Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
1. a subclass of the transferases, comprising the enzymes that catalyze the transfer of a high-energy group from a donor (usually ATP) to an acceptor, and named, according to the acceptor, as creatine kinase, fructokinase, etc.
2. an enzyme that activates a zymogen, named, according to its source, such as enterokinase, streptokinase, etc.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
1. Enzyme that catalyzes conversion of a proenzyme to an active one (for example, enteropeptidase [enterokinase]). Important in salvage and recycling of nucleotides. Some antiviral agents work by inactivating viral or tumor kinases
2. Suffix attached to some enzymes to indicate transformation.
Farlex Partner Medical Dictionary © Farlex 2012
kinase(kī′nās′, -nāz′, kĭn′ās′, -āz′)
Any of various enzymes that catalyze the transfer of a phosphate group from a donor, such as ADP or ATP, to an acceptor protein. Kinases regulate many essential cellular processes.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
1. An enzyme catalyzing the conversion of a proenzyme to an active enzyme.
2. An enzyme catalyzing the transfer of phosphate groups to form triphosphates (e.g., adenosine triphosphate).
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
kinasean enzyme that catalyses the transfer of a phosphoryl group from ATP to another compound.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005