Design and Evaluation of Hydroxamate Derivatives as Metal-Mediated Inhibitors of a Protein Tyrosine Kinase
摘要:
Protein tyrosine kinases use two Mg2+ ions as cofactors in catalysis, one as the ATP-Mg complex (M1) and the other as an essential activator (M2). The M2-binding site has high affinity for transition metal cations such as cobalt and zinc. Taking advantage of this high affinity, we examined hydroxamates as metal-mediated inhibitors against C-terminal Src kinase (Csk), a protein tyrosine kinase. Of a small group of amino acid hydroxamates, tyrosine and phenylalanine hydroxamates inhibited Csk activity only in the presence of Co2+. Four classes of phenylalanine and tyrosine hydroxamate derivatives were synthesized and evaluated as metal-mediated inhibitors of Csk, leading to improved inhibition and a better understanding of the structure-activity relationships. This study suggests that hydroxamates may serve as a general scaffold for developing metal-mediated inhibitors against protein tyrosine kinases. To the best of our knowledge, this is the first report of designing metal-mediated inhibitors against a protein tyrosine kinase by targeting a metal binding site.
Selective Substrates and Activity-Based Probes for Imaging of the Human Constitutive 20S Proteasome in Cells and Blood Samples
作者:Wioletta Rut、Marcin Poręba、Paulina Kasperkiewicz、Scott J. Snipas、Marcin Drąg
DOI:10.1021/acs.jmedchem.8b00026
日期:2018.6.28
the HyCoSuL approach, we designed and synthesized novel and selective fluorogenic substrates for each of these three constitutive 20S proteasome activities and applied them to assess inhibition of proteasome subunits by MG-132 and a clinically used inhibitor bortezomib. Our results confirm the utility of designed substrates in biochemical assays. Furthermore, selective peptide sequences obtained in this
Development of Low Molecular Weight HIV-1 Protease Dimerization Inhibitors
作者:You Seok Hwang、Jean Chmielewski
DOI:10.1021/jm049581j
日期:2005.3.1
The role of HIV protease in viral replication has made it a significant target for inhibition. The focus of our studies is to target the dimerization interface of HIV-1 protease because disruption of the dimer will inhibit enzymatic activity. The initial strategy began with cross-linked peptides derived from the interface of HIV protease. Herein we describe the design of a focused library of agents
Novel indole peptidomimetics as thrombin receptor antagonists
申请人:——
公开号:US20030224999A1
公开(公告)日:2003-12-04
The invention is directed to novel indole peptidomimetic compounds which are useful as thrombin receptor antagonists for the treatment of diseases associated with thrombosis, restenosis, hypertension, heart failure, arrhythmia, inflammation, angina, stroke, atherosclerosis, ischemic conditions, Angiogenesis related disorders, cancer, and neurodegenerative disorders. Pharmaceutical compositions comprising the substituted indole peptidomimetics of the present invention and methods of treating conditions mediated by the thrombin receptor are also disclosed.
Inhibition of Ras Signaling by Blocking Ras-Effector Interactions with Cyclic Peptides
作者:Punit Upadhyaya、Ziqing Qian、Nicholas G. Selner、Sarah R. Clippinger、Zhengrong Wu、Roger Briesewitz、Dehua Pei
DOI:10.1002/anie.201502763
日期:2015.6.22
cell‐penetrating properties. These cell‐permeable cyclicpeptides inhibit Rassignaling by binding to Ras‐GTP and blocking its interaction with downstream proteins and they induce apoptosis of cancer cells. Our results demonstrate the feasibility of developing cyclicpeptides for the inhibition of intracellular protein–protein interactions and of direct Ras inhibitors as a novel class of anticancer agents
Disclosed are MC-3/MC-4 receptor ligands, the ligands having the following formula:
1
wherein A is a conformationally restricted ring system selected from the group consisting of:
a) non-aromatic carbocyclic rings;
b) aromatic carbocyclic rings;
c) non-aromatic heterocyclic rings;
d) aromatic heterocyclic rings;
wherein said rings comprises from 5 to 8 atoms; and W is a unit which preferable comprises D-1-fluorophenyalanine, Y comprises a heteroatom, and Z comprises an aromatic carbocyclic ring. Also disclosed are pharmaceutical compositions comprising the ligands of the invention as well as methods of treating diseases mediated through MC-3/MC-4 receptors.