Immobilized thermostable trehalose synthase and method for producing trehalose and trehalulose by using same

A thermostable trehalose synthase, consisting essentially of:

• an amino acid sequence of a trehalose synthase domain derived from Thermus thermophilus;
• wherein said trehalose synthase domain converts maltose into trehalose and/or converts sucrose into trehalulose;
• and
• an amino acid sequence of a cellulose binding domain;
• wherein said amino acid sequence of said cellulose binding domain has at least 90% sequence identity to SEQ ID NO:
• 2, and wherein said cellulose binding domain binds cellulose;
• wherein said amino acid sequence of said cellulose binding domain is connected to a C-terminal of said amino acid sequence of said trehalose synthase domain through a linker, and said linker consists of consecutive amino acids selected from Threonine and Proline at an N-terminal of SEQ ID NO:
• 2.