Safety evaluation of the food enzyme α‐amylase from the genetically modified Bacillus licheniformis strain DP‐Dzb45

• Main Authors: EFSA Panel on Food Contact Materials, Enzymes and Processing Aids (CEP), Vittorio Silano, José Manuel Barat Baviera, Claudia Bolognesi, Pier Sandro Cocconcelli, Riccardo Crebelli, David Michael Gott, Konrad Grob, Claude Lambré, Evgenia Lampi, Marcel Mengelers, Alicja Mortensen, Gilles Rivière, Inger‐Lise Steffensen, Christina Tlustos, Henk van Loveren, Laurence Vernis, Holger Zorn, Boet Glandorf, Lieve Herman, Magdalena Andryszkiewicz, Ana Gomes, Natália Kovalkovičová, Yi Liu, Joaquim Maia, Andrew Chesson
• Format: Article
• Language: English
• Published: Wiley 2020-11-01
• Series: EFSA Journal
• Subjects: food enzyme; α‐amylase; 1,4‐α‐d‐glucan glucanohydrolase; EC 3.2.1.1; glycogenase; Bacillus licheniformis
• Online Access: https://doi.org/10.2903/j.efsa.2020.6311

Abstract The food enzyme α‐amylase (1,4‐α‐D‐glucan glucanohydrolase; EC 3.2.1.1) is produced with the genetically modified Bacillus licheniformis strain DP‐Dzb45 by Danisco US Inc. The production strain of the food enzyme contains multiple copies of an antimicrobial resistance gene. However, based on the absence of viable cells and DNA from the production organism in the food enzyme, this was not considered to be a risk. The α‐amylase is intended to be used in brewing processes and distilled alcohol production. Since residual amounts of the food enzyme are removed by distillation, no dietary exposure was calculated for this intended use. Based on the maximum use levels recommended for the brewing 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 0.138 mg TOS/kg body weight per day in European populations. Toxicological tests with the food enzyme indicated that there was no concern with respect to genotoxicity or systemic toxicity. A no observed adverse effect level was identified in rats, which, compared with the dietary exposure, results in a margin of exposure of at least 484. Similarity of the amino acid sequence to those of known allergens was searched and one match was found. The Panel considered that, under the intended conditions of use, the risk of allergic sensitisation and elicitation reactions can be excluded in distilled alcohol production but cannot be excluded when the enzyme is used in brewing. 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.