# The identification of functional regions of MEK1 using CRISPR tiling screens

## TL;DR

This paper shows how CRISPR tiling screens can identify important regions of the MEK1 protein for drug discovery and study drug resistance in cancer cells.

## Contribution

The study demonstrates the application of CRISPR tiling screens to identify MEK1 regions critical for cancer cell viability and drug resistance.

## Key findings

- CRISPR tiling screens identified MEK1 regions essential for cancer cell survival.
- Mutations in specific MEK1 regions confer resistance to MEK inhibitors.
- The study highlights the potential and limitations of CRISPR tiling in drug development.

## Abstract

CRISPR tiling screen is a powerful tool to identify protein regions relevant to its biological function. Understanding the functional relevance of the regions of target protein is of great help for structure-based drug discovery. Studying the drug resistance mechanisms of small-molecule inhibitors is important for the development and clinical application of the compounds. Using MEK1 and MEK inhibitors as example here, we demonstrate the utility of CRISPR tiling to identify regions essential for cancer cell viability and regions where mutations are resistant to MEK inhibitors. We study the drug resistance mechanisms of the regions and discussed the potential, as well as limitations, of applying the technology to drug development. Our findings demonstrate the value and prompt the utilization of CRISPR tiling technology in structure-based drug discovery.

Utilization of CRISPR tiling screens to identify protein functional regions for structure-based drug discovery, using MEK1 as a demonstration. Biological mechanism study of distinct MEK1 drug-resistant mutations combined with structural analysis