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Sinapine
Chemical compound From Wikipedia, the free encyclopedia
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Sinapine is an alkaloidal amine found in some seeds, particularly oil seeds of plants in the family Brassicaceae.[2] It is the choline ester of sinapic acid.
Sinapine was discovered by Étienne-Ossian Henry in 1825.[3]
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Occurrence
Sinapine typically occurs in the outer seed coat of oil crops and is plentiful in some types of press cake leftover after vegetable oil extraction.[2] Typical oil seed cake residues high in sinapine include Brassica juncea (1.22% by mass),[4] and rapeseed (0.39-1.06% by mass).[5]
Isolation
The typical protocol for extracting Sinapine from seed cakes entails defatting the cake with hexane via a Soxhlet apparatus followed by extraction with 70% methanol held at 75 °C.[6]
Metabolism
Sinapine esterase is an enzyme whose two substrates are sinapine and H2O and whose two products are sinapic acid and choline.
Sinapoylglucose—choline O-sinapoyltransferase is an enzyme whose two substrates are 1-O-sinapoyl-β-D-glucose and choline, whereas its two products are D-glucose and sinapine.
See also
References
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