Ethionine

Ethionine is a non-proteinogenic amino acid structurally related to methionine, with an ethyl group in place of the methyl group.

Quick facts Names, Identifiers ...

Ethionine

Names
IUPAC name 2-Amino-4-ethylsulfanylbutyric acid
Other names S-Ethyl-L-homocysteine
Identifiers
CAS Number	13073-35-3 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:4886 N
ChEMBL	ChEMBL203187 N
ChemSpider	5970 Y
ECHA InfoCard	100.000.588
PubChem CID	6205
UNII	WX1BN24WZT Y
CompTox Dashboard (EPA)	DTXSID0020579
InChI InChI=1S/C6H13NO2S/c1-2-10-4-3-5(7)6(8)9/h5H,2-4,7H2,1H3,(H,8,9) Y Key: GGLZPLKKBSSKCX-UHFFFAOYSA-N Y InChI=1/C6H13NO2S/c1-2-10-4-3-5(7)6(8)9/h5H,2-4,7H2,1H3,(H,8,9) Key: GGLZPLKKBSSKCX-UHFFFAOYAB
SMILES O=C(O)C(N)CCSCC
Properties
Chemical formula	C6H13NO2S
Molar mass	163.239 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

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Ethionine is an antimetabolite and methionine antagonist. It is a substrate for methionyl-tRNA synthetase and is incorporated into proteins.^[1]

Ethionine has been found to naturally occur in the edible pulp of the durian fruit, and postulated to be a biosynthetic precursor for ethanethiol and other strong odorants found in the fruit.^[2]