Dongguan Apac Biotechnology Co., Ltd.

Tsung-Yu Ko

Cheng-Yen Lin

Hui-Lin Lai

Ya-Shan Cheng

Tzu-Hui Wu

Jian-Wen Huang

Rey-Ting Guo

Chun-Chi Chen

A phytase having improved thermostability is disclosed. The phytase has a modified amino acid sequence of SEQ ID NO: 2, wherein the modification is one of mutations A to D. The mutation A is to substitute amino acids at positions 143 and 262 with cysteine, the mutation B is to substitute amino acids at positions 259 and 312 with cysteine, the mutation C is to substitute amino acids at positions 205 and 257 with cysteine, and the mutation D is to substitute amino acids at positions 264 and 309 with cysteine.

Phytase having improved thermostability

A cellulase having improved thermostability is disclosed. The cellulase comprises a modified amino acid sequence of SEQ ID NO: 2, wherein the modification is adding a cysteine in N terminal and adding a glycine and a cysteine or adding a proline and a cysteine in C terminal.

Cellulase having improved thermostability

A cellulase having improved enzymatic activity is disclosed. The cellulase comprises a modified amino acid sequence of SEQ ID NO: 2, wherein the modification is a substitution of Tyrosine at position 161 with Histidine.

Cellulase having improved enzymatic activity

A pectinase having improved thermostability is disclosed. The pectinase has a modified amino acid sequence of SEQ ID NO: 2, wherein the modification is a substitution of serine at position 181 with phenylalanine, methionine or leucine.

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Taipei, Taiwan

Tsung-Yu Ko