Ethionine

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

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

Ethionine is an antimetabolite and methionine antagonist. It prevents amino acid incorporation into proteins and interferes with cellular use of adenosine triphosphate (ATP). Because of these pharmacological effects, ethionine is highly toxic and is a potent carcinogen.^[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]