Cited by 77RNA and protein synthesis mechanismsProtein Kinase Regulation and GTPase SignalingCancer Genomics and Diagnostics

Rare codons capacitate Kras-driven de novo tumorigenesis

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Pershing, Nicole L.K., Lampson, Benjamin L., Belsky, Jason A., Kaltenbrun, Erin, MacAlpine, David M., Counter, Christopher M.·2015·Journal of Clinical Investigation

Abstract

The KRAS gene is commonly mutated in human cancers, rendering the encoded small GTPase constitutively active and oncogenic. This gene has the unusual feature of being enriched for rare codons, which limit protein expression. Here, to determine the effect of the rare codon bias of the KRAS gene on de novo tumorigenesis, we introduced synonymous mutations that converted rare codons into common codons in exon 3 of the Kras gene in mice. Compared with control animals, mice with at least 1 copy of this Kras(ex3op) allele had fewer tumors following carcinogen exposure, and this allele was mutated less often, with weaker oncogenic mutations in these tumors. This reduction in tumorigenesis was attributable to higher expression of the Kras(ex3op) allele, which induced growth arrest when oncogenic and exhibited tumor-suppressive activity when not mutated. Together, our data indicate that the inherent rare codon bias of KRAS plays an integral role in tumorigenesis.

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  • Additional biochemical, structural, and signaling distinctions have been identified between different mutant KRAS alleles, including between those at the same amino acid position.

    “Additional biochemical, structural, and signaling distinctions have been identified between different mutant alleles, including between those at the same amino acid position4,8,13–20.”

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Research works printed but not linked: 3

  1. Horio Y, et al. Ki-ras and p53 mutations are early and late events, respectively, in urethane-in- duced pulmonary carcinogenesis in A/J mice. Mol Carcinog. 1996;17(4):217-223.
  2. Collado M, et al. Tumour biology: Senes- cence in premalignant tumours. Nat Cell Biol. 2005;436(7051):642-642.
  3. Kimchi-Sarfaty C, et al. A "silent" polymorphism in the MDR1 gene changes substrate specificity. Science. 2007;315(5811):525-528.

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Authors
Pershing, N. L. K., Lampson, B. L., Belsky, J. A., Kaltenbrun, E., MacAlpine, D. M., & Counter, C. M.
Affiliations
Duke Medical Center (US)
Venue
Journal of Clinical Investigation
Published
2014-12-01
Volume
125
Issue
1
Pages
222-233
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2114694498
Cited by
77
References
53
Citations by year
2026: 2 · 2025: 3 · 2024: 5 · 2023: 7 · 2022: 7 · 2021: 8 · 2020: 9 · 2019: 4 · 2018: 11 · 2017: 8 · 2016: 10 · 2015: 3
FWCI
2.87
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Brigham and Women's Hospital
  • National Cancer Institute (R03CA165927, R01CA154630, P30CA014236)
  • National Institute of General Medical Sciences (T32GM071340)
  • Duke Cancer Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
Keywords
KRAS, rare codons, codon usage bias, synonymous mutations, oncogenic mutations, tumor suppression, carcinogen-induced tumors, protein expression, growth arrest, mouse model
MeSH terms
Adenoma, Animals, Cells, Cultured, Codon, Female, Humans, Lung Neoplasms, Male, Mice, Inbred C57BL, Mice, Transgenic, Urethane, Proto-Oncogene Proteins p21(ras), Tumor Burden, Cell Proliferation, Mice, 129 Strain, Carcinogenesis

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