Effect of the phosphonic analogue of tyrosine on tyrosine iodination.

Autor: Iron, A., Neuzil, E., Cassaigne, A.
Zdroj: Amino Acids; Feb1994, Vol. 7 Issue 1, p97-103, 7p
Abstrakt: Depositing of dl-1-amino-2-( p-hydroxyphenyl)-ethylphosphonic acid (Tyr-P) on the chicken embryo induced a dose dependent decrease of the iodine uptake by the embryonic thyroid. Tyr-P interfered on iodination of tyrosine when tested with hog thyroid peroxidase (TPO) and with bovine lactoperoxidase (LPO); the analogue was recognized by the two enzymes but its affinity for TPO and LPO was respectively 3 and 7 fold higher compared with that of the natural substrate, suggesting that Tyr-P may act as an iodine trap. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index