翻訳と辞書 Words near each other ・ Asparagusic acid ・ Asparazgaleh ・ Aspari ・ Aspariegos ・ Asparigun ・ Asparn an der Zaya ・ Asparrena ・ Aspartame ・ Aspartame controversy ・ Aspartame-acesulfame salt ・ Aspartate 1-decarboxylase ・ Aspartate 4-decarboxylase ・ Aspartate ammonia-lyase ・ Aspartate carbamoyltransferase ・ Aspartate dehydrogenase ・ Aspartate kinase ・ Aspartate N-acetyltransferase ・ Aspartate protease ・ Aspartate racemase ・ Aspartate receptor ・ Aspartate transaminase ・ Aspartate-semialdehyde dehydrogenase ・ Aspartate—ammonia ligase ・ Aspartate—ammonia ligase (ADP-forming) ・ Aspartate—phenylpyruvate transaminase ・ Aspartate—prephenate aminotransferase ・ Aspartate—tRNA ligase ・ Aspartate—tRNA(Asn) ligase ・ Aspartic acid ・ Aspartic acid (data page) Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Aspartate kinase ： ウィキペディア英語版 Aspartate kinase Aspartate kinase (''aspartokinase'', ''aspartic 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 present in animals, which must obtain aspartate-family amino acids in their diet. In ''Escherichia coli'', aspartokinase is present as three independently regulated isozymes, each of which is specific to one of the three downstream biochemical pathways. This allows the independent regulation of the rates of methionine, lysine, and threonine production. The forms that produce threonine and lysine are subject to feedback inhibition, and all three can be repressed at the level of gene expression by high concentrations of their end-products. Absence from animals makes these enzymes key targets for new herbicides and biocides and for improvements in nutritional value of crops. This protein may use the morpheein model of allosteric regulation. ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Aspartate kinase」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.