A Super Stable Mutant of the Plant Protein Monellin Endowed with Enhanced Sweetness.
high intensity sweeteners
sensory analysis
shelf life
single-chain monellin (MNEI)
sweet proteins
thermochemical stability
Journal
Life (Basel, Switzerland)
ISSN: 2075-1729
Titre abrégé: Life (Basel)
Pays: Switzerland
ID NLM: 101580444
Informations de publication
Date de publication:
12 Mar 2021
12 Mar 2021
Historique:
received:
26
02
2021
revised:
08
03
2021
accepted:
11
03
2021
entrez:
3
4
2021
pubmed:
4
4
2021
medline:
4
4
2021
Statut:
epublish
Résumé
Sweet proteins are a class of proteins with the ability to elicit a sweet sensation in humans upon interaction with sweet taste receptor T1R2/T1R3. Single-chain Monellin, MNEI, is among the sweetest proteins known and it could replace sugar in many food and beverage recipes. Nonetheless, its use is limited by low stability and high aggregation propensity at neutral pH. To solve this inconvenience, we designed a new construct of MNEI, dubbed Mut9, which led to gains in both sweetness and stability. Mut9 showed an extraordinary stability in acidic and neutral environments, where we observed a melting temperature over 20 °C higher than that of MNEI. In addition, Mut9 resulted twice as sweet than MNEI. Both proteins were extensively characterized by biophysical and sensory analyses. Notably, Mut9 preserved its structure and function even after 10 min boiling, with the greatest differences being observed at pH 6.8, where it remained folded and sweet, whereas MNEI lost its structure and function. Finally, we performed a 6-month shelf-life assessment, and the data confirmed the greater stability of the new construct in a wide range of conditions. These data prove that Mut9 has an even greater potential for food and beverage applications than MNEI.
Identifiants
pubmed: 33809397
pii: life11030236
doi: 10.3390/life11030236
pmc: PMC7999979
pii:
doi:
Types de publication
Journal Article
Langues
eng
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