16-04-2020 дата публикации
Номер: US20200115691A1
Принадлежит:
NOVOZYMES A/S
The present invention relates to xylanase variants, polynucleotides encoding the variants; nucleic acid constructs, vectors, and host cells comprising the polynucleotides; compositions comprising the xylanase variants and methods of using the variants. 1. A method for obtaining a xylanase variant , comprising(a) introducing into a parent xylanase a substitution at one or more positions corresponding to positions 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18, 19, 31, 32, 33, 34, 39, 43, 44, 45, 46, 48, 50, 58, 59, 61, 62, 64, 65, 67, 68, 79, 82, 88, 90, 94, 101, 102, 104, 110, 112, 113, 116, 119, 120, 123, 126, 127, 128, 129, 131, 135, 143, 145, 146, 159, 160, 165, 168, 176, 179, 181, 188, 191, 194, 195, 196, 197, 205, 209, 212, 217, 218, 221, 224, 231, 235, 237, 238, 242, 269, 280, 282, 295, 298, 299, 300, 302, 305, 306, 307, 311, 312, 313, 322, 323, 324, 333, 334, 335, 336, 337, 338, 339, 340, 342, 343, 344, 345, 346, 347, 349, 350, 354, 357, 359, 360, 363, 364, 366, 367, 368, 371, 373, 374, 376, 377, 378, 380, 385, 388, 390 and 391 of SEQ ID NO: 1, wherein the xylanase variant has xylanase activity and has at least 70%, e.g., at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, or at least 99% sequence identity to SEQ ID NO: 1; and(b) recovering the xylanase variant.2. The method of claim 1 , wherein the xylanase variant has improved thermostability relative to the parent.3. The method of claim 1 , wherein the parent xylanase has at least 70% claim 1 , e.g. claim 1 , at [[at]] least 75% claim 1 , at least 80% claim 1 , at least 85% claim 1 , at least 90% claim 1 , at least 95% claim 1 , at least 96% claim 1 , at least 97% claim 1 , at least 98% claim 1 , at least 99% or 100% sequence identity to SEQ ID NO: 1.4. The method of claim 1 , wherein the one or more substitutions is selected from the group consisting of A2D claim 1 , A2Q claim 1 , A2G claim 1 , A2W claim 1 , A2P claim 1 , A2L claim 1 , A2Y ...
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