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The Functions of 4-α-glucanotransferases and their use for the Production of Cyclic Glucans

1999; Taylor & Francis; Volume: 16; Issue: 1 Linguagem: Inglês

10.1080/02648725.1999.10647978

2046-5556

Takeshi Takaha, Steven M. Smith,

Biofuel production and bioconversion

industrial uses (Lillford and Morrison. 1997).There is therefore great interest in trying to improve or modify starch production in plants, and in using enzymes from diverse organisms for starch processing.Of all the enzymes involved in a-I,4-glucan metabolism.one group whose functions are more varied and less well understood than others, are the 4-a-glucanotransferases (1,4-a-D-glucan: I ,4-a-D-glucan.4-a-D-glucanotransferase; here abbreviated to 4aGTase).These enzymes break an a-I,4-link and transfer the resulting glucnn moiety to an acceptor molecule through creation of a new a-I ,4-link.Studies of the functions of these enzymes are particularly important not only for the understanding of their roles in vivo.but also because it has been discovered that they are able to synthesise cyclic glucans in vitro.and therefore have great potential for use in starch processing.