Cited by 131Heat shock proteins researchEvolution and Genetic DynamicsGenetic Mapping and Diversity in Plants and Animals

HSP90-buffered genetic variation is common in Arabidopsis thaliana

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Sangster, Todd A., Salathia, Neeraj, Lee, Hana N., Watanabe, Etsuko, Schellenberg, Kurt, Morneau, Keith, Wang, Hui, Undurraga, Soledad +2 more·2008·Proceedings of the National Academy of Sciences

Abstract

HSP90 is a protein chaperone particularly important in the maturation of a diverse set of proteins that regulate key steps in a multitude of biological processes. Alterations in HSP90 function produce altered phenotypes at low penetrance in natural populations. Previous work has shown that at least some of these phenotypes are due to genetic variation that remains phenotypically cryptic until it is revealed by the impairment of HSP90 function. Exposure of such “buffered” genetic polymorphisms can also be accomplished by environmental stress, linking the appearance of new phenotypes to defects in protein homeostasis. Should such polymorphisms be widespread, natural selection may be more effective at producing phenotypic change in suboptimal environments. In evaluating this hypothesis, a key unknown factor is the frequency with which HSP90-buffered polymorphisms occur in natural populations. Here, we present Arabidopsis thaliana populations suitable for genetic mapping that have constitutively reduced HSP90 levels. We employ quantitative genetic techniques to examine the HSP90-dependent polymorphisms affecting a host of plastic plant life-history traits. Our results demonstrate that HSP90-dependent natural variation is present at high frequencies in A. thaliana , with an expectation that at least one HSP90-dependent polymorphism will affect nearly every quantitative trait in progeny of two different wild lines. Hence, HSP90 is likely to occupy a central position in the translation of genotypic variation into phenotypic differences.

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Crossref · 10.1073/pnas.0712210105

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  • Hsp90's role as a capacitor for variation has been observed in diverse eukaryotes including flies, plants, and fungi.

    “This role as a capacitor for variation has been observed in diverse eukaryotes including flies, plants, and fungi18,19,129-134.”
  • Hsp90 can buffer the effects of genetic or epigenetic variation, keeping it silent until released when the chaperone reservoir is compromised in response to stress.

    “First, Hsp90 can buffer the effects of genetic or epigenetic variation, keeping it silent until released when the chaperone reservoir is compromised in response to stress.”

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Authors
Sangster, T. A., Salathia, N., Lee, H. N., Watanabe, E., Schellenberg, K., Morneau, K., Wang, H., Undurraga, S., Queitsch, C., & Lindquist, S.
Affiliations
  • Howard Hughes Medical Institute (US)
  • Harvard University (US)
Venue
Proceedings of the National Academy of Sciences
Published
2008-02-26
Volume
105
Issue
8
Pages
2969-2974
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2087206561
Cited by
131
References
32
Citations by year
2025: 5 · 2024: 4 · 2023: 7 · 2022: 3 · 2021: 3 · 2020: 2 · 2019: 11 · 2018: 12 · 2017: 5 · 2016: 7 · 2015: 10 · 2014: 11 · 2013: 10 · 2012: 10
FWCI
4.25
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • G. Harold and Leila Y. Mathers Foundation
  • National Institute of General Medical Sciences (P50GM068763, GM-068763)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
Keywords
HSP90, molecular chaperones, cryptic genetic variation, Arabidopsis thaliana, life-history traits, phenotypic plasticity, proteostasis, natural selection, genotype-phenotype correlation
MeSH terms
Chromosome Mapping, Biological Evolution, Phenotype, Genetic Variation, Arabidopsis, HSP90 Heat-Shock Proteins, Quantitative Trait Loci

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