inStem (Institute for Stem Cell Science and Regenerative Medicine)

Department of Biotechnology
Department of Biotechnology
inStem (Institute for Stem Cell Science and Regenerative Medicine)

Evolutionary Analysis of Trehalose Breakdown Pathways.

Publication Type

Journal Article

Date of Publication

June 2, 2026

Journal

Genome biology and evolution

Volume/Issue

18/6

ISSN

1759-6653

Trehalose is a widely prevalent disaccharide that acts as a cellular stress protectant and functions as an energy source that enters central carbon metabolism when broken down. The evolution and distribution of trehalose breakdown pathways across kingdoms of life is not well studied, and therefore the ability of different organisms to consume trehalose as a carbon source is unknown. In this study, we build a comprehensive evolutionary analysis of the four known trehalose breakdown pathways-trehalase (acid, neutral, glycosyl hydrolase 15), trehalose phosphorylases (TP, treP), and trehalose specific phosphotransferases (PTS), by studying their distributions across ∼3,800 prokaryotic and eukaryotic genomes. Our study suggests the presence of trehalase in the last eukaryotic common ancestor, and reveals near-universal presence of trehalase in eukaryotes, except in all birds where trehalase was lost in the first bird ancestor. Fungi alone retain additional TPs in addition to trehalase. In contrast, while trehalose breakdown in prokaryotes is highly sporadic, it can occur via multiple, independently evolved pathways, including trehalase, the trehalose-specific PTS and TP. Finally, we observe that a subset of fast-growing Gammaproteobacteria retain the trehalose specific PTS, the loss of which reduces growth in Escherichia coli. Overall, our findings uncover the evolutionary landscape of trehalose breakdown, and use of this versatile disaccharide as an energy reserve in different kingdoms of life.

Alternate Journal

Genome Biol Evol

PubMed ID

42175661

PubMed Central ID

PMC13237430

Authors

Muthu G G
Laxman S
Seshasayee ASN