Isolation and identification of three water-soluble selenoproteins in Se-enriched Agaricus blazei Murrill.

Agaricus blazei

Immune support

SpeciesAlmond Mushroom, ABM

JournalFood chemistry

Year2021

Key points

Selenoproteins in selenium (Se)-enriched vegetables play an important role in human health
In this study, three water-soluble selenoproteins PR-Se-1, PR-Se-2 and PR-Se-3 in Agaricus blazei Murrill (ABM) were isolated by anion exchange chromatography, gel filtration chromatography and SDS-PAGE. Sequence analyses performed by HPLC-MS/MS showed that PR-Se-1, a 114024 Da selenoprotein with 1019 amino acids (AAs), is an isoenzyme of isocitrate dehydrogenase
PR-Se-2, a 53983 Da selenoprotein with 508 AAs, is a kind of dihydrolipoyl dehydrogenase
PR-Se-3, a 47179 Da selenoprotein with 415 AAs, is a kind d-proline reductase
Se content is high at 26.1 μg/g, and selenocystine is the predominant Se unit in the three selenoproteins
Se content of ABM is 9.15 μg/g, and the organic form of Se accounts for ~81% of total Se content

Metadata-grounded summary

Citation abstract

Selenoproteins in selenium (Se)-enriched vegetables play an important role in human health. In this study, three water-soluble selenoproteins PR-Se-1, PR-Se-2 and PR-Se-3 in Agaricus blazei Murrill (ABM) were isolated by anion exchange chromatography, gel filtration chromatography and SDS-PAGE. Sequence analyses performed by HPLC-MS/MS showed that PR-Se-1, a 114024 Da selenoprotein with 1019 amino acids (AAs), is an isoenzyme of isocitrate dehydrogenase. PR-Se-2, a 53983 Da selenoprotein with 508 AAs, is a kind of dihydrolipoyl dehydrogenase. PR-Se-3, a 47179 Da selenoprotein with 415 AAs, is a kind d-proline reductase. Se content is high at 26.1 μg/g, and selenocystine is the predominant Se unit in the three selenoproteins. Se content of ABM is 9.15 μg/g, and the organic form of Se accounts for ~81% of total Se content. ABM could be a promising source of Se in Se-poor regions.

Citation

Hu Z, Yao Y, Lv M, Zhang Y, Zhang L, Yuan Y, et al. (2021). Isolation and identification of three water-soluble selenoproteins in Se-enriched Agaricus blazei Murrill. Food chemistry https://doi.org/10.1016/j.foodchem.2020.128691 PMID: 33248838

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