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Total synthesis and antitumor activity of ZK-EPO: the first fully synthetic epothilone in clinical development.
Ulrich Klar et al.
Angewandte Chemie (International ed. in English), 45(47), 7942-7948 (2006-09-29)
Zhiqiang Liu et al.
Journal of agricultural and food chemistry, 54(16), 5823-5830 (2006-08-03)
D-Pantonohydrolase has attracted increasing attention as a biocatalyst for stereospecific production of D-pantoic acid. The Fusarium moniliforme D-pantonohydrolase was selected for directed evolution through error-prone Polymerase Chain Reaction (PCR) combined with DNA shuffling for improved activity and pH stability using
M Kataoka et al.
Applied microbiology and biotechnology, 64(3), 359-366 (2003-11-01)
The genes encoding two conjugated polyketone reductases (CPR-C1, CPR-C2) of Candida parapsilosis IFO 0708 were cloned and sequenced. The genes encoded a total of 304 and 307 amino acid residues for CPR-C1 and CPR-C2, respectively. The deduced amino acid sequences
Michael-Rock Goldsmith et al.
Journal of the American Chemical Society, 125(51), 15696-15697 (2003-12-18)
Dilute solutions of (R)-(-)-pantolactone in CCl4 were studied by polarimetry in conjunction with theoretical calculations of [alpha]D. Our data demonstrate that the self-association of a chiral solute results in a change in [alpha]D that can be accounted for by the
A D Keefe et al.
Nature, 373(6516), 683-685 (1995-02-23)
The involvement of coenzyme A in many enzyme reactions suggests that it acted in this capacity very early in the development of life on Earth. Particularly relevant in this regard is its role in the activation of amino acids and
K Nakamura et al.
Bioorganic & medicinal chemistry, 2(6), 433-437 (1994-06-01)
Addition of beta-cyclodextrin improves enantioselectivity dramatically in the reduction of ketopantolactone mediated by baker's yeast. It has been found that the selectivity increases with the decrease in concentration of ketopantolactone in bulk solvent, and beta-cyclodextrin controls its effective concentration. The
Morris Markert et al.
Journal of the American Chemical Society, 131(46), 16642-16643 (2009-11-03)
A histidine-catalyzed asymmetric direct cross-aldol reaction of enolizable aldehydes is described. In contrast to proline, histidine is able to clearly differentiate the reactivity of various aldehydes. In addition, this approach provides access to syn-configured beta-hydroxyaldehydes. Thus, by application of this
Dayong Si et al.
Applied microbiology and biotechnology, 95(2), 431-440 (2012-03-09)
The 1,2-propanediol (1,2-PD) inducible membrane-bound L-pantoyl lactone (L-PL) dehydrogenase (LPLDH) has been isolated from Rhodococcus erythropolis AKU2103 (Kataoka et al. in Eur J Biochem 204:799, 1992). Based on the N-terminal amino acid sequence of LPLDH and the highly conserved amino
Cheryl N Miller et al.
Journal of bacteriology, 195(5), 965-976 (2012-12-18)
Pantothenate, commonly referred to as vitamin B(5), is an essential molecule in the metabolism of living organisms and forms the core of coenzyme A. Unlike humans, some bacteria and plants are capable of de novo biosynthesis of pantothenate, making this
Zhi-Hui Peng et al.
Organic letters, 4(17), 2945-2948 (2002-08-17)
[reaction: see text] The [3 + 2] annulation reaction of allylsilane 1 with an alpha-keto ester provided the highly substituted tetrahydrofuran 2 as a single diastereomer in high yield. The synthesis of (+/-)-5-epi-citreoviral and (+/-)-citreoviral has been accomplished with this
R K Airas
The Biochemical journal, 250(2), 447-451 (1988-03-01)
A pseudomonad was separated having a pantothenase that produced beta-alanine and pantoic acid. The pantothenase from an old strain, Pseudomonas fluorescens UK-1, was shown to produce beta-alanine and pantoyl lactone. The pantoic acid-producing pantothenase was characterized and compared with the
Dayong Si et al.
Applied and environmental microbiology, 78(22), 7923-7930 (2012-09-04)
The L-pantoyl lactone (L-PL) dehydrogenase (LPLDH) gene (lpldh) has been cloned from Rhodococcus erythropolis AKU2103, and addition of 1,2-propanediol (1,2-PD) was shown to be required for lpldh expression in this strain. In this study, based on an exploration of the
Optical resolution of pantolactone by a novel fungal enzyme, lactonohydrolase.
S Shimizu et al.
