title: Antioxidant activities of Se-SPI produced from soybean as accumulation and biotransformation reactor of natural selenium.
abstract: A study to compare the uptake, translocation, and distribution of selenium (Se) in soybean planted in natural seleniferous soil in Fengcheng city of China was conducted to clarify the relationship between the Se content levels of soybean proteins and their radical scavenging activity. The data showed that the total Se content in different parts of soybean plants varied with the growth periods. The selenoprotein (Se-SPI) content increased remarkably with the increase of Se content in seleniferous soils. The Se-SPI content obtained from the region with the highest Se level was almost 18 times higher than that of the control group, while antioxidant activities were about 4-fold compared to the control, suggesting that Se played a positive role in enhancing the antioxidant activity of Se-SPI. The increase in the Se level also led to changes in amino acids composition, but with nearly no effects on the subunit composition of soybean Se-SPI.
authors.affiliation: State Key Laboratory of Food Science and Technology, Nanchang University, Jiangxi 330047, China; Jiangxi Academy of Sciences, Jiangxi 330029, China.
authors.forename: Juwu
authors.initials: J
authors.lastname: Hu
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhao
authors.forename: Xiang
authors.initials: X
authors.lastname: Cheng
authors.forename: Cordelia
authors.initials: C
authors.lastname: Selomulya
authors.forename: Chunqing
authors.initials: C
authors.lastname: Bai
authors.forename: Xuemei
authors.initials: X
authors.lastname: Zhu
authors.forename: Xionghui
authors.initials: X
authors.lastname: Li
authors.forename: Hua
authors.initials: H
authors.lastname: Xiong
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000378:metabolism*; D001711:Biotransformation; D010940:Plant Proteins / Q000737:chemistry / Q000378:metabolism*; D012643:Selenium / Q000032:analysis / Q000378:metabolism; D051140:Selenoproteins / Q000737:chemistry / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D013025:Glycine max / Q000737:chemistry / Q000378:metabolism*
chemical_list: D000975:Antioxidants; D010940:Plant Proteins; D051140:Selenoproteins; D012987:Soil; D012643:Selenium
keywords: Accumulation; Antioxidant activity; Biotransformation; Selenium; Selenoprotein; Soybean