Molecular assemblies of the catalytic domain of SOS with KRas and oncogenic mutants
Open accessAbstract
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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KRAS (G13D) enhances nucleotide exchange.
“For example, KRAS (G13D) enhances nucleotide exchange.”
From Targeting KRAS mutant cancers: from druggable therapy to drug resistance (2022) · cites this paper as [154]
These rapid exchange mutations may deplete the activity of GEF, thereby desensitizing cancer cells to GEF inhibition.
“However, these rapid exchange mutations may deplete the activity of GEF, thereby desensitizing cancer cells to GEF inhibition [152–154].”
From Targeting KRAS mutant cancers: from druggable therapy to drug resistance (2022) · cites this paper as [154]
Rapid exchange mutants can synergize with GEF to produce extremely high levels of nucleotide exchange.
“Rapid exchange mutants can synergize with GEF to produce extremely high levels of nucleotide exchange.”
From Targeting KRAS mutant cancers: from druggable therapy to drug resistance (2022) · cites this paper as [154]
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Targeting KRAS mutant cancers: from druggable therapy to drug resistance
Zhu, C., Guan, X., Zhang, X., Luan, X., Song, Z., Cheng, X., Zhang, W., & Qin, J.-J. (2022) · Molecular Cancer · doi:10.1186/s12943-022-01629-2 · Cited by 231 · see citing works
- 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
- Publisher
- National Academy of Sciences
- Published
- 2021-03-15
- Volume
- 118
- Issue
- 12
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- PMC
- PMC8000204
- 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
- bronze
- doi.org
- 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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