Langimage
English

tyrosinase

|taɪ-rə-si-neɪz|

C2

🇺🇸

/ˌtaɪrəˈsiːneɪz/

🇬🇧

/ˌtaɪrəˈsɪneɪz/

enzyme that oxidizes tyrosine

Etymology
Etymology Information

'tyrosinase' originates from the chemical name 'tyrosine' + the enzyme-forming suffix '-ase'; 'tyrosine' ultimately comes from Greek 'tyros' meaning 'cheese' (named because it was first isolated from cheese), and the suffix '-ase' was coined in biochemistry to denote enzymes.

Historical Evolution

'tyrosinase' developed as a modern biochemical formation by combining the existing noun 'tyrosine' with the productive suffix '-ase' (used since the late 19th century for enzymes), producing the established enzyme name 'tyrosinase'.

Meaning Changes

Initially the root 'tyrosine' referenced a substance isolated from cheese, but over time the derived term 'tyrosinase' has come to specifically denote the enzyme that acts on tyrosine, especially in melanin synthesis.

Meanings by Part of Speech

Noun 1

an oxidase enzyme that catalyzes the oxidation of the amino acid tyrosine (and related monophenols) to dopaquinone; a key enzyme in melanin biosynthesis and browning reactions in plants and fungi.

Tyrosinase activity is essential for melanin production in skin melanocytes.

Synonyms

polyphenol oxidase (related enzyme family)monophenol monooxygenase (descriptive term)

Last updated: 2025/11/26 05:31