC/C and generating mutants.

Purpose of the Study:

To review recent advances in the production and purification of recombinant human APC/C and its co-activators.
To describe methods compatible with mutagenesis for APC/C research.
To present a quantitative assay for analyzing APC/C activity.

Main Methods:

Generation and purification of scalable, recombinant human APC/C and co-activator complexes.
Utilizing mutagenesis for functional studies of APC/C.
Employing fluorescently labeled substrate proteins for quantitative activity assays.

Main Results:

Successful development of scalable methods for producing purified recombinant human APC/C.
Establishment of techniques compatible with mutagenesis for APC/C studies.
Implementation of a quantitative assay for measuring APC/C ubiquitylation activity.

Conclusions:

Recent advances facilitate in vitro analysis of APC/C function.
New methods enable the study of APC/C substrate recruitment and ubiquitylation.
These tools are essential for understanding APC/C regulation in cell cycle control.