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Transglutaminase from newly isolated Streptomyces sp CBMAI 1617: Production optimization, characterization and evaluation in wheat protein and dough systems
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
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2018 (English)In: Food Chemistry, ISSN 0308-8146, E-ISSN 1873-7072, Vol. 241, p. 403-410Article in journal (Refereed) Published
Abstract [en]

The popularity of transglutaminase (TG) by the food industry and the variation in functionality of this enzyme from different origins, prompted us to isolate and evaluate a high-yielding TG strain. Through the statistical approaches, Plackett-Burman and response surface methodology, a low cost fermentation media was obtained to produce 6.074 +/- 0.019 U mL(-1) of TG from a novel source; Streptomyces sp. CBMAI 1617 (SB6). Its potential exploitation was compared to commonly used TG, from Streptomyces mobaraensis. Biochemical and FT-IR studies indicated differences between SB6 and commercial TG (Biobond (TM) TG-M). Additions of TG to wheat protein and flour based doughs revealed that the dough stretching depended on the wheat protein fraction, TG amount and its origin. A higher degree of cross-linking of glutenins and of inclusion of gliadin in the polymers was seen for SB6 as compared to commercial TG. Thus, our results support the potential of SB6 to tailor wheat protein properties within various food applications.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD , 2018. Vol. 241, p. 403-410
Keywords [en]
Transglutaminase, Enzyme production, Wheat protein polymers, Cross-linking
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-215772DOI: 10.1016/j.foodchem.2017.09.010ISI: 000411624400050PubMedID: 28958547Scopus ID: 2-s2.0-85029153897OAI: oai:DiVA.org:kth-215772DiVA, id: diva2:1150548
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QC 20171019

Available from: 2017-10-19 Created: 2017-10-19 Last updated: 2017-11-14Bibliographically approved

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Hedenqvist, Mikael S.

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