iodotyrosine
Học thuậtThân thiện
Definition
Noun: 1. A tyrosine derivative containing iodine: A chemical compound formed by the addition of iodine to the amino acid tyrosine. It is a precursor in the biosynthesis of thyroid hormones.
Usage
- Scientific/Biochemical Context: The term is used almost exclusively in biochemistry, endocrinology, and medical contexts to describe specific iodinated amino acids.
- Monoiodotyrosine and diiodotyrosine are the two primary forms of iodotyrosine.
- The enzyme thyroid peroxidase catalyzes the formation of iodotyrosine from tyrosine within the thyroid gland.
Advanced Usage
- Specific Compounds: The term often appears modified to specify the number of iodine atoms attached.
- Monoiodotyrosine (MIT): Tyrosine with one iodine atom attached.
- Diiodotyrosine (DIT): Tyrosine with two iodine atoms attached.
- Physiological Role: Used to describe intermediates in a metabolic pathway.
- The coupling of two iodotyrosine molecules (DIT + DIT) forms thyroxine (T4).
Variants and Related Words
- Iodotyrosine deiodinase: An enzyme that removes iodine from iodotyrosine, allowing iodine to be recycled within the thyroid gland.
- Tyrosine: The parent amino acid to which iodine is added to form iodotyrosine.
Synonyms
- Iodinated tyrosine
- (Specific forms) Monoiodotyrosine, Diiodotyrosine
Different Meanings
This word has a single, highly specific meaning in biochemistry and does not have other common definitions or usages in general English.
Noun
- tyrosine with iodine added