Enzyme having α-1,6-glucosyl transfer activity

The present invention relates to an enzyme having α-1,6-glucosyl transfer activity which can use a partially decomposed starch as a substrate, has heat resistance and is suitable for industrial use, and α-1,6 containing the enzyme as an active ingredient. It is to provide an enzyme agent for producing glucan and a method for producing α-1,6-glucan using the enzyme or the enzyme agent. The present invention provides an enzyme having α-1,6-glucosyl transfer activity, which is a protein of any one of (a) to (c) below. (a) a protein comprising the amino acid sequence set forth in SEQ ID NO: 3; (b) a protein comprising an amino acid sequence having 90% or more amino acid sequence identity to the amino acid sequence set forth in SEQ ID NO: 3; (c) A protein comprising an amino acid sequence in which one or several amino acids are substituted, inserted, deleted and / or added in the amino acid sequence shown in SEQ ID NO: 3. [Selection] Figure 8B