Peptidoglycan Purification
CD BioGlyco's experienced researchers have generated numerous successful cases in the field of peptidoglycan purification and structural characterization. We have confidence to be your essential research assistant in the field of glycobiology.
The bacterial cell wall comprises peptidoglycan (PG), a large molecular network of sugar chains cross-linked by short peptides. The basic structure of PG contains a carbohydrate backbone with alternating units of N-acetylglucosamine (GlcNAc) and N-acetylmuramic acid, in which N-acetylmuramic acid residues are cross-linked with peptides. The glycan chains are cross-linked by short peptide bridges for a strong network structure, and their composition may vary depending on the type of bacteria.
The bacterial cell wall is very important for the cell growth and division process. Under the pressure of several atmospheres, the cell wall can maintain the mechanical integrity of cells. It gives the bacterial cell wall rigidity, protects bacteria from environmental damage, defines the shape of bacteria, and acts as an anchor for proteins and other polymers. The importance of peptidoglycan in bacterial physiology lies in its use as an antibiotic target, and promotes genetic, structural and cell biology research, so that it can be firmly assembled during growth and division. However, extensive research is still needed to fully characterize the detailed structure of peptidoglycan and the chemical composition of bacterial cell walls. Before performing detailed structural characterization, high-quality and highly selective purification of peptidoglycan is required.
Our services utilize established protocols