A novel low-temperature-active pectin methylesterase from Penicillium chrysogenum F46 with high efficiency in fruit firming.
Food Chem
; 162: 229-34, 2014 Nov 01.
Article
en En
| MEDLINE
| ID: mdl-24874380
ABSTRACT
A pectin methylesterase gene (pe8F46) was cloned from Penicillium chrysogenum F46 and successfully expressed in Pichia pastoris. The full-length cDNA consists of 969 bp and encodes a 322-residue polypeptide with the calculated molecular weight of 34.1 kDa. Deduced PE8F46 belongs to family 8 of carbohydrate esterases and shares 54% identity with a functionally characterised counterpart from Myceliophthora thermophile. Purified recombinant PE8F46 showed the optimal activity at pH 5.0 and 40°C, and remained 52% maximum activity even at 10°C. An orthogonal experiment was employed to determine the best conditions for firming pineapple dices. After incubation with 0.75% (w/v) PE8F46 and 0.4% calcium lactate (w/v) for 20 min, the firmness of pineapple dices was improved by 47.6%, 13.7% higher than that of a commercial pectinase complex. These results suggest that PE8F46 has application potential in the food industry.
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Bases de datos:
MEDLINE
Asunto principal:
Penicillium chrysogenum
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Hidrolasas de Éster Carboxílico
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Frío
/
Frutas
Idioma:
En
Revista:
Food Chem
Año:
2014
Tipo del documento:
Article