Abstract
Background: Phytases are enzymes capable of degrading phytic acid and are used in animal feed supplementation in order to improve digestibility through the release of minerals such as phosphorus. Recent inventions show interest in production and optimization of recombinant phytases with biochemical and physicochemical characteristics promising for animal feed industry.
Methods: This review article is focused on relevant patents of promising phytases, together with the commonly used expression systems for their production and tools currently employed to generate new phytases. We revised all patents related to recombinant phytases and their application in the animal feed industry. The following patents databases were consulted: European Patent Office (Espacenet), the United States Patent and Trademark Office (USPTO), the United States Latin America Patents (LATIPAT), Patent scope -Search International and National Patent Collections (WIPO) and Google Patents.
Results: In this review, information was collected from recent publications, including 38 patents related production systems for different recombinant phytases and their application in the animal feed industry.
Conclusion: We showed that important recombinant phytases were successfully produced in different expression systems. In addition, this work highlights certain biotechnological tools such as mutagenesis for generation of novel enzymes with biochemical properties of use in the animal feed industry.
Keywords: Animal feed industry, expression-systems, heterologous production, phytic acid, phosphorus, phytases, recombinant phytases.
Graphical Abstract
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