欧盟评估一种木聚糖酶的安全性

　　食品伙伴网讯  2019年11月20日，欧盟食品安全局（EFSA）就食品酶木聚糖酶（1,4‐β‐d‐xylan xylanohydrolase）的安全性发表科学意见。

 

　　据了解，这种食品酶是Advanced Enzyme Technologies Ltd.使用非转基因短小芽孢杆菌（Bacillus pumilus） BLXSC菌株生产的，旨在用于烘焙过程、用于生产淀粉和谷蛋白级分的谷物处理及蒸馏酒精生产中。经过评估，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 1,4‐β‐d‐xylan xylanohydrolase （EC 3.2.1.8） is produced with the non‐genetically modified strain Bacillus pumilus （strain BLXSC） by Advanced Enzyme Technologies Ltd. The food enzyme is intended to be used in baking processes, grain treatment for the production of starch and gluten fractions, and distilled alcohol production. Since residual amounts of the food enzyme are removed by distillation and during grain treatment, dietary exposure was only calculated for baking processes. based on the maximum recommended use levels for baking processes, and individual data from the EFSA Comprehensive European Food Database, dietary exposure to the food enzyme-Total Organic Solids （TOS） was estimated to be up to 0.138 mg TOS/kg body weight （bw） per day. As the production strain of B. pumilus meets the requirements for a Qualified Presumption of Safety （QPS） approach, no toxicological data are required. Similarity of the amino acid sequence to those of known allergens was searched and no match was found. The Panel considered that under the intended conditions of use （other than distilled alcohol production）， the risk of allergic sensitisation and elicitation reactions by dietary exposure cannot be excluded, but is considered to be low. based on the QPS status of the production strain and 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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