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Quantifying ubiquitin signaling.

Abstract：

:Ubiquitin (UB)-driven signaling systems permeate biology, and are often integrated with other types of post-translational modifications (PTMs), including phosphorylation. Flux through such pathways is dictated by the fractional stoichiometry of distinct modifications and protein assemblies as well as the spatial organization of pathway components. Yet, we rarely understand the dynamics and stoichiometry of rate-limiting intermediates along a reaction trajectory. Here, we review how quantitative proteomic tools and enrichment strategies are being used to quantify UB-dependent signaling systems, and to integrate UB signaling with regulatory phosphorylation events, illustrated with the PINK1/PARKIN pathway. A key feature of ubiquitylation is that the identity of UB chain linkage types can control downstream processes. We also describe how proteomic and enzymological tools can be used to identify and quantify UB chain synthesis and linkage preferences. The emergence of sophisticated quantitative proteomic approaches will set a new standard for elucidating biochemical mechanisms of UB-driven signaling systems.

journal_name

Mol Cell

journal_title

Molecular cell

authors

Ordureau A,Münch C,Harper JW

doi

10.1016/j.molcel.2015.02.020

subject

Has Abstract

pub_date

2015-05-21 00:00:00

pages

660-76

issue

4

eissn

1097-2765

issn

1097-4164

pii

S1097-2765(15)00134-3

journal_volume

58

pub_type

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