Research Institute of Functional Food, Anhui Normal University, Wuhu, 241000, Anhui Province, People's Republic of China.
College of Environmental Science and Engineering, Anhui Normal University, Wuhu, 241000, Anhui Province, People's Republic of China.
Appl Microbiol Biotechnol. 2017 Oct;101(20):7477-7486. doi: 10.1007/s00253-017-8500-5. Epub 2017 Sep 13.
Difructose anhydride IV (DFA IV) is a cyclic disaccharide consisting of two fructose residues, which is obtained from levan conversion with levan fructotransferase (LFTase) and rarely found in nature as a low-calorie sugar substitute. Some beneficial effects of DFA IV connected with its consumption have been described. The article reviews the properties and physiological functions of DFA IV, levan conversion, resources and properties of LFTase and the produced methods of DFA IV. LFTase as a relatively novel enzyme and its molecular evolution are discussed as well. The aim is to better understand a novel sugar-substituting sweetener of DFA IV as a food additive.
二果糖酐 IV（DFA IV）是一种由两个果糖残基组成的环状二糖，通过莱菔糖转化酶（LFTase）从莱菔糖转化而来，在自然界中很少作为低热量的糖替代品存在。DFA IV 的一些有益作用与其消耗有关。本文综述了 DFA IV 的性质和生理功能、莱菔糖转化、LFTase 的资源和性质以及 DFA IV 的生产方法。还讨论了相对较新的酶 LFTase 及其分子进化。目的是更好地了解 DFA IV 作为食品添加剂的新型代糖。
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