Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of various enzymes that catalyze the transfer of a phosphate group from a donor, such as ADP or ATP, to an acceptor.
from The Century Dictionary.
- noun A ferment-like body which is capable of rendering physiologically active another ferment and thus produces chemical changes in a third body while in itself it is apparently inert.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Biochemistry) One of a class of enzymes that catalyze transfer of a phosphate group from ATP to another molecule; it is a type of phosphorylase.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry Any of a group of
enzymes that transfersphosphate groups from high-energy donor molecules, such asATP , to specific target molecules (substrates ); the process is termedphosphorylation .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an enzyme that catalyzes the conversion of a proenzyme to an active enzyme
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Not always necessarily at the same time, but at least to be able to look at protein kinase activity, redox state, gene transcription, protein degradation, localization of DNAs and RNAs by slightly more indirect means, which if you use GFP and RFP to label a protein that in turn binds specifically to your favourite nucleic acid, and the list goes on and on.
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This enzyme, called protein kinase G (PKG), is turned on and activated in response to injury or inflammation.
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These included Viesturs Simanis, Sergio Moreno and Kathy Gould, who between them worked out that cdc2 encoded a protein kinase that was regulated during the cell cycle and was controlled by tyrosine phosphorylation.
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The stronger stimulus will give rise to increased levels of the messenger molecule cAMP and thereby protein kinase A.
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These messengers travel into the cell and activate a protein kinase, which starts to bind phosphate groups to other proteins, in this way altering their function.
The Nobel Prize in Physiology or Medicine 2000 - Presentation Speech 2000
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This was eventually solved with the finding of the cyclic AMP-dependent protein kinase by one of my postdoctoral fellows, Donal A. Walsh.
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A protein kinase moves a phosphate group (P) from ATP (ADP (P)) to the protein.
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In several instances an erroneously regulated protein kinase activity is responsible.
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A protein kinase moves a phosphate group from ATP to the protein.
MedPoster1992 1992
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The fact that cyclic AMP mediates its effects via stimulation of a protein kinase activating the enzyme phosphorylase explains how a hormone signal can lead to quick mobilization of sugar.
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