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Residence time and kinetic efficiency analysis of extracellular signal-regulated kinase 2 inhibitors

Darin Vanderpool1, Charles E Grimshaw1, J David Lawson2

  • 1Enzymology and Biophysical Chemistry Group, Takeda California, San Diego, CA 92121, USA.

Analytical Biochemistry
|December 24, 2014
PubMed

Insights

This study introduces a new assay to rapidly measure the off-rate (k(off)) and residence time of ERK inhibitors, aiding drug discovery for cancer and inflammation by providing key kinetic data.

Area of Science:

  • Biochemistry and Molecular Biology
  • Pharmacology and Drug Discovery
  • Cell Signaling and Cancer Research

Background:

  • The RAS/RAF/MEK/ERK pathway regulates crucial cellular functions like proliferation, migration, and differentiation.
  • Aberrant signaling in this pathway is implicated in cancer and inflammatory diseases.
  • Targeting enzymes within this pathway is a key strategy in drug development.

Purpose of the Study:

  • To develop a medium-throughput assay for rapid kinetic analysis of ERK inhibitors.
  • To determine the k(off) constant, residence time, and kinetic efficiency of inhibitors.
  • To provide enhanced data for selecting optimal lead compounds in early drug discovery.

Main Methods:

  • Development of a fluorescent probe displacement assay for medium-throughput screening.
  • Rapid determination of the dissociation rate constant (k(off)) for ERK inhibitors.
  • Comparative kinetic analysis of inhibitors using active and inactive forms of ERK2.

Main Results:

  • Successfully established a fluorescent probe displacement assay for kinetic profiling.
  • Identified several ERK inhibitors with determined k(off) values and residence times.
  • Demonstrated the utility of the assay in distinguishing inhibitor kinetics.

Conclusions:

  • The developed assay provides a rapid and efficient method for kinetic characterization of ERK inhibitors.
  • Kinetic parameters like k(off) and residence time are crucial for lead optimization.
  • This approach facilitates informed selection of drug candidates targeting the ERK pathway.
Keywords:
ERK2Kinetic efficiencyOff-rateResidence timeStructure–kinetic relationshipTime-dependent inhibition

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