Annals of the New York Academy of Sciences, 799, 650-658 (1996-10-12)
A G Moĭseenok et al.
Voprosy meditsinskoi khimii, 30(1), 126-128 (1984-01-01)
A gas chromatographic procedure is described for quantitative estimation of alpha-hydroxy-beta 1 beta-dimethyl-gamma-butyrolactone (pantolactone). The chromatography was carried out using "LHM-8MD" apparatus equipped with a flame ionization detector. Columns with chromaton N-AW modified by 5% silicone XE-60 were used, helium
S L Miller et al.
Journal of molecular evolution, 36(4), 308-314 (1993-04-01)
Pantoic acid can by synthesized in good prebiotic yield from isobutyraldehyde or alpha-ketoisovaleric acid + H2CO + HCN. Isobutyraldehyde is the Strecker precursor to valine and alpha-ketoisovaleric acid is the valine transamination product. Mg2+ and Ca2+ as well as several
A D Keefe et al.
Origins of life and evolution of the biosphere : the journal of the International Society for the Study of the Origin of Life, 26(1), 15-25 (1996-02-01)
In view of the importance of a prebiotic source of high energy phosphates, we have investigated a number of potentially prebiotic processes to produce condensed phosphates from orthophosphate and cyclic trimetaphosphate from tripolyphosphate. The reagents investigated include polymerizing nitriles, acid
Atul K Hajare et al.
The Journal of organic chemistry, 76(3), 963-966 (2011-01-05)
An efficient synthesis of potent molluscicidal agent cyanolide A, a glycosidic 16-membered macrolide, starting from D-(-)-pantolactone is reported. Highly stereoselective aldol, oxa-Michael addition, and Yamaguchi macrolactonization are the key steps in the present synthesis.
J Ogawa et al.
Trends in biotechnology, 17(1), 13-21 (1999-03-31)
Enzymes have applications in many fields, including organic synthesis, clinical analysis, pharmaceuticals, detergents, food production and fermentation. The application of enzymes to organic synthesis is currently attracting more and more attention. The discovery of new microbial enzymes through extensive and
Bing Chen et al.
Applied biochemistry and biotechnology, 162(3), 744-756 (2009-10-31)
The levo-lactonase gene of Fusarium proliferatum ECU2002 (EC3.1.1.25) was cloned and expressed in Escherichia coli JM109 (DE3) for biocatalytic resolution of industrially important chiral lactones, including DL-pantoyl lactone which was a key precursor to calcium D-pantothenate. By increasing the biomass
Keiji Sakamoto et al.
Journal of biotechnology, 118(1), 99-106 (2005-06-07)
We developed an enzymatic resolution system for DL-pantoyl lactone that uses immobilized mycelia of Fusarium oxysporum, which produce a lactone-hydrolyzing enzyme (lactonase). The lactonase catalyzes the stereospecific hydrolysis of D-pantoyl lactone. One hundred eighty repeated batch reactions (total reaction time
Separation and determination of the enantiomers of pantolactone by gas-liquid chromatography.
A Takasu et al.
Journal of chromatography, 389(1), 251-255 (1987-02-27)
Pelayo Camps et al.
The Journal of organic chemistry, 73(17), 6657-6665 (2008-07-30)
A series of novel N,O-psiconucleosides has been prepared in both enantiomeric forms by resolution of an advanced racemic synthetic intermediate using (R)-N-phenylpantolactam as a chiral resolution agent. The absolute configuration of all of these compounds has been unequivocally established by
Bala Rathinasabapathi et al.
Annals of botany, 95(6), 1033-1037 (2005-03-16)
All plants synthesize pantothenate but its synthesis and regulation are not well understood. The aim of this work is to study the effect of exogenous supply of precursor compounds on pantothenate levels in leaves. Precursor compounds were supplied in solution
Manfred T Reetz et al.
Chemical communications (Cambridge, England), (13)(13), 1428-1429 (2002-07-20)
The esterase-catalyzed enantioselective hydrolysis of the fluoroacetate of pantolactone leads to fluoroacetic acid, a toxic compound which inhibits the growth of esterase-producing yeast; this forms the basis of an ee-assay.
Paul R Blakemore et al.
The Journal of organic chemistry, 70(14), 5449-5460 (2005-07-02)
[structure: see text] Two approaches to the synthesis of the aglycon 120 of polycavernoside A (1) were developed, only one of which was completed. The successful "second-generation" route assembled the aglycon seco acids 102 and 106 via Nozaki-Hiyama-Kishi coupling of
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