DNA sequences encoding phytases that release inorganic phosphorous from phytic acid of ruminal microorganisms like Selenomonas ruminantium and these are used in animal feed supplements

摘要

Isolated and purified DNA encoding phytases derived from ruminal microorganisms are claimed. Preferred sources of phytases include Selenomonas, Prevotella, Treponema and Megasphaera. A purified and isolated DNA encoding a phytase of Selenomonas ruminantium JY35 (ATCC 55785) is also claimed. Recombinant expression vectors containing DNAs encoding the phytases and host cells transformed with DNAs encoding the phytases are also claimed. The phytases are useful in a wide range of applications involving the dephosphorylation of phytate.