Journal
FRONTIERS IN NUTRITION
Volume 8, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fnut.2021.685517
Keywords
low-density lipoprotein receptor-related protein; lysozome; selenoprotein synthesis; ApoER2; LRP1; megalin; selenium transport system
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Funding
- KAKENHI from the Japan Society for the Promotion of Science (JSPS) [20H00488, 20H05491]
- BINDS from Japan Agency for Medical Research and Development (AMED)
- [20ek0210144h0001]
- Grants-in-Aid for Scientific Research [20H00488, 20H05491] Funding Source: KAKEN
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SELENOP is a selenium-containing protein primarily produced in the liver, playing a pivotal role in selenium metabolism and antioxidative defense. It can reduce phospholipid hydroperoxides and deliver selenium to other tissues, but decreased or excessive levels can cause various dysfunctions. This review focuses on SELENOP's selenium transport system, molecular mechanism, and its biological significance.
Selenoprotein P (SELENOP) is selenium (Se)-containing protein in plasma, which is primarily produced in the liver. The P in SELENOP originated from the presence in plasma. SELENOP contains selenocysteine, a cysteine analog containing Se instead of sulfur. SELENOP is a multi-functional protein to reduce phospholipid hydroperoxides and to deliver Se from the liver to other tissues, such as those of the brain and testis, playing a pivotal role in Se metabolism and antioxidative defense. Decrease in SELENOP causes various dysfunctions related to Se deficiency and oxidative stress, while excessive SELENOP causes insulin resistance. This review focuses on the Se transport system of SELENOP, particularly its molecular mechanism and physiological role in Se metabolism. Furthermore, the chemical form of Se and its biological meaning is discussed.
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