Structure-based design of small molecule and peptide inhibitors for selective targeting of ROCK1: an integrative computational approach

Author(s):  
Samdani Ansar ◽  
Umashankar Vetrivel
2020 ◽  
Author(s):  
Bhairavi Tolani ◽  
Anna Celli ◽  
Yanmin Yao ◽  
Yong Zi Tan ◽  
Richard Fetter ◽  
...  

ABSTRACTMutations in the Ras family of oncogenes are implicated in 33% of human cancers, making Ras an intensely pursued target in drug discovery. As an alternative to direct pharmacological inhibition of Ras, we looked for sensitivities in RAS mutant cells. Using a small molecule screen in cell lines with mutations in Ras and its effector Raf, we discovered 249C as a Ras-mutant selective cytotoxic agent against a spectrum of RAS-mutant cancers. By combining CRISPR chemical-genetic screening, comparative profiling and chemoproteomics, we identified that 249C binds to a unique subunit on vacuolar (V)-ATPase with nanomolar affinity, inhibiting its biochemical activity and, unexpectedly, altering V-ATPase translocation in Ras-induced macropinocytosis. Via binding to V-ATPase, 249C prevents lysosomal acidification and inhibits autophagy and macropinocytosis pathways that several Ras-driven cancers rely on for survival. In characterizing 249C’s mechanism, we show that potency varies with the identity of the RAS driver mutation highlighting a mutant-specific dependence on autophagy and macropinocytosis. Indeed, 249C potently inhibits tumor growth without adverse side effects in a mouse xenograft model of KRAS-driven non-small cell lung cancer. These data establish proof-of-concept for targeting V-ATPase as a way to indirectly target specific Ras mutants, and provide a fundamental link between V-ATPase localization and specific Ras mutant tumor-related activity.


ChemMedChem ◽  
2015 ◽  
Vol 11 (8) ◽  
pp. 802-813 ◽  
Author(s):  
Andrew M. Beekman ◽  
Lesley A. Howell

2021 ◽  
Author(s):  
Ilona Christy Unarta ◽  
Jianchao Xu ◽  
Yuan Shang ◽  
Carina Hey Pui Cheung ◽  
Ruichi Zhu ◽  
...  

Stapled peptides are promising protein-protein interaction (PPI) inhibitors that can increase binding potency. Different from small-molecule inhibitors in which binding mainly depends on energetic interactions with their protein targets, stapled...


Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 1779-P
Author(s):  
MONIQUE HEITMEIER ◽  
RICHARD C. HRESKO ◽  
MALA SHANMUGAM ◽  
PAUL W. HRUZ

2020 ◽  
Vol 20 ◽  
Author(s):  
Xing Lu ◽  
Hong Liang ◽  
Chris Orvig ◽  
Zhen-Feng Chen

: Myeloid cell leukemia 1 (Mcl-1) is a member of the Bcl-2 family of proteins with anti-apoptotic activity. It plays a key role in the regulation of the intrinsic pathway of apoptosis. Moreover, Mcl-1 is correlated with the progression and drug-resistance of various cancers. The development of inhibitors of Mcl-1 may provide effective cancer therapies. Whilst the inhibitors of other Bcl-2 anti-apoptotic proteins have been well explored, the discovery of Mcl-1inhibitors with high selectivity has been challenging. In this review, we summarize the recent literature on small molecule and peptide inhibitors of Mcl-1, which are divided into different types including: peptide inhibitors, gossypol derivatives, marinopyrrole derivatives, S1 derivatives, indole derivatives, quinoline derivatives, S63845, AZD5991, AMG176, etc. Their biological activities are also summarized. Mcl-1 is a valid drug target and inhibition of Mcl-1 with a small molecule inhibitor is a promising strategy for cancer therapy.


2010 ◽  
Vol 2 (9) ◽  
pp. 371-384 ◽  
Author(s):  
Kristen M. Smith ◽  
Alessandro Datti ◽  
Mayumi Fujitani ◽  
Natalie Grinshtein ◽  
Libo Zhang ◽  
...  

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