Exact Mass: 270.0119
Exact Mass Matches: 270.0119
Found 5 metabolites which its exact mass value is equals to given mass value 270.0119,
within given mass tolerance error 4.0E-5 dalton. Try search metabolite list with more accurate mass tolerance error
8.0E-6 dalton.
Selenocystathionine
Selenocystathionine (CAS: 2196-58-9), also known as SeCysta, belongs to the class of organic compounds known as alpha-amino acids. These are amino acids in which the amino group is attached to the carbon atom immediately adjacent to the carboxylate group (alpha carbon). Selenocystathionine is a very strong basic compound (based on its pKa). Selenocystathionine participates in a number of enzymatic reactions. In particular, selenocystathionine can be converted into selenocysteine and 2-ketobutyric acid through the action of the enzyme cystathionine gamma-lyase. Selenocystathionine is formed from selenohomocysteine by the enzyme cystathionine beta-synthase (EC 4.2.1.22) as a by-product of cystathionine synthesis. Selenocystathionine is consumed in the diet and is one of the main compounds present in plants that tend to hyperaccumulate selenium for use as an elemental plant defence mechanism (PMID: 10026151, 6456763, 16920881). Selenocystathionine is formed from Selenohomocysteine by the enzyme cystathionine beta-synthase (EC 4.2.1.22), as a by-product of cystathionine synthesis. Selenocystathionine is consumed in the diet, and is one of the main compounds present in plants that tend to hyperaccumulate selenium and use it as an elemental plant defense mechanism. (PMID: 10026151, 6456763, 16920881) [HMDB]
(2S)-2-ammonio-4-{[(2R)-2-ammonio-2-carboxylatoethyl]selanyl}butanoate
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L-Selenocystathionine
An optically active form of selenocystathionine in which both amino acid residues have L-configuration.
Selenocystathionine
A member of the class of cystathionines derived from homoselenocysteine and serine residues joined by a selenide bond.
L-selenocystathionine zwitterion
An amino acid zwitterion arising from transfer of two protons from the carboxy to the amino groups of L-selenocystathionine; major species at pH 7.3.
