Diiodotyrosine
Diiodotyrosine (DIT) is an iodinated derivative of the amino acid tyrosine. It is an important intermediate in the synthesis of thyroid hormones.
Structure and Synthesis[edit | edit source]
Diiodotyrosine is formed by the iodination of monoiodotyrosine (MIT) in the thyroid gland. The process involves the addition of two iodine atoms to the tyrosine molecule. The chemical structure of DIT includes a benzene ring with two iodine atoms attached to the 3 and 5 positions, and an amino acid side chain.
Role in Thyroid Hormone Synthesis[edit | edit source]
DIT plays a crucial role in the biosynthesis of thyroid hormones. It combines with MIT to form triiodothyronine (T3) or with another DIT to form thyroxine (T4). These reactions are catalyzed by the enzyme thyroid peroxidase.
Biological Function[edit | edit source]
Thyroid hormones, including T3 and T4, are essential for regulating metabolism, growth, and development in humans. DIT, as a precursor, is therefore vital for maintaining normal physiological functions.
Clinical Significance[edit | edit source]
Abnormalities in the synthesis or metabolism of DIT can lead to thyroid disorders such as hypothyroidism or hyperthyroidism. Monitoring levels of DIT and other iodinated tyrosines can be important in diagnosing and managing these conditions.
See Also[edit | edit source]
References[edit | edit source]
External Links[edit | edit source]
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