04-01-2018 дата публикации
Номер: US20180002680A1
Принадлежит:
The present invention relates to variant phytase enzymes and their use thereof. 1. A composition comprising a variant phytase enzyme comprising at least one amino acid substitutions as compared to SEQ ID NO:1 , wherein said amino acid substitution is at a position number selected from the group consisting of 255 , 159 , 354 , 1 , 30 , 36 , 39 , 55 , 60 , 65 , 69 , 73 , 74 , 79 , 85 , 101 , 109 , 111 , 116 , 118 , 120 , 137 , 138 , 139 , 141 , 146 , 157 , 176 , 180 , 183 , 184 , 185 , 186 , 189 , 233 , 245 , 276 , 282 , 288 , 291 , 295 , 297 , 311 , 315 , 341 , 363 , 369 , 370 , 380 , 383 , 385 and 402.2. A composition comprising a variant phytase enzyme comprising at least one amino acid substitutions as compared to SEQ ID NO:1 , wherein said amino acid substitution is at a position number selected from the group consisting of 255 , 159 , 354 , 1 , 30 , 36 , 39 , 55 , 60 , 65 , 69 , 73 , 74 , 79 , 85 , 101 , 109 , 111 , 116 , 118 , 120 , 137 , 138 , 139 , 141 , 146 , 157 , 176 , 180 , 183 , 184 , 185 , 186 , 189 , 233 , 245 , 276 , 282 , 288 , 291 , 295 , 297 , 311 , 315 , 341 , 363 , 369 , 370 , 380 , 383 , 385 and 402 , wherein said variant phytase enzyme has at least at least 1.1 fold better activity as compared to SEQ ID NO:1 under a condition selected from the group consisting of thermostability at 58° C. , thermostability at 66° C. , pH stability at pH 4.5 and pH stability at pH 5.5.3. A composition according to wherein said variant phytase enzyme is at least 95% identical to SEQ ID NO:1.4. A composition according to wherein said amino acid substitutions are selected from the group consisting of Y255D claim 1 , R159Y claim 1 , F354Y claim 1 , Q1S claim 1 , Q1V claim 1 , Q1N claim 1 , Q30K claim 1 , A36K claim 1 , T39D claim 1 , I55V claim 1 , H60S claim 1 , H60Q claim 1 , R65H claim 1 , D69N claim 1 , A73D claim 1 , A73E claim 1 , K74D claim 1 , K74P claim 1 , K74L claim 1 , Q79L claim 1 , Q79R claim 1 , Q79A claim 1 , Q79G claim 1 , Q79F claim 1 , I85V claim ...
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