Safety evaluation of the food enzyme endo‐1,4‐β‐xylanase from a genetically modified Bacillus licheniformis (strain NZYM‐CE)

food enzyme, xylanase, endo-1,4-b-xylanase, 4-b-D-xylan xylanohydrolase, EC 3.2.1.8,Bacillus licheniformis, genetically modified microorganism
First published in the EFSA Journal
30 aprile 2019
Adopted
4 aprile 2019
Type
Scientific Opinion

Abstract

The food enzyme endo‐1,4‐β‐xylanase (4‐β‐d‐xylan xylanohydrolase; EC 3.2.1.8) is produced with a genetically modified Bacillus licheniformis (strain NZYM‐CE) by Novozymes A/S. The genetic modifications do not give rise to safety concerns. The food enzyme is free from viable cells of the production organism and recombinant DNA. This xylanase is intended to be used in baking and cereal‐based processes. Based on the maximum use levels recommended for the respective food processes and individual data from the EFSA Comprehensive European Food Consumption Database, dietary exposure to the food enzyme–total organic solids (TOS) was estimated to be up to 0.012 mg TOS/kg body weight (bw) per day in European populations. Genotoxicity tests did not indicate a genotoxic concern. The systemic toxicity was assessed by a repeated dose 90‐day oral toxicity study in rats. The Panel identified a no observed adverse effect level (NOAEL) of at least 1,020 mg TOS/kg bw per day, the highest dose tested. When the NOAEL value is compared to the estimated dietary exposure, this results in a margin of exposure (MoE) of at least 85,000. 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, the risk of allergic sensitisation and elicitation reactions upon dietary exposure to this food enzyme cannot be excluded, but the likelihood is considered to be low. Overall, the Panel concluded that based on the data provided and the derived MoE, this food enzyme does not give rise to safety concerns under the intended conditions of use.

Panel members at the time of adoption

José Manuel Barat Baviera, Claudia Bolognesi, Beat Johannes Brüschweiler, Andrew Chesson, Pier Sandro Cocconcelli, Riccardo Crebelli, David Michael Gott, Konrad Grob, Evgenia Lampi, Alicja Mortensen, Gilles Rivière, Vittorio Silano, Inger‐Lise Steffensen, Christina Tlustos, Henk van Loveren, Laurence Vernis, Holger Zorn.
Panel on Food Contact Materials, Enzymes and Processing Aids
Contact
fip [at] efsa.europa.eu
doi
10.2903/j.efsa.2019.5685
EFSA Journal 2019;17(4):5685
Question Number
On request from
European Commission
Disclaimer
The full opinion will be published in accordance with Article 12 of Regulation (EC) No 1331/2008 once the decision on confidentiality will be received from the European Commission.