ArticleProtein science : a publication of the Protein Society2021
Rheostat functional outcomes occur when substitutions are introduced at nonconserved positions that diverge with speciation.
Article in Protein science : a publication of the Protein Society, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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Who cites it
18 citing papers in PubMed, 25 citations in OpenAlex.
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- Dissecting the effects of single amino acid substitutions in SARS-CoV-2 Mpro.Protein science : a publication of the Protein Society · 2025Article
- Identification of positions in human aldolase a that are neutral for apparent KArchives of biochemistry and biophysics · 2024Article
- Dynamics-based protein network features accurately discriminate neutral and rheostat positions.Biophysical journal · 2024Article
- Rheostatic contributions to protein stability can obscure a position's functional role.Protein science : a publication of the Protein Society · 2024Article
- Rheostats, toggles, and neutrals, Oh my! A new framework for understanding how amino acid changes modulate protein function.The Journal of biological chemistry · 2024Review
- The intrinsically disordered transcriptional activation domain of CIITA is functionally tuneable by single substitutions: An exception or a new paradigm?Protein science : a publication of the Protein Society · 2024Article
- Fructose-1-kinase has pleiotropic roles inbioRxiv : the preprint server for biology · 2023Article
- The 2.4 Å structure of Zymomonas mobilis pyruvate kinase: Implications for stability and regulation.Archives of biochemistry and biophysics · 2023Article
- PYK-SubstitutionOME: an integrated database containing allosteric coupling, ligand affinity and mutational, structural, pathological, bioinformatic and computational information about pyruvate kinase isozymes.Database : the journal of biological databases and curation · 2023Article
- Odd one out? Functional tuning of Zymomonas mobilis pyruvate kinase is narrower than its allosteric, human counterpart.Protein science : a publication of the Protein Society · 2022Article
- Discovering interrelated natural mutations of efflux pump KmrA from Klebsiella pneumoniae that confer increased multidrug resistance.Protein science : a publication of the Protein Society · 2022Article
- Structural Plasticity Is a Feature of Rheostat Positions in the Human NaInternational journal of molecular sciences · 2022Article
- Bioprospecting of microbial enzymes: current trends in industry and healthcare.Applied microbiology and biotechnology · 2022Review
- Substitutions at a rheostat position in human aldolase A cause a shift in the conformational population.Protein science : a publication of the Protein Society · 2022Article
- Rheostat functional outcomes occur when substitutions are introduced at nonconserved positions that diverge with speciation.Protein science : a publication of the Protein Society · 2021Article
- Substitutions at rheostat position 52 of LacI have long-range effects on the LacI conformational landscape.Biophysical chemistryArticle
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Authors and funding
11 authors at 2 institutions in 1 country.
Funding
Abstract
When amino acids vary during evolution, the outcome can be functionally neutral or biologically-important. We previously found that substituting a subset of nonconserved positions, "rheostat" positions, can have surprising effects on protein function. Since changes at rheostat positions can facilitate functional evolution or cause disease, more examples are needed to understand their unique biophysical characteristics. Here, we explored whether "phylogenetic" patterns of change in multiple sequence alignments (such as positions with subfamily specific conservation) predict the locations of functional rheostat positions. To that end, we experimentally tested eight phylogenetic positions in human liver pyruvate kinase (hLPYK), using 10-15 substitutions per position and biochemical assays that yielded five functional parameters. Five positions were strongly rheostatic and three were non-neutral. To test the corollary that positions with low phylogenetic scores were not rheostat positions, we combined these phylogenetic positions with previously-identified hLPYK rheostat, "toggle" (most substitution abolished function), and "neutral" (all substitutions were like wild-type) positions. Despite representing 428 variants, this set of 33 positions was poorly statistically powered. Thus, we turned to the in vivo phenotypic dataset for E. coli lactose repressor protein (LacI), which comprised 12-13 substitutions at 329 positions and could be used to identify rheostat, toggle, and neutral positions. Combined hLPYK and LacI results show that positions with strong phylogenetic patterns of change are more likely to exhibit rheostat substitution outcomes than neutral or toggle outcomes. Furthermore, phylogenetic patterns were more successful at identifying rheostat positions than were co-evolutionary or eigenvector centrality measures of evolutionary change.
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