We report a new two-step procedure that uses inexpensive rac-glycidol to obtain valuable dihydroxyacetonephosphate (DHAP), a building block for the synthesis of monosaccharide analogues.
Biosynthesis of archaebacterial ether lipids. Formation of ether linkages by prenyltransferases
作者:Donglu Zhang、C. Dale Poulter
DOI:10.1021/ja00057a008
日期:1993.2
Biosynthesis of (R)-2,3-di-O-phytanylglycerol (1), the core lipid of the membranes in the strict anaerobe Methanobacterium thermoautotrophicum, was studied in cell-free preparation. Two prenyltransferase activities were separated by ultracentrifugation. The cytosolic fraction contained activity for (S)-3-O-geranylgeranylglyceryl phosphate synthase (CGGP synthase), which catalyzes alkylation of (S)-glyceryl
Identification of<i>sn</i>-Glycerol-1-phosphate Dehydrogenase Activity from Genomic Information on a Hyperthermophilic Archaeon,<i>Sulfolobus tokodaii</i>Strain 7
sn-Glycerol-1-phosphate dehydrogenase is responsible for the formation of sn-glycerol-1-phosphate, the backbone of membrane phospholipids of Archaea. This activity had never been detected in cell-free extract of Sulfolobus sp. Here we report the detection of this activity on the thermostable ST0344 protein of Sulfolobus tokodaii expressed in Escherichia coli, which was predicted from genomic information on S. tokodaii. This is another line of evidence for the general mechanism of sn-glycerol-1-phosphate formation by the enzyme.
Synthesis and hydrolytic stability of cyclic phosphatidic acids: implications for synthetic- and proto-cell studies
作者:Veronica Egas Ortuno、Sunil Pulletikurti、Kollery S. Veena、Ramanarayanan Krishnamurthy
DOI:10.1039/d2cc00292b
日期:——
Cyclic phosphatidic acids (cPAs) are bioactive compounds with therapuetic potential, but are in short supply. We describe a robust synthesis of cPAs employing an efficient cyclophosphorylation procedure and report on their hydrolytic properties – which should facilitate the study of their biological properties and as plausible proto- and synthetic-cell components.
One-pot enzymatic reaction sequence for the syntheses of d-glyceraldehyde 3-phosphate and l-glycerol 3-phosphate
作者:Getachew S. Molla、Roland Wohlgemuth、Andreas Liese
DOI:10.1016/j.molcatb.2015.12.004
日期:2016.2
A one-pot enzymatic reaction sequence for the synthesis of optically pure D-glyceraldehyde 3-phosphate (D-GAP) and L-glycerol 3-phosphate (sn-G3P) was designed using fructose-bisphosphate aldolase from rabbit muscle (RAMA), sn-glycerol 3-phosphate dehydrogenase (sn-G3PDH) and formate dehydrogenase from Candida boidinii (FDH). The reaction sequence significantly improves the aldol cleavage of D-fructose 1,6-bisphosphate (D-F16BP) catalyzed by RAMA and yields 100% conversion of D-F16BP by overcoming thermodynamic limitation. The degradation kinetics of D-GAP under reaction conditions was investigated and a reaction kinetics model defining the entire cascade was developed. Validation of the model shows 98.5% correlation between experimental data and numerically simulated data matrices. The evaluation of different types of reactor was performed by combining the reaction kinetics model, mass balances and kinetics of the non-enzymatic degradation of D-GAP. Batch-wise operation in a stirred tank reactor (STR) is the most convenient procedure for the one-pot enzymatic syntheses of D-GAP and sn-G3P. The separation of the two products D-GAP and sn-G3P has been achieved using polyethylenimine (PEI)-cellulose TLC. (C) 2015 Elsevier B.V. All rights reserved.