Aspartokinase, or aspartate kinase, is an enzyme that catalyzes the phosphorylation of the amino acid aspartate. This reaction is the first step in the biosynthesis of three essential amino acids: methionine, lysine, and threonine, known as the `aspartate family`. The gene for aspartokinase is present only in microorganisms and plants; it is not.....
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http://en.wikipedia.org/wiki/Aspartokinase
(from the article `metabolism`) ...regulated as are the rates of lysine, methionine, and isoleucine, an imbalance in the supply of isoleucine might result. This risk is overcome in ... ...source of nitrogen available to them, it would not be necessary for the bacteria to synthesize enzymes required for the formation of amino acids ... ...
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http://www.britannica.com/eb/a-z/a/113
Enzyme that phosphorylates L-aspartate to produce aspartyl phosphate.
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http://www.encyclo.co.uk/visitor-contributions.php
No exact match found.
