Curr Res Struct Biol
March 2024
Phytase enzymes are a crucial component of the natural phosphorus cycle, as they help make phosphate bioavailable by releasing it from phytate, the primary reservoir of organic phosphorus in grain and soil. Phytases also comprise a significant segment of the agricultural enzyme market, used primarily as an animal feed additive. At least four structurally and mechanistically distinct classes of phytases have evolved in bacteria and eukaryotes, and the natural diversity of each class is explored here using advances in protein structure prediction and functional annotation.
View Article and Find Full Text PDFAppl Environ Microbiol
March 2023
Isoprene monooxygenase (IsoMO, encoded by ) initiates the oxidation of the climate-active gas isoprene, with the genes and nearly always found adjacent to in extant and metagenome-derived isoprene degraders. The roles of and are uncertain, although each is essential to isoprene degradation. We report here the characterization of these proteins from two model isoprene degraders, sp.
View Article and Find Full Text PDFPhylogenetic analysis, homology modelling and biochemical methods have been employed to characterize a phytase from a Gram-negative soil bacterium. Acinetobacter sp. AC1-2 phytase belongs to clade 2 of the histidine (acid) phytases, to the Multiple Inositol Polyphosphate Phosphatase (MINPP) subclass.
View Article and Find Full Text PDFBacteria that inhabit soils and the leaves of trees partially mitigate the release of the abundant volatile organic compound, isoprene (2-methyl-1,3-butadiene). While the initial steps of isoprene metabolism were identified in Rhodococcus sp. AD45 two decades ago, the isoprene metabolic pathway still remains largely undefined.
View Article and Find Full Text PDFHPLC methods are shown to be of predictive value for classification of phytase activity of aggregate microbial communities and pure cultures. Applied in initial screens, they obviate the problems of 'false-positive' detection arising from impurity of substrate and imprecision of methodologies that rely on phytate-specific media. In doing so, they simplify selection of candidates for biotechnological applications.
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