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Cysteine containing selenium in place of one sulfur atom.


The biologically active form of selenium when attached to cysteine, an amino acid.
References in periodicals archive ?
Optimal daily dosing usually requires about 200 mcg, divided into the selenite, selenomethionine, and selenocysteine forms of selenium.
Recently, a considerable incorporation of selenocysteine (SeCys) in proteins of the yeast proteome despite the absence of the uracil-guanine-adenine codon was demonstrated (Bierla et al.
Additionally selenium is a part of selenocysteine and selenomethionine proteins, the main amino acid constituent of these enzymes is selenocysteine, located in the active sites?
EF1[alpha] is one of the most abundant proteins, and responsible for the delivery of all aminoacyl-tRNAs to the ribosome, aside from initiator and selenocysteine tRNAs (Mateyak & Kinzy 2010).
This enzyme (which has a single selenocysteine group at the active site) catalyses die conversion of thyroxine, the major hormone product of the thyroid gland to the more biologically-active hormone, trii-odothyronine (T3).
KEY WORDS: nanotoxicology, proliferation, selenium, selenocysteine, silver nanoparticles, thioredoxin reductase.
Nematode selenoproteome: the use of the selenocysteine insertion system to decode one codon in an animal genome?
Selenium as a causative factor for goitre formation has been explained by diminished activity of selenocysteine enzymes in thyroid, notably glutathione peroxidase and deiodinase type-1 in selenium deficiency (29,30).
The team, led by Ohad Birk of the Ben-Gurion University, determined that the defect is associated with the production of the 21st amino acid, selenocysteine (SEC), which leads to progressive brain atrophy.
thaliana plants expressing a selenocysteine methyltransferase (SMTA) isolated from the Se hyperaccumulator, Astragalus bisculcatus, accumulated methylselenocysteine and contained up to eight-fold higher Se concentrations than the wild-type plants, when grown on a soil supplemented with selenite (Se[O.
High-selenium yeast contains several different natural anabolic and catabolic forms of organically-bound selenium in addition to SeMet, such as selenocysteine, methylselenocysteine, and several other selenium compounds, all organically bound.
The content of other organic selenium compounds, including selenocysteine, does not exceed 10%.