Mol Cell. 2018 Apr 5;70(1):150-164.e6. doi: 10.1016/j.molcel.2018.02.023. Epub 2018 Mar 22.
Discovery and Characterization of ZUFSP/ZUP1, a Distinct Deubiquitinase Class Important for Genome Stability.
Kwasna D1, Abdul Rehman SA1, Natarajan J1, Matthews S1, Madden R1, De Cesare V1, Weidlich S1, Virdee S1, Ahel I2, Gibbs-Seymour I3, Kulathu Y4.
Abstract
Deubiquitinating
enzymes (DUBs) are important regulators of ubiquitin signaling. Here,
we report the discovery of deubiquitinating activity in ZUFSP/C6orf113.
High-resolution crystal structures of ZUFSP in complex with ubiquitin
reveal several distinctive features of ubiquitin recognition and
catalysis. Our analyses reveal that ZUFSP is a novel DUB with no
homology to any known DUBs, leading us to classify ZUFSP as the seventh
DUB family. Intriguingly, the minimal catalytic domain does not cleave
polyubiquitin. We identify two ubiquitin binding domains in ZUFSP: a ZHA
(ZUFSP helical arm) that binds to the distal ubiquitin and an atypical
UBZ domain in ZUFSP that binds to polyubiquitin. Importantly, both
domains are essential for ZUFSP to selectively cleave K63-linked
polyubiquitin. We show that ZUFSP localizes to DNA lesions, where it
plays an important role in genome stability pathways, functioning to
prevent spontaneous DNA damage and also promote cellular survival in
response to exogenous DNA damage.
Copyright © 2018 The Authors. Published by Elsevier Inc. All rights reserved.
KEYWORDS:
DNA damage response; DNA repair; DUB; Lys63 chains; deubiquitinating enzyme; polyubiquitin; ubiquitin signaling; uniquitin binding domainComment in
- PMID:
- 29576527
- PMCID:
- PMC5896202
- DOI:
- 10.1016/j.molcel.2018.02.023
- [Indexed for MEDLINE]
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