Enzymatic modification to boost vegetable protein gelling

By staff reporter

- Last updated on GMT

Related tags Innovative food science Protein

Modifying vegetable protein with transglutaminase enzymes improves
the gelling properties, claim German researchers - a result that
may offer value-added solutions for a wide range of food products.

Writing in the journal Innovative Food Science and Emerging Technologies​, lead author Christian Schafer explained the proteins from vegetables "represent a valuable alternative to animal proteins for the manufacture of texturised foodstuffs"​, but they remain an unexploited ingredient, "due to the poor gelling properties of the native proteins".​ This is not the first report on using TGase to modify the functional properties of proteins. Indeed, previous studies have looked at the effect of this enzyme on casein, soy proteins, whey proteins, myosin, and globulin. The researchers, from the Fraunhofer Institute for Process Engineering and Packaging, the Technical University Munich, and Hohenheim University, investigated the cross-linking of MTG (Activa, Ajinomoto) on two commercial vegetable proteins, one derived from soy (SPI, "Supro", DuPont) and one derived from pea (PPI, "Pisane," Cosucra). Schafer and co-workers report that the transglutaminase enzyme substantially modified the vegetable protein and gel strengths were found to increase significantly during incubation with MTG. The soy gel strength was reported to have increased by 155 per cent, while pea protein gel strength increased by 300 per cent. "Superior gel firmness of PPI samples may not exclusively be attributed to the higher concentration of pea protein (18 per cent), which exceeded that of the soy protein by four per cent,"​ wrote the researchers. "It is more likely that different positions of lysine cross-links, generated in PPI, have a greater impact on gelation than in the case of SPI.""MTG-induced formation of lysine cross-links significantly enhanced the gelation of pea and soy protein isolates in the food model used,"​ concluded the researchers. Currently there is only a limited selection of cross-linking enzymes on the market, with microbial transglutaminase (MTG) being the most widely used enzyme for modifying the structure of food. Source: Innovative Food Science and Emerging Technologies​ (Elsevier) Published on-line ahead of print, doi: 10.1016/j.ifset.2007.01.005 "Comparative study of gelation and cross-link formation during enzymatic texturisation of leguminous proteins" ​Authors: C. Schafer, C. Zacherl, K.-H. Engel, S. Neidhart, R. Carle

Related news

Show more

Related products

show more

Vanillin to boost your sensory experience

Vanillin to boost your sensory experience

Content provided by Univar Solutions | 18-Sep-2023 | Product Brochure

From specialty ingredient innovation to recipe testing, food brands of all sizes turn to Foodology by Univar Solutions for help tackling product development...

A Sustainably Sourced Natural Yeast Protein

A Sustainably Sourced Natural Yeast Protein

Content provided by Angel Yeast – Yeast and Baking Ingredients | 29-Aug-2023 | White Paper

Get ready to revolutionize your protein game sustainably with AngeoPro! With an impressive 80% protein content and essential amino acids, AngeoPro is a...

(Even Better) Better-For-You Extruded Snacks

(Even Better) Better-For-You Extruded Snacks

Content provided by Applied Food Sciences | 21-Aug-2023 | White Paper

For health-conscious or dietarily-restricted shoppers, the snack aisle can seem daunting. Package claims like high in protein, plant-based, and gluten-free...

Related suppliers

Follow us


View more