Cystathionine

Cystathionine


Structure de la cystathionine
Identification
No CAS 56-88-2
No ECHA 100.000.269
No CE 200-295-8
PubChem 439258
ChEBI 17482
SMILES
InChI
Propriétés chimiques
Formule C7H14N2O4S  [Isomères]
Masse molaire[1] 222,262 ± 0,013 g/mol
C 37,83 %, H 6,35 %, N 12,6 %, O 28,79 %, S 14,43 %,

Unités du SI et CNTP, sauf indication contraire.

La cystathionine est un intermédiaire de la biosynthèse de la cystéine. Il est produit à partir de l'homocystéine et de la sérine par la cystathionine bêta-synthase et est clivé en cystéine et acide alpha-cétobutyrique par la cystathionine gamma-lyase.

L'excès de cystathionine dans l'urine est appelée cystathioninurie.

Métabolisme de la cystéine. En haut, réaction catalysée par la cystathionine bêta synthase ; en bas, réaction catalysée par la cystathionine gamma-lyase.

Notes et références

  1. Masse molaire calculée d’après « Atomic weights of the elements 2007 », sur www.chem.qmul.ac.uk.

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