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Remodeling KRAS

Daniel J Deredge1, Patrick L Wintrode1

  • 1Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 North Pine St., Baltimore, MD 21201, USA.

Structure (London, England : 1993)
|September 7, 2017
PubMed

Insights

Targeting cancer-driving RAS proteins is challenging. This study uses hydrogen-deuterium exchange mass spectrometry (HDX-MS) to analyze compounds affecting an oncogenic KRAS mutant, aiding drug development.

Area of Science:

  • Oncogenic signaling pathways
  • Protein structure and dynamics
  • Drug discovery and development

Background:

  • Mutations in RAS family small GTPases are implicated in various human cancers.
  • RAS proteins are historically difficult to target therapeutically due to their structure and function.
  • Oncogenic KRAS mutations drive tumor growth and represent a significant unmet medical need.

Purpose of the Study:

  • To investigate the structural and dynamic effects of two distinct chemical compounds on an oncogenic KRAS mutant.
  • To evaluate the utility of Hydrogen-Deuterium Exchange Mass Spectrometry (HDX-MS) as a tool for characterizing drug interactions with RAS proteins.
  • To provide insights into potential strategies for targeting KRAS-driven cancers.

Main Methods:

  • Utilized Hydrogen-Deuterium Exchange Mass Spectrometry (HDX-MS) to monitor protein structural dynamics.
  • Analyzed the interaction of two small molecules with different chemical scaffolds against a specific oncogenic KRAS mutant.
  • Characterized changes in protein structure and dynamics upon compound binding.

Main Results:

  • Observed distinct effects of the two compounds on the structure and dynamics of the oncogenic KRAS mutant.
  • HDX-MS successfully captured compound-induced conformational changes in KRAS.
  • The study identified specific regions of KRAS affected by the tested compounds.

Conclusions:

  • HDX-MS is a valuable technique for studying the effects of small molecules on RAS protein structure and dynamics.
  • Understanding these interactions is crucial for developing effective therapies against KRAS-mutated cancers.
  • The findings support the continued development of novel KRAS-targeting drugs.

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