Cited by 38Protein Kinase Regulation and GTPase SignalingProtein Tyrosine PhosphatasesMass Spectrometry Techniques and Applications

Molecular assemblies of the catalytic domain of SOS with KRas and oncogenic mutants

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Moghadamchargari, Zahra, Shirzadeh, Mehdi, Liu, Chang, Schrecke, Samantha, Packianathan, Charles, Russell, David H., Zhao, Minglei, Laganowsky, Arthur·2021·Proceedings of the National Academy of Sciences

Abstract

Significance: Disrupting the interaction between Ras and SOS has emerged as an attractive therapeutic strategy. Here, we characterized the assembly of the catalytic domain of SOS (SOS cat ) with oncogenic KRas mutants using native mass spectrometry. By resolving distinct molecular species, we show KRas mutants engage SOS cat differently and the G13D KRas mutant robustly engages SOS cat . A structure of KRas G13D in complex with SOS cat shows repositioning of switch I and II regions within KRas G13D . Moreover, potent small-molecule Ras•SOS disruptors do not dissociate KRas G13D •SOS cat complexes when KRas G13D –GTP is bound at allosteric site of SOS cat . These results underscore the need for more potent Ras•SOS disruptors when considering targeting the disruption of different oncogenic Ras mutants in complex with SOS.

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Crossref · 10.1073/pnas.2022403118

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Authors
Moghadamchargari, Z., Shirzadeh, M., Liu, C., Schrecke, S., Packianathan, C., Russell, D. H., Zhao, M., & Laganowsky, A.
Affiliations
  • Texas A&M University (US)
  • University of Chicago (US)
Corresponding author
Laganowsky, Arthur
Venue
Proceedings of the National Academy of Sciences
Published
2021-03-15
Volume
118
Issue
12
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W3137876780
Cited by
38
References
51
Citations by year
2026: 7 · 2025: 11 · 2024: 6 · 2023: 9 · 2022: 5
FWCI
1.65
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • HHS | NIH | National Cancer Institute (RO1GM121751)
  • HHS | NIH | National Institute of General Medical Sciences (DP2GM123486, P41GM128577)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
  • Physical Sciences › Chemistry › Spectroscopy › Mass Spectrometry Techniques and Applications
Keywords
KRAS G13D, allosteric site, small molecule inhibitors, protein-protein complex structure, native mass spectrometry
MeSH terms
Catalysis, Mutation, Oncogenes, Protein Binding, Mass Spectrometry, Proto-Oncogene Proteins p21(ras), Catalytic Domain, Son of Sevenless Proteins

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