Murein Hydrolases
Murein Hydrolases - Related Videos
01:22
Lysosomal Hydrolases
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2023
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
10:21
Expression, Purification, Crystallization, and Enzyme Assays of Fumarylacetoacetate Hydrolase Domain-Containing Proteins
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Cited by 6 •
2019
Expression and purification of fumarylacetoacetate hydrolase domain-containing proteins is described with examples (expression in E. coli, FPLC). Purified proteins are used for crystallization and antibody production and employed for enzyme assays. Selected photometric assays are presented to display the multi-functionality of FAHD1 as oxaloacetate decarboxylase and acylpyruvate hydrolase.
04:09
An Immunofluorescence Assay to Detect Alpha-Synuclein Aggregates in a Skin Biopsy Section
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2025
This video demonstrates an immunofluorescence assay to detect neurodegenerative disease-specific alpha-synuclein aggregates on skin biopsy sections. Free-floating immunostaining is employed to fluorescently label the carboxyl-terminal hydrolase and the alpha-synuclein aggregates in the dermal neurons. Under a confocal microscope, cells with fluorescence from both antibodies indicate the presence of alpha-synuclein aggregates in the dermal neurons.
04:46
Resorption Pit Assay: An In Vitro Technique to Quantify Calcium Resorption Activity of Mature Osteoclasts using Calcium Phosphate-Coated Culture Plates
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2025
In this video, we describe an in vitro osteoclastic resorption assay on calcium phosphate-coated cell culture plates cultured with human peripheral blood mononuclear cell-derived osteoclasts. The osteoclasts form a characteristic actin ring on the calcium phosphate-coated matrix of the cell culture plate and degrade the matrix within the actin ring region to release calcium and phosphate ions, resulting in the formation of distinct resorption pits within the degraded matrix.
10:09
Tensile Strength of Resorbable Biomaterials
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2023
Source: Peiman Shahbeigi-Roodposhti and Sina Shahbazmohamadi, Biomedical Engineering Department, University of Connecticut, Storrs, Connecticut For over 4000 years, sutures have been used as a medical intervention. The earliest records indicate linen was the biomaterial of choice. Catgut, which is still in use today, was reportedly used to treat gladiators around 150 AD. Today, there are numerous materials being used for sutures. Sutures are classified by their composition (natural or...
FAQs
The key distinction is the bond each activity attacks. Muramidase and other glycosidase activities act on the glycan backbone, whereas amidases and endopeptidases target peptide-linked portions or cross-links. This division matters because cleavage at different structural locations can produce different patterns of wall weakening, allowing researchers to relate enzyme specificity to bacterial shape, growth, division, or lysis.
Substrate preference determines which part of the wall architecture an enzyme can modify. Activity directed toward the glycan framework differs from activity that disrupts peptide cross-links, so each may influence wall remodeling in a different way. Comparing these activities helps researchers connect molecular cleavage with the coordinated changes required during bacterial growth and cell division.
Phage-encoded hydrolases operate in a different biological context from bacterial remodeling enzymes. Their wall-destabilizing activity supports the release of newly produced virions, so the relevant outcome is host-cell lysis rather than controlled maintenance of bacterial shape. This contrast allows researchers to compare endogenous cell-wall dynamics with virus-associated disruption of the bacterial envelope.
Researchers can relate cleavage activity to both its structural substrate and biological context. They may distinguish glycan-backbone activity from peptide-cross-link activity, then ask whether the process accompanies bacterial growth and division or phage-associated wall weakening. This framework connects enzyme behavior with larger outcomes, such as morphogenesis-related remodeling or host-cell lysis.
Their ability to weaken the peptidoglycan wall makes murein hydrolases relevant to research on antibiotics and other antibacterial agents. Investigators can use knowledge of cleavage specificity to examine how distinct wall structures might be altered or disrupted. The broader value lies in connecting a molecular activity with changes to the mechanically important bacterial wall.
Murein hydrolases support controlled cell-disruption research because their activities are directed at defined structural features of the bacterial wall. Comparing muramidase, glycosidase, amidase, and endopeptidase activities helps relate enzyme class to the feature affected. This information also supports investigations of antibacterial agents, phage therapy, and approaches designed to weaken bacterial cells deliberately.