protein change in plant evolution: tracing one thread connecting molecular and phenotypic diversity
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2013
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Abstract
Proteins change over the course of evolutionary time. New protein-coding genes and gene families emerge and diversify, ultimately affecting an organism’s phenotype and interactions with its environment. Here we survey the range of structural protein change observed in plants and review the role these changes have had in the evolution of plant form and function. Verified examples tying evolutionary change in protein structure to phenotypic change remain scarce. We will review the existing examples, as well as draw from investigations into domestication, and quantitative trait locus (QTL) cloning studies searching for the molecular underpinnings of natural variation. The evolutionary significance of many cloned QTL has not been assessed, but all the examples identified so far have begun to reveal the extent of protein structural diversity tolerated in natural systems. This molecular (and phenotypic) diversity could come to represent part of natural selection’s source material in the adaptive evolution of novel traits. Protein structure and function can change in many distinct ways, but the changes we identified in studies of natural diversity and protein evolution were predicted to fall primarily into one of six categories: altered active and binding sites; hypomorphic and hypermorphic alleles; altered protein-protein interactions; altered domain content; altered protein stability; and altered activity as an activator or repressor. Variability was also observed in the evolutionary scale at which particular changes were observed. Some changes were detected at both micro- and macroevolutionary timescales, while others were observed primarily at deep or shallow phylogenetic levels. This variation might be used to determine the trajectory of future investigations in structural molecular evolution.
| Reference Key |
ebartlett2013frontiersprotein
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|---|---|
| Authors | ;Madelaine eBartlett;Clinton eWhipple |
| Journal | phytochemistry letters |
| Year | 2013 |
| DOI |
10.3389/fpls.2013.00382
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| URL | |
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