Definition of kinase in English:


Line breaks: kin¦ase
Pronunciation: /ˈkʌɪneɪz


[usually with modifier] Biochemistry
  • An enzyme that catalyses the transfer of a phosphate group from ATP to a specified molecule.
    More example sentences
    • In general, protein kinases are enzymes that phosphorylate proteins, which then become activated.
    • Protein kinases turn on other enzymes by a chemical reaction called phosphorylation that adds phosphate tags to proteins.
    • The consequence of these mutations is a cascade phosphorylation of certain serine/threonine protein kinases.


early 20th century: from Greek kinein 'to move' + -ase.

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