Phytases and uses thereof

1. A composition comprising a variant phytase enzyme comprising amino acid substitutions of Y255D and F354Y and at least one further amino acid substitution as compared to SEQ ID NO:1, wherein said further amino acid substitution is selected from the group consisting of Q1S, Q1V, Q1N, Q30K, A36K, T39D, I55V, H60S, H60Q, R65H, D69N, A73D, A73E, K74D, K74P, K74L, Q79L, Q79R, Q79A, Q79G, Q79F, I85V, A101L, A109D, A109E, A109G, A109F, A109P, T111S, T111D, T111Q, A116Y, A116P, A116R, A116S, T118R, T118S, S120R, N137S, N137P, A138V, A138H, A138D, A138P, N139P, N139A, N139H, T141E, T141G, T141A, T141R, S146R, G157Q, G157N, G157L, G157R, G157A, N176K, N180T, N180E, K183R, Q1845, D185N, D185L, E186V, E186A, S189T, G233A, T245E, M276V, H282N, H282P, A288E, A288R, A288V, V291I, T295I, V297L, G311S, E315G, E315S, L341Y, L341V, K363A, K363L, N369P, T370P, A380R, A380T, E383S, R385S, R385V, R385T, E402R, E402T, E402D, E402P and E402N; and wherein said variant phytase enzyme has at least 90% sequence identity to SEQ ID NO: 1 and has phytase activity.

2. The composition according to claim 1 wherein said variant phytase comprises the amino acid substitutions I55V/G157Q/R159Y/Y255D/F354Y/A380P and has at least 95% sequence identity to SEQ ID NO:5, and wherein said variant phytase has phytase activity.

3. The composition according to claim 1 wherein said variant phytase comprises the amino acid substitutions I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60Q/D69N/K74D/S120R/N137P and has at least 95% sequence identity to SEQ ID NO:7, and wherein said variant phytase has phytase activity.

4. The composition according to claim 1 wherein said variant phytase comprises the amino acid substitutions I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60Q/D69N/K74D/S120R/N137P/N139A/N176K/D185N/E402D and has at least 95% sequence identity to SEQ ID NO:9, and wherein said variant phytase has phytase activity.

5. A composition according to claim 1 wherein said variant phytase enzyme has an amino acid substitution set selected from the group consisting of I55V/Y255D/G311S/F354Y, I55V/I85V/Y255D/V291I/F354Y, I55V/I85V/S189T/G233A/Y255D/F354Y/A380P, I55V/G157Q/Y255D/V291I/V297L/F354Y, I55V/G157Q/R159Y/Y255D/F354Y/A380P, I55V/I85V/G157Q/G233A/Y255D/V297L/F354Y, I55V/A101L/G157Q/Y255D/F354Y, I55V/I85V/A101L/R159Y/S189T/Y255D/F354Y, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60S/D69N/T111D/N137P, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/N1375/T141A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60Q/D69N/N137P/A138V, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/D69N/K74D/N137P/A138V/T141E, I55V/G157Q/R159Y/Y255D/F354Y/A380P/K74D/T111D/T141A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/N1375/A138V/T141E, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60Q/K74P/N137S/T141E, I55V/G157Q/R159Y/Y255D/F354Y/A380P/D69N/K74P, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60Q/K74P, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/T111D/S120R, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/H60Q/K74D/T111D/S120R, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/D69N, I55V/G157Q/R159Y/Y255D/F354Y/A380P/D69N/K74D, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/H60Q/D69N/N137S/A138V, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/K74D/Q157A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/H60Q/K74D/N137P/T141A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/K74D, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/D69N/N137P/T141E/Q157A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/S120R/N137P/A138V, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/H60Q, I55V/G157Q/R159Y/Y255D/F354Y/A380P/K74D/T141A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/K74P, I55V/G157Q/R159Y/Y255D/F354Y/A380P/N137P/A138V, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60Q/D69N, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/D69N/K74D, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60Q/D69N/K74D/S120R/N137P, I55V/G157Q/R159Y/Y255D/F354Y/A380P/D69N/N137P/A138V/T141E, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/D69N/K74P/T111D/S120R/T141A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/N137P/T141A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/N137P/A138V/T141E, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/K74D, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/H60S/T111D/S120R, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/H60S/D69N/S120R/N137S/T141A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60Q/N137P/A138V/T141A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/Q157L, I55V/G157Q/R159Y/Y255D/F354Y/A380P/S120R/N137P, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60Q, I55V/G157Q/R159Y/Y255D/F354Y/A380P/S120R, I55V/G157Q/R159Y/Y255D/F354Y/A380P/S120R/N137S/A138V/Q157L, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60S/K74Y/S120R/A138V, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/D69N/S120R/T141A, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60S, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/S120R, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60 S/K74D, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/T111D, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/H60S, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/K74D/T141E, I55V/G157Q/R159Y/Y255D/F354Y/A380P/K74D/T111D/T141E/Q157N, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60S/K74D/T111D/S120R/T141E/Q157N, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T39D/K74D/S120R/T141E, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T141E, I55V/G157Q/R159Y/Y255D/F354Y/A380P/K74D/S120R/Q157N, I55V/G157Q/R159Y/Y255D/F354Y/A380P/K74D/S120R, I55V/G157Q/R159Y/Y255D/F354Y/A380P/T111D/S120R/T141E, I55V/G157Q/R159Y/Y255D/F354Y/A380P/H60S/R65H, I55V/H60Q/D69N/K74D/S120R/N137P/G157Q/R159Y/Y255D/F354Y/A380P/N139A/N176K/D185N/E402D, I55V/H60Q/D69N/K74D/S120R/N137P/G157Q/R159Y/Y255D/F354Y/A380P/N176K/D185N/H282N/R385T, I55V/H60Q/D69N/K74D/S120R/N137P/G157Q/R159Y/Y255D/F354Y/A380P/N176K/D185N/K363A/R385T/E402T, I55V/H60Q/D69N/K74D/S120R/N137P/G157Q/R159Y/Y255D/F354Y/A380P/N139H/N176K/D185N/H282N/A288R/E315G/R385T, I55V/H60Q/D69N/K74D/S120R/N137P/G157Q/R159Y/Y255D/F354Y/A380P/N139A/N176K/A288R/E315G, and I55V/H60Q/D69N/K74D/S120R/N137P/G157Q/R159Y/Y255D/F354Y/A380P/D185N/H282N/A288R/E315G.

6. The composition according to claim 1 further comprising animal feed.