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Filename: controllers/Detail.php
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Filename: controllers/Detail.php
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File: /var/www/html/application/controllers/Detail.php
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File: /var/www/html/index.php
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The bloodstream represents a hostile environment that bacteria must overcome to cause bacteraemia. To understand how the major human pathogen manages this we have utilised a functional genomics approach to identify a number of new loci that affect the ability of the bacteria to survive exposure to serum, the critical first step in the development of bacteraemia. The expression of one of these genes, was found to be induced upon exposure to serum, and we show that it is involved in the elaboration of a critical virulence factor, the wall teichoic acids (WTA), within the cell envelope. The activity of the TcaA protein alters the sensitivity of the bacteria to cell wall attacking agents, including antimicrobial peptides, human defence fatty acids, and several antibiotics. This protein also affects the autolytic activity and lysostaphin sensitivity of the bacteria, suggesting that in addition to changing WTA abundance in the cell envelope, it also plays a role in peptidoglycan crosslinking. With TcaA rendering the bacteria more susceptible to serum killing, while simultaneously increasing the abundance of WTA in the cell envelope, it was unclear what effect this protein may have during infection. To explore this, we examined human data and performed murine experimental infections. Collectively, our data suggests that whilst mutations in are selected for during bacteraemia, this protein positively contributes to the virulence of through its involvement in altering the cell wall architecture of the bacteria, a process that appears to play a key role in the development of bacteraemia.
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http://dx.doi.org/10.1101/2023.02.23.529713 | DOI Listing |
J Agric Food Chem
December 2024
Zhejiang Key Laboratory of Intelligent Food Logistic and Processing, College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang 315100, China.
Texture is an important quality index reflecting a series of sensory evaluations of fruit, and softening is the main texture change of most postharvest fruit. Persimmon fruit () shows a pattern of decreasing firmness after harvest, leading to a short duration of sale and excessive waste. We found that the treatment with gibberellin (GA) could effectively inhibit the postharvest softening of persimmon fruit, but the underlying mechanism is unclear.
View Article and Find Full Text PDFJ Clin Invest
December 2024
Department of Molecular Immunology, Research Institute for Microbial Diseas, Osaka University, Suita, Japan.
Mycobacterium tuberculosis causes human tuberculosis. As mycobacteria are protected by thick lipid cell wall, humans have developed immune responses against diverse mycobacterial lipids. Most of these immunostimulatory lipids are known as adjuvants acting through innate immune receptors, such as C-type lectin receptors.
View Article and Find Full Text PDFAntonie Van Leeuwenhoek
December 2024
All-Russian Collection of Microorganisms (VKM), Pushchino Scientific Center for Biological Research, Russian Academy of Sciences, Pushchino, 142290, Russia.
Four salt-tolerant and aromatics degrading strains used in this study were isolated from polluted technogenic soil on the territory of the Verkhnekamsk potash deposit (Russia). The strains were aerobic, Gram-stain-positive, non-motile, non-endospore-forming irregular rods, exhibiting a marked rod-coccus growth cycle. They contained lysine-based peptidoglycan, teichulosonic acid and poly(glycosyl phosphate) polymers in the cell walls.
View Article and Find Full Text PDFAntonie Van Leeuwenhoek
December 2024
GIPhy - Genome Informatics and Phylogenetics, Biological Resource Center of Institut Pasteur, Institut Pasteur, Université de Paris, 75015, Paris, France.
A Gram-staining-positive, aerobic bacterium, designated strain JJ-181, was isolated from the root surface of soybean. Based on the 16S rRNA gene sequence similarities, strain JJ-181 was grouped into the genus Cohnella, most closely related to Cohnella hashimotonis F6_2S_P_1 (98.85%) and C.
View Article and Find Full Text PDFCarbohydr Res
December 2024
Laboratory of Glycoconjugate Chemistry, N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991, Moscow, Russian Federation. Electronic address:
The members of a widespread Aspergillus fungi genus cause various diseases including the invasive aspergillosis with high morbidity and mortality rates, especially for immunosuppressed patients. One of the main carbohydrate structures on the surface of their cell wall is the galactomannan (GM) which is used in diagnostic kits for the detection of specific types of aspergillosis. However, limited specificity of currently available test systems urges the need for their further improvement.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!