AI Article Synopsis
- Recent research highlights the potential of functional sugars like d-mannose for health benefits and industrial applications, driving interest in efficient production methods.
- A gene for d-mannose isomerase (d-LIase) was cloned from Caldanaerobius polysaccharolyticus and expressed in E. coli, revealing optimal activity at 65°C and pH 6.5.
- Experimental results showed successful conversion of d-fructose to d-mannose, indicating that d-LIase is a promising candidate for sustainable d-mannose production.
Article Abstract
Recently, functional sugars, such as d-mannose, have attracted considerable attention due to their excellent physiological benefits for human health and wide applications in food and pharmaceutical industries. Therefore, d-mannose production using a sugar isomerase such as d-lyxose isomerase (d-LIase) has emerged as a research hotspot owing to its advantages over plant extraction and chemical synthesis methods. In this study, a putative d-LIase gene from Caldanaerobius polysaccharolyticus was cloned and expressed in Escherichia coli. Then, a biochemical characterization of the recombinant d-LIase was carried out and its potential use in d-mannose production also assessed. Results showed that d-LIase exhibited its maximum activity under these optimal conditions: temperature of 65 °C, a pH of 6.5, and the Mn metal ion. The d-LIase was active at pH 6.0-8.0; it was also quite thermostable up to 60 °C and approximately 85 % of its maximum activity was retained after incubating for 4 h. Further, our Nano-DSC analysis determined that its melting temperature (T) was 70.74 °C. Using 100, 300, and 500 g L of d-fructose as substrate, 25.6, 74.4, and 115 g L of d-mannose were produced respectively, corresponding to a conversion rate of 25.6 %, 24.8 %, and 23.0 % under optimal conditions. Taken together, our results provide evidence for a promising candidate d-LIase for producing d-mannose directly from d-fructose.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.enzmictec.2020.109553 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Virulence factor discovery identifies associations between the Fic gene family and Fap2 fusobacteria in colorectal cancer microbiomes.
mBio
January 2025
Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA.
is a bacterium associated with colorectal cancer (CRC) tumorigenesis, progression, and metastasis. Fap2 is a fusobacteria-specific outer membrane galactose-binding lectin that mediates adherence to and invasion of CRC tumors. Advances in omics analyses provide an opportunity to profile and identify microbial genomic features that correlate with the cancer-associated bacterial virulence factor Fap2.
View Article and Find Full Text PDFZinc Chloride-Doped g-CN Microtubes for Enhanced Photocatalytic Degradation of Tetracycline Hydrochloride.
Langmuir
January 2025
College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P.R. China.
Morphology regulation and element doping are effective means to improving the photocatalytic performance of graphite-phase carbon nitride (g-CN). In this article, using melamine and zinc chloride as raw materials, a novel kind of Zn/Cl-doped hollow microtubular g-CN (Zn-HT-CN) by a hydrothermal method was developed. The structure and morphology of Zn-HT-CN and reference samples were characterized by X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), etc.
View Article and Find Full Text PDFCharacterization of a chitinase from Trichinella spiralis and its immunomodulatory effects on allergic airway inflammation in mice.
Parasit Vectors
January 2025
School of Basic Medicine Science, Fujian Province, Putian University, Key Laboratory of Translational Tumor Medicine in , Putian City, 351100, Fujian Province, China.
Background: A fundamental tenet of the hygiene theory is the inverse association between helminth infections and the emergence of immune-mediated diseases. Research has been done to clarify the processes by which helminth-derived molecules can inhibit immunological disorders. This study aimed to evaluate the ability of Trichinella spiralis chitinase (Ts-chit) to ameliorate the symptoms of allergic airway inflammation.
View Article and Find Full Text PDFGenome Analysis of Coxsackievirus A4 Identified from Herpangina Children in Northern China.
Curr Microbiol
January 2025
Women and Children's Health Care Hospital of Linyi, No.1 Qinghe South Road, Luozhuang District, Linyi, Shandong, China.
Sporadic epidemics of coxsackievirus A4 (CVA4) have been reported worldwide. However, the lack of the whole genome sequence has restricted the study of the gene characterization and evolution of CVA4. In this study, four whole genome sequences and 17 VP1 sequences of CVA4 identified from Linyi, northern China, in summer 2024 were used for genetic characterization and phylogenetic analysis.
View Article and Find Full Text PDFAssays of Platelet SNARE-actin Interactions.
Methods Mol Biol
January 2025
Division of Hemostasis and Thrombosis, Department of Medicine, BIDMC, Harvard Medical School, Boston, MA, USA.
The actin cytoskeleton serves an important, but poorly characterized, role in controlling granule exocytosis. The dynamic nature of actin remodeling allows it to act both as a barrier to prevent indiscriminate granule release and as a facilitator of membrane fusion. In its capacity to promote exocytosis, filamentous actin binds to components of the exocytotic machinery through actin binding proteins, but also through direct interactions with SNAREs.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!