ArticleFEMS microbiology letters2024
Discovery of a glyphosate oxidase in nature.
Article in FEMS microbiology letters, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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5 authors.
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Abstract
Glyphosate is the most used herbicide on Earth. After a half-century of use we know only two biodegradative pathways, each of which appears to degrade glyphosate incidentally. One pathway begins with oxidation of glyphosate catalysed by glycine oxidase (GO). To date, no naturally occurring GO enzymes preferentially oxidize glyphosate but nonetheless are sufficiently active to initiate its degradation. However, GO enzymes that preferentially oxidize glyphosate over glycine-i.e. glyphosate oxidases (GOXs)-may have evolved in environments facing prolonged glyphosate exposure. To test this hypothesis, we screened a metagenomic library from glyphosate-exposed agricultural soil and identified a GOX from clone 11AW19 (GO19) that prefers glyphosate over glycine by four orders of magnitude. This is the first GO isolated from a natural source exhibiting a glyphosate preference. Not only have we discovered the first GOX in nature, but we have also demonstrated the utility of functional metagenomics to find a GOX with greater catalytic efficiency and specificity than those engineered using directed evolution.
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