Physical and Functional Analysis of the Putative Rpn13 Inhibitor RA190.
Physical and Functional Analysis of the Putative Rpn13 Inhibitor RA190.
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假定RPN13抑制剂RA190的物理和功能分析。
DOI:
10.1016/j.chembiol.2020.08.007
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发表时间:
2020-11-19
影响因子:
8.6
通讯作者:
Kodadek T
中科院分区:
文献类型:
--
作者:
Dickson P;Abegg D;Vinogradova E;Takaya J;An H;Simanski S;Cravatt BF;Adibekian A;Kodadek T
Rpn13 is one of several ubiquitin receptors in the 26S proteasome. Cys88 of Rpn13 has been proposed to be the principal target of RA190, an electrophilic small molecule with interesting anti-cancer activities. Here, we examine the claim that RA190 mediates its cytotoxic effects through engagement with Rpn13. We find no evidence that this is the case. In vitro, RA190 is has no measurable effect on any of the known interactions of Rpn13. In cellulo, we see no physical engagement of Rpn13 by RA190, either on C88 or any other residue. However, chemical proteomics experiments in two different cell lines reveal that dozens of other proteins are heavily engaged by RA190. Finally, increasing or reducing the level of Rpn13 in HeLa and melanoma cells had no effect on the sensitivity of HeLa or melanoma cells to RA190. We conclude that Rpn13 is not the physiologically relevant target of RA190. Dickson et al. used proteome-wide and targeted analysis of a cytotoxic molecule, RA190. Despite previous reports of RA190’s selectivity for proteasomal ubiquitin receptor Rpn13, the group finds no evidence for cellular engagement. Instead, a number of proteins were found to be liganded by RA190, suggesting that polypharmacology drives its anti-cancer activity.
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影响因子:
50.3
作者:
Anchoori RK;Karanam B;Peng S;Wang JW;Jiang R;Tanno T;Orlowski RZ;Matsui W;Zhao M;Rudek MA;Hung CF;Chen X;Walters KJ;Roden RB
通讯作者:
Roden RB
影响因子:
16.6
作者:
Lu X;Nowicka U;Sridharan V;Liu F;Randles L;Hymel D;Dyba M;Tarasov SG;Tarasova NI;Zhao XZ;Hamazaki J;Murata S;Burke TR Jr;Walters KJ
通讯作者:
Walters KJ
影响因子:
3.7
作者:
Fejzo, Marlena S.;Anderson, Lee;Slamon, Dennis J.
通讯作者:
Slamon, Dennis J.
影响因子:
3.7
作者:
Fejzo, Marlena S.;Dering, Judy;Slamon, Dennis J.
通讯作者:
Slamon, Dennis J.
影响因子:
3.7
作者:
Fejzo, Marlena S.;Ginther, Chuck;Slamon, Dennis J.
通讯作者:
Slamon, Dennis J.