欧盟评估非转基因茂原链霉菌菌株AE-BTG生产的蛋白质-谷氨酰胺γ-谷氨酰转移酶的安全性

　　

　　据了解，这种食品酶是由非转基因茂原链霉菌菌株AE-BTG生产的，旨在用于9种食品生产过程。

　　

　　经过评估，专家小组认为，在预期的使用条件下，不能排除饮食暴露引起过敏反应的风险。根据所提供的数据，评估小组得出结论，这种食品酶在预期使用条件下不会引起安全问题。部分原文报道如下：

　　

　　The food enzyme protein-glutamine γ-glutamyltransferase (protein-glutamine: amine γ-glutamyltransferase; EC 2.3.2.13) is produced with the non-genetically modified S.mobaraensis strain AE-BTG by AJINOMOTO EUROPE SAS. The food enzyme was free from viable cells of the production organism. It is intended to be used in nine food manufacturing processes. Dietary exposure to the food enzyme–total organic solids (TOS) was estimated to be up to 0.398 mg TOS/kg body weight (bw) per day in European populations. Genotoxicity tests did not indicate a safety concern. The systemic toxicity was assessed by means of a repeated dose 90-day oral toxicity study in rats. The Panel identified a no observed adverse effect level of 538 mg TOS/kg bw per day which when compared with the estimated dietary exposure, resulted in a margin of exposure of at least 1351. A search for homology of the amino acid sequence of the food enzyme to known allergens was made and no match was found. Known sources of food allergens were used in the food enzyme manufacturing process, and the Panel considered that the risk of allergic reactions upon dietary exposure to this food enzyme cannot be excluded. based on the data provided, the Panel concluded that this food enzyme does not give rise to safety concerns under the intended conditions of use.

　　

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