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Transglutaminase from newly isolated Streptomyces sp CBMAI 1617: Production optimization, characterization and evaluation in wheat protein and dough systems
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi.
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2018 (Engelska)Ingår i: Food Chemistry, ISSN 0308-8146, E-ISSN 1873-7072, Vol. 241, s. 403-410Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
ELSEVIER SCI LTD , 2018. Vol. 241, s. 403-410
Nyckelord [en]
Transglutaminase, Enzyme production, Wheat protein polymers, Cross-linking
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Kemi
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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

Tillgänglig från: 2017-10-19 Skapad: 2017-10-19 Senast uppdaterad: 2017-11-14Bibliografiskt granskad

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Hedenqvist, Mikael S.

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