The GtfC enzyme of Exiguobacterium sibiricum 255-15 is an interesting intermediate between α-amylases GH13 and glucansucrase enzymes GH70. The 4,6 glucanotransferase synthesizes a mixture of isomalto/malto-oligosaccharides (IMMOs) and polymers containing 52 % α(1→6) and 35 % α(1→4)-glycosidic linkages using amylose V. The GtfC enzyme produces significantly more oligosaccharide products compared to the GtfB enzyme of L. reuteri 121.

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