New hydantoinases from thermophilic microorganisms — Synthesis of enantiomerically pure D-amino acids
摘要:
A series of 14 D-alpha-amino acids were prepared in high chemical and optical yields from the corresponding racemic hydantoins by employing two novel hydantoinases from om thermophilic microorganisms.
Synthesis of 1S,5R- and 1R,5S-glycoluriles by diastereospecific α-ureidoalkylation of (S)/(R)-N-carbamoyl-α-amino acids with 4,5-dihydroxyimidazolidin-2-one
作者:Il’ya E. Chikunov、Angelina N. Kravchenko、Pavel A. Belyakov、Konstantin A. Lyssenko、Vladimir V. Baranov、Oleg V. Lebedev、Nina N. Makhova
DOI:10.1070/mc2004v014n06abeh002050
日期:2004.1
A diastereospecific method for the synthesis of individual enantiomers of 1S,5R- and 1R,5S-glycoluriles has been developed based on the α-ureidoalkylation of (S)/(R)-N-carbamoyl-α-amino acids with 4,5-dihydroxyimidazolidin-2-one.
Mechanism of Stereospecific Conversion of<scp>dl</scp>-5-Substituted Hydantoins to the Corresponding<scp>l</scp>-Amino Acids by<i>Pseudomonas</i>sp. Strain NS671
The mechanism of stereospecific conversion of dl-5-substituted hydantoins to the corresponding l-amino acids by Pseudomonas sp. strain NS671 was studied. The results indicated that the hydantoinase catalyzed the hydrolysis reaction of both d-and l-5-(2-methylthioethyl)hydantoin, and that the hydrolysis of the l-enantiomer proceeded preferentially compared with that of the d-enantiomer. On the basis of these findings, the mechanism was speculated to be as follows: dl-5-substituted hydantoins are converted exclusively to the l-forms of the corresponding N-carbamylamino acids by the hydantoinase in combination with hydantoin racemase. The N-carbamyl-l-amino acids are then converted to l-amino acids by N-carbamyl-l-amino acid amidohydrolase.
Synthesis of Chiral Pyrimidin-2(1H)-ones from N-Carbamoyl Amino Acids
作者:Ilya N. Egorov、Vladimir L. Rusinov、Oleg N. Chupakhin
DOI:10.5560/znb.2013-3129
日期:2013.11.1
A series of previously unknown pyrimidin-2(1H)-ones containing chiral amino acid fragments was synthesized from 1,1,3,3-tetramethoxypropane and N-carbamoyl derivatives of amino acids under acidic conditions.
Verfahren zur Herstellung von D-N-Carbamoyl-alpha-aminosäuren und Mikroorganismen dafür
申请人:BASF Aktiengesellschaft
公开号:EP0046186A2
公开(公告)日:1982-02-24
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von D-Carbamoyl-a-aminosäuren der Formel
worin R die in der Beschreibung angegebene Bedeutung hat, durch enzymatische Spaltung der entsprechenden Hydantoinen mit Hilfe thermophiler, nichtsporenbildender hydantoinspaltender Mikroorganismen oder Extrakten daraus.
本发明涉及一种制备 D-氨基甲酰-a-氨基酸的工艺,其式为
其中 R 的含义见说明,其制备方法是借助嗜热、不形成孢子的海因子裂解微生物或其提取物对相应的海因子进行酶裂解。
Verfahren zur Herstellung von mesophilen Mikroorganismen, die eine bei höherer Temperatur aktive D-Hydantoinase enthalten
申请人:BASF Aktiengesellschaft
公开号:EP0219034A2
公开(公告)日:1987-04-22
Es wird ein gentechnologisches Verfahren zur Herstellung von mesophilen Mikroorganismen, die eine bei höherer Temperatur aktive Hydantoinase enthalten, sowie DNA-Sequenzen, die für diese Enzyme codieren, beschrieben.
本文介绍了一种基因工程工艺,用于生产含有在高温下具有活性的 hydantoinase 的中嗜性微生物和编码这些酶的 DNA 序列。