Screening of some vegetables for the biotransformation of bicyclo[3.3.1]nonane-2,6-diol diacetate

Vegetables as biocatalysts were screened for the stereoselective biotransformation of racemic bicyclo[3.3.1]nonane-2,6-diol diacetate. The best results were obtained using the roots of carrot (Daucus carota) and parsnip (Pastinaca sativa) and the rootstocks of ginger (Zingiber officinale). During the biotransformation of racemic bicyclo[3.3.1]nonane-2,6-diol diacetate the enzymatic hydrolysis took place. Under different reaction conditions, i.e. the reaction temperature and time, and using different plant material as biocatalyst, (1R,2R,5R,6R)-(+)-bicyclo[3.3.1]nonane-2,6-diol monoacetate or (1S,2S,5S,6S)-(-)-bicyclo[3.3.1]nonane-2,6-diol monoacetate were obtained as reaction products. (–)- Enantiomer with the optical purity of 29.3% was obtained at 25°C using parsnip as biocatalyst for 2 days and (+)- enantiomer with the optical purity of 44.1% was obtained at 30°C using carrot for 3 days

An Optimization Procedure for Preparing Aqueous CAR/HP-CD Aggregate Dispersions

β-Carotene is a very important molecule for human health. It finds a large application in the food industry, especially for the development of functional foods and dietary supplements. However, β-carotene is an unstable compound and is sensitive to light, temperature, and oxygen. To overcome those limitations, various delivery systems were developed. The inclusion of β-carotene by cyclodextrin aggregates is attractive due to non-toxicity, low hygroscopicity, stability, and the inexpensiveness of cyclodextrins. In this study, β-carotene/2-hydroxypropyl-β-cyclodextrin aggregates were prepared based on the procedure of the addition of β-carotene in an organic solvent to the hot water dispersion of 2-hydroxypropyl-β-cyclodextrin and the following instant evaporation of the organic solvent. The best conditions for the aggregate preparation were found to be as follows: 25% concentration of 2-hydroxypropyl-β-cyclodextrin in water, 65 °C temperature, and acetone for β-carotene dissolution. The efficiency of entrapping was equal to 88%. The procedure is attractive due to the short time of the aggregate preparation

Association of ScV-LA virus with host protein metabolism determined by proteomics analysis and cognate RNA sequencing

Saccharomyces yeasts are highly dispersed in the environment and microbiota of higher organisms. The yeast killing phenotype, encoded by the viral system, was discovered to be a significant property for host survival. Minor alterations in transcription patterns underpin the reciprocal relationship between LA and M viruses and their hosts, suggesting the fine-tuning of the transcriptional landscape. To uncover the principal targets of both viruses, we performed proteomics analysis of virus-enriched subsets of host proteins in virus type-specific manner. The essential pathways of protein metabolism–from biosynthesis and folding to degradation–were found substantially enriched in virus-linked subsets. The fractionation of viruses allowed separation of virus-linked host RNAs, investigated by high-content RNA sequencing. Ribosomal RNA was found to be inherently associated with LA-lus virus, along with other RNAs essential for ribosome biogenesis. This study provides a unique portrayal of yeast virions through the characterization of the associated proteome and cognate RNAs, and offers a background for understanding ScV-LA viral infection persistency