Mechanism of activation and regulation of deubiquitinase activity in MINDY1 and MINDY2.
Mechanism of activation and regulation of deubiquitinase activity in MINDY1 and MINDY2.
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DOI:
10.1016/j.molcel.2021.08.024
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发表时间:
2021-10-21
期刊:
影响因子:
16
通讯作者:
Kulathu Y
中科院分区:
文献类型:
--
作者:
Abdul Rehman SA;Armstrong LA;Lange SM;Kristariyanto YA;Gräwert TW;Knebel A;Svergun DI;Kulathu Y
Of the eight distinct polyubiquitin (polyUb) linkages that can be assembled, the roles of K48-linked polyUb (K48-polyUb) are the most established, with K48-polyUb modified proteins being targeted for degradation. MINDY1 and MINDY2 are members of the MINDY family of deubiquitinases (DUBs) that have exquisite specificity for cleaving K48-polyUb, yet we have a poor understanding of their catalytic mechanism. Here, we analyze the crystal structures of MINDY1 and MINDY2 alone and in complex with monoUb, di-, and penta-K48-polyUb, identifying 5 distinct Ub binding sites in the catalytic domain that explain how these DUBs sense both Ub chain length and linkage type to cleave K48-polyUb chains. The activity of MINDY1/2 is inhibited by the Cys-loop, and we find that substrate interaction relieves autoinhibition to activate these DUBs. We also find that MINDY1/2 use a non-canonical catalytic triad composed of Cys-His-Thr. Our findings highlight multiple layers of regulation modulating DUB activity in MINDY1 and MINDY2. The catalytic domain of MINDY1/2 has five distinct Ub binding sites Dynamics of the Cys loop regulate DUB activity Non-canonical catalytic triad composed of Cys-His-Thr MINDY1/2 uses an exo- or endo-cleavage mode that is determined by Ub chain length Abdul Rehman et al. uncover multiple layers of regulation of MINDY1 and MINDY2, two recently discovered K48-specific deubiquitinases. They report that MINDY1/2 uses a non-canonical catalytic mechanism, and its catalytic domain has five distinct ubiquitin binding sites, which establishes a polyUb length-dependent cleavage mode.
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影响因子:
16
作者:
Békés M;van der Heden van Noort GJ;Ekkebus R;Ovaa H;Huang TT;Lima CD
通讯作者:
Lima CD
影响因子:
14.9
作者:
Altenhoff AM;Train CM;Gilbert KJ;Mediratta I;Mendes de Farias T;Moi D;Nevers Y;Radoykova HS;Rossier V;Warwick Vesztrocy A;Glover NM;Dessimoz C
通讯作者:
Dessimoz C
DOI:
10.1042/bj20141170
发表时间:
2015-06-01
期刊:
The Biochemical journal
影响因子:
--
作者:
Békés M;Rut W;Kasperkiewicz P;Mulder MP;Ovaa H;Drag M;Lima CD;Huang TT
通讯作者:
Huang TT
影响因子:
6.1
作者:
Blanchet CE;Spilotros A;Schwemmer F;Graewert MA;Kikhney A;Jeffries CM;Franke D;Mark D;Zengerle R;Cipriani F;Fiedler S;Roessle M;Svergun DI
通讯作者:
Svergun DI
影响因子:
64.5
作者:
Hu, M;Li, PW;Shi, YG
通讯作者:
Shi, YG