Functional Metagenomics Approach for the Discovery of Novel Genes Encoding Phosphatase Activity

Abstract

Phosphate release from inorganic and organic phosphorus compounds can be enzymatically mediated. Phosphate-releasing enzymes, comprising acid and alkaline phosphatases, are recognized as useful biocatalysts in applications such as plant and animal nutrition, bioremediation, and diagnostic analysis. Here, we describe a functional metagenomics approach enabling rapid identification of genes encoding these enzymes. The target genes are detected based on small- and large-insert metagenomic libraries derived from diverse environments. This approach has the potential to unveil entirely new phosphatase families or subfamilies and members of known enzyme classes that hydrolyze phosphomonoester bonds such as phytases. Additionally, we provide a strategy for efficient heterologous expression of phosphatase genes.

Keywords: Function-based screening; Metagenomic libraries; Phosphatases; Phosphorus; Phytases.