d‐Fructose‐6‐phosphate aldolase (FSA) was probed for extended nucleophile promiscuity by using a series of fluorogenic substrates to reveal retro‐aldol activity. Four nucleophiles ethanal, propanone, butanone, and cyclopentanone were subsequently confirmed to be non‐natural substrates in the synthesis direction using the wild‐type enzyme and its D6H variant. This exceptional widening of the nucleophile substrate scope
Acid-base catalysis of the elimination and isomerization reactions of triose phosphates
作者:John P. Richard
DOI:10.1021/ja00329a050
日期:1984.8
Etude comparative des constantes de vitesse d'isomerisation catalysee par un tampon et un enzyme du phosphate-3 du glyceraldehyde et du phosphate de dihydroxyacetone via un intermediaire enediolate
研究比较desconstantes de vitesse d'isomerisation catalysee par un tampon et un酶du phosphate-3 du glyceraldehyde et du phosphate de dihydroxyacetone via un intermediaire enediolate
Straightforward Synthesis of Terminally Phosphorylated<scp>L</scp>-Sugars<i>via</i>Multienzymatic Cascade Reactions
作者:Virgil Hélaine、Rima Mahdi、G. V. Sudhir Babu、Véronique de Berardinis、Roland Wohlgemuth、Marielle Lemaire、Christine Guérard-Hélaine
DOI:10.1002/adsc.201500190
日期:2015.5.26
involved in a one‐pot multienzymatic procedure to obtain rare L‐sugars. Starting from simple achiral substrates such as glycolaldehyde and formaldehyde, L‐glyceraldehyde‐3‐phosphate (L‐G3P) was generated. When this latter compound was used as an FSA acceptor substrate along with four different donor compounds, four terminally phosphorylated L‐monosaccharides from C5 to C7 chain lengths were prepared in
We explored a collection of 2-deoxyribose-5-phosphate aldolases (DERAs) from biodiversity for their nucleophile substrate promiscuity. The DERAs were screened using as nucleophiles propanone, propanal, cyclobutanone, cyclopentanone, dihydroxyacetone, and glycolaldehyde with L-glyceraldehyde-3-phosphate as an electrophile in aldol addition. A DERA from Arthrobacter chlorophenolicus (DERAArthro) efficiently
Deoxyribose 5-phosphate aldolase as a catalyst in asymmetric aldol condensation
作者:Lihren Chen、David P. Dumas、Chi Huey Wong
DOI:10.1021/ja00028a050
日期:1992.1
This paper describes the substrate specificity and synthetic utility of deoxyribose-5-phosphate aldolase (DERA, EC 4.1.2.4). Eight donors and 20 acceptors have been tested as substrates. In addition to acetaldehyde, propanal, acetone, and fluoroacetone have been used to condense with a number of acceptor aldehydes. Thirteen aldol products have been prepared and characterized. A new stereogenic center with 3(S) configuration is formed when acetaldehyde, fluoroacetone, or acetone is used as a donor substrate. With propanal, two new stereogenic centers are formed with 2(R) and 3(S) configurations. The acceptor substrates have very little structural requirements. The 2-hydroxyaldehydes appear to react the fastest, and the D-isomers are better substrates than the L-isomers. The stereospecificity is absolute regardless of the chirality of 2-hydroxyaldehydes. The aldol reactions thus follow the Cram-Felkin mode of attack for D-substrates and anti-Cram-Felkin mode of attack for L-substrates.