The selenium enriched protein powder was prepared from Chlamys nobilis by enzymatic hydrolysis and its nutrition was evaluated in order to lay a preliminary foundation for the development of selenium enriched nutritional health food of scallop. Taking the degree of hydrolysis and selenium dissolution rate as indexes, after screening the proteases, the optimal enzymatic hydrolysis process was optimized by response surface methodology. The selenium rich protein powder was evaluated from molecular weight distribution, peptide mass spectrometry, amino acid composition and mineral composition. Neutral protease was used to optimize the process. The results showed that the optimal enzymatic hydrolysis process was as follows: Enzymatic hydrolysis temperature was 53 ℃ with material-liquid ratio of 1∶3.8 and enzyme amount of 4 885 U/g. The peptide mass spectrometry detection revealed that the peptide amount of 0-1 200 m/z increased during the enzymolysis process. After 6 h of enzymatic hydrolysis, the hydrolysis degree reached 46.95%, and the dissolution rate of selenium was up to 97.02%. The proportion of components with molecular weight less than 3 kDa in the enzymatic hydrolysis product was up to 67%. Moreover, the protein content of the selenium rich protein powder was 82.58%, and the content of essential amino acids accounted for 37.57% of the total amino acids. Furthermore, the essential amino acid index was 122.01%. The first restricted amino acid was valine, the selenium content was 1.80 μg/g which is much higher than the selenium standard of food (0.15 μg/g). The contents of trace elements such as Mn, Cu and Zn were relatively high. The selenium rich protein powder of Chlamys nobilis was rich in small molecular peptides that are easy to be absorbed by human body. It was rich in minerals, especially selenium. It can be used for the development of selenium rich food or health products.
WANG Renjia
,
CAO Wenhong
,
ZHANG Chaohua
,
QIN Xiaoming
,
GAO Jialong
,
ZHENG Huina
,
LIN Haisheng
. Optimization of enzymatic processing and nutritional evaluation of selenium-enriched protein powder of Chlamys nobilis[J]. Food and Fermentation Industries, 2022
, 48(10)
: 84
-92
.
DOI: 10.13995/j.cnki.11-1802/ts.030230
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