The evolution of functional complexity within the β-amylase gene family in land plants

BMC Evolutionary Biology
Matthias ThalmannDiana Santelia

Abstract

β-Amylases (BAMs) are a multigene family of glucan hydrolytic enzymes playing a key role not only for plant biology but also for many industrial applications, such as the malting process in the brewing and distilling industries. BAMs have been extensively studied in Arabidopsis thaliana where they show a surprising level of complexity in terms of specialization within the different isoforms as well as regulatory functions played by at least three catalytically inactive members. Despite the importance of BAMs and the fact that multiple BAM proteins are also present in other angiosperms, little is known about their phylogenetic history or functional relationship. Here, we examined 961 β-amylase sequences from 136 different algae and land plant species, including 66 sequenced genomes and many transcriptomes. The extraordinary number and the diversity of organisms examined allowed us to reconstruct the main patterns of β-amylase evolution in land plants. We identified eight distinct clades in angiosperms, which results from extensive gene duplications and sub- or neo-functionalization. We discovered a novel clade of BAM, absent in Arabidopsis, which we called BAM10. BAM10 emerged before the radiation of seed plants and has the feat...Continue Reading

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Citations

Oct 10, 2019·The Plant Journal : for Cell and Molecular Biology·Timothy J BrodribbScott A M McAdam
Aug 28, 2020·Frontiers in Bioengineering and Biotechnology·Andika SidarPeter J Punt
May 20, 2020·Current Opinion in Plant Biology·Melanie R Abt, Samuel C Zeeman
Mar 15, 2021·Applied Biochemistry and Biotechnology·Jai Shankar PaulShailesh Kumar Jadhav
Mar 26, 2021·The Plant Journal : for Cell and Molecular Biology·Tina B SchreierAlison M Smith
Oct 19, 2021·Plant Physiology·Laure C DavidSamuel C Zeeman

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