selenocysteine love

Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry A naturally-occurring amino acid, present in several enzymes, whose structure is that of cysteine but with the sulfur atom replaced by one of selenium

Etymologies

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Examples

  • So it will need to be consistent not with merely the ribosome and the bacterial flagella, but also the octopus's eye, the panda's thumb, and the jerry-rigged way that selenocysteine is kluged into the genetic code.

    Analogy, How Scientifically Powerful is It?

  • The awkward way in which selenocysteine is kluged into the genetic code (which is not unique to Tetrahymena; we do it too), sharing a termination codon instead of having one to itself seems like a good example of a molecular "panda's thumb," reflecting the inherent difficulty of a late addition to the frozen accident of the genetic code.

    Another Protozoan and Front-Loading

  • The third termination codon, UGA, does signal for termination, but can also be used in a context-dependent manner (depending on RNA structure) to code the amino acid, selenocysteine.

    Another Protozoan and Front-Loading

  • Although all forms of selenium described above are fairly well absorbed by the body, some studies show a slight edge to selenomethionine over selenocysteine, selenocysteine over sodium selenate, and sodium selenate over sodium selenite.

    The World's Healthiest Foods

  • The most widely-available are selenomethionine and selenocysteine.

    The World's Healthiest Foods

  • Instead, they possess a linked thioredoxin-glutathione system with a selenocysteine-containing enzyme thioredoxin glutathione reductase (TGR) as the single redox hub that controls the overall redox homeostasis.

    BioMed Central - Latest articles

  • Specific gene sets associated with the central metabolism of C. aurimucosum apparently provide enhanced metabolic flexibility and adaptability in aerobic, anaerobic and low-pH environments, including gene clusters for the uptake and degradation of aromatic amines, L-histidine and L-tartrate as well as a gene region for the formation of selenocysteine and its incorporation into formate dehydrogenase.

    BioMed Central - Latest articles

  • The European Food Safety Authority (EFSA) has said there is insufficient data to back the safety of the selemium form, Se-methyl-L-selenocysteine (Semethylselenocysteine), in food supplements.

    NutraIngredients RSS

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