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2018 ; 70
(1
): 150-164.e6
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Discovery and Characterization of ZUFSP/ZUP1, a Distinct Deubiquitinase Class
Important for Genome Stability
#MMPMID29576527
Kwasna D
; Abdul Rehman SA
; Natarajan J
; Matthews S
; Madden R
; De Cesare V
; Weidlich S
; Virdee S
; Ahel I
; Gibbs-Seymour I
; Kulathu Y
Mol Cell
2018[Apr]; 70
(1
): 150-164.e6
PMID29576527
show ga
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.