How can I limit signal saturation when using the EnzChek Lysozyme Assay Kit (Cat. No. E22013)?
To limit signal saturation when using the EnzChek Lysozyme Assay Kit (Cat. No. E22013), try lowering the voltage (gain) on the PMT (photomultiplier tube). If you are still seeing signal saturation after lowering the voltage, try a shorter reaction time, and/or lower substrate concentration.
May other buffers be used for the EnzChek Lysozyme assay?
Yes. You may use other buffers that are compatible with the enzyme of interest. The buffer provided is optimal for use with chicken egg white lysozyme. If the buffer has a pH <6, adjust the pH to 7.5 to 8 prior to detection for optimal signal from the fluorescein. The emission of fluorescein drops off at pH <6.
Vogesella mureinivorans sp. nov., a peptidoglycan-degrading bacterium from lake water.
Authors:Jørgensen NO, Brandt KK, Nybroe O, Hansen M,
Journal:Int J Syst Evol Microbiol
PubMed ID:19946047
'A novel, non-pigmented, rod-shaped, Gram-negative strain was isolated from mesotrophic lake water in Zealand, Denmark. Phylogenetic analysis of the 16S rRNA gene sequence of the bacterium, designated strain 389(T), indicated that the strain belonged to the genus Vogesella and formed a monophyletic group with Vogesella perlucida DS-28(T) (99.1?% nucleotide similarity); ... More
Structure-function analysis of HsiF, a gp25-like component of the type VI secretion system, in Pseudomonas aeruginosa.
Authors:Lossi NS, Dajani R, Freemont P, Filloux A,
Journal:Microbiology
PubMed ID:21873404
'Bacterial pathogens use a range of protein secretion systems to colonize their host. One recent addition to this arsenal is the type VI secretion system (T6SS), which is found in many Gram-negative bacteria. The T6SS involves 12-15 components, including a ClpV-like AAA(+) ATPase. Moreover, the VgrG and Hcp components have ... More
Mechanisms of systemic vasodilation by lysozyme-c in septic shock.
In septic shock (SS), cardiovascular collapse is caused by the release of inflammatory mediators. We previously found that lysozyme-c (Lzm-S), released from leukocytes, contributed to systemic vasodilation in a canine model of SS. We then delineated the pathway by which this occurs in a canine carotid artery organ bath preparation ... More
Mutations of the Listeria monocytogenes peptidoglycan N-deacetylase and O-acetylase result in enhanced lysozyme sensitivity, bacteriolysis, and hyperinduction of innate immune pathways.
Authors:Rae CS, Geissler A, Adamson PC, Portnoy DA,
Journal:Infect Immun
PubMed ID:21768286
Listeria monocytogenes is a Gram-positive intracellular pathogen that is naturally resistant to lysozyme. Recently, it was shown that peptidoglycan modification by N-deacetylation or O-acetylation confers resistance to lysozyme in various Gram-positive bacteria, including L. monocytogenes. L. monocytogenes peptidoglycan is deacetylated by the action of N-acetylglucosamine deacetylase (Pgd) and acetylated by ... More
Alcohol use disorders affect antimicrobial proteins and anti-pneumococcal activity in epithelial lining fluid obtained via bronchoalveolar lavage.
Authors:Burnham EL, Gaydos J, Hess E, House R, Cooper J,
Journal:Alcohol Alcohol
PubMed ID:20729531
Our overall objective was to examine whether characteristics of epithelial lining fluid (ELF) from subjects with alcohol use disorders (AUDs) obtained via bronchoalveolar lavage (BAL) contribute to their predisposition to pneumococcal pneumonia. We sought to compare the anti-pneumococcal activity of acellular human BAL from subjects with AUDs to matched controls. ... More