Multienzyme Cascade Bioreactor for a 10 min Digestion of Genomic DNA into Single Nucleosides and Quantitative Detection of Structural DNA Modifications in Cellular Genomic DNA.
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Multienzyme Cascade Bioreactor for a 10 min Digestion of Genomic DNA into Single Nucleosides and Quantitative Detection of Structural DNA Modifications in Cellular Genomic DNA.
Identification and quantification of chemical modification of DNA provides important information about changes in genomic DNA, for example, epigenetic modifications and abnormal DNA lesions. In this layer, which is needed to digest the genomic DNA strands into a single nucleoside, facilitating mass spectrometry analysis. However, the rapid digestion of DNA as supramacromolecule of several million Dalton (molecular weight) into a single nucleoside remains very challenging.
Here, we constructed a bioreactor Benzonase move capillaries and subsequently immobilized tandem coupled with snake venom phosphodiesterase and alkaline phosphatase capillary bioreactor to form a novel three-enzyme cascade bioreactor (BenzoSAC bioreactor). In this construction, the enzyme selected moving to synthetic porous monolithic silica capillary.
With tailor-made porous structure and high immobilized capacity and high-level Benzonase digestion, genomic DNA of> 99.5% can be digested into a single nucleoside within just 10 minutes when passing through the bioreactor BenzoSAC by the injection pump. In contrast, traditional digestion requires 8-24 hours. With offline clutch benzoSAC bioreactor with chromatography-tandem mass spectrometry liquid, we detected a 5-hydroxymethylcytosine, the main oxidation product of epigenetically importance of 5-methylcytosine in genomic DNA isolated from cancer stairs (T24) cells. The BenzoSAC bioreactor newly synthesized and proposed mass spectrometry detection promising for the rapid identification and analysis of structural modifications in DNA.
Viruses that infect thermophilic Archaea that is unique in both structure and genetics. Lemon-shaped fuselloviruses that infects members of the order Sulfolobales, grows optimally at 80 ° C and pH 3-are some viruses that most ubiquitous and best studied of Archaea thermoacidophilic. Nonetheless, there is still much to be learned about this virus. In order to investigate the evolution of fusellovirus, we have isolated and characterized a new fusellovirus, Sulfolobus spindle-shaped virus 10 (previously SSV-L1). Comparative genomic analysis highlights the significant similarities with both SSV8 and SSV9, as well as the conservation of promoter elements in Fuselloviridae.
Multienzyme Cascade Bioreactor for a 10 min Digestion of Genomic DNA into Single Nucleosides and Quantitative Detection of Structural DNA Modifications in Cellular Genomic DNA.
Comparison of genomic and transcriptome analysis of Lactobacillus rhamnosus ATCC 11443 and mutant strains SCT- 10 – 10 -60 to increase the production capacity of L-lactic acid.
The mechanism for the production of L-lactic acid of high remains unclear in many bacteria. Lactobacillus rhamnosus-10-10-60 SCT previously obtained from L. rhamnosus ATCC 11443 by mutagenesis and showed increased production of L-lactic acid. In this study, genome-10-10-60 SCT strain and ATCC 11443 were sequenced.
The second genome is a circular chromosome, 2.99 Mb long with a GC content of about 46.8%. Eight split genes identified in strain-10-10-60 SCT, including two LytR family of transcriptional regulators, two Rex redox-sensing transcriptional repressor, and four ABC transporters. In total, 60 genes were significantly up-regulated (log2fold-change ≥ 2) and 39 significantly down-regulated genes (log2fold-change ≤ – 2) were identified by transcriptome comparison between SCT-10-10-60 strain and ATCC 11443. KEGG pathway enrichment analysis revealed that “pyruvate metabolism” significantly different (P <0.05) between the two strains.
Gen split and differentially expressed genes involved in “pyruvate metabolism” pathway may be responsible for increasing the production of L-lactic acid by SCT-10-10-60. Genome and transcriptome sequencing information and comparison of SCT-10-10-60 with ATCC 11443 gives an insight into the L-lactic acid anabolism and references to increase the production of L-lactic acid using genetic engineering.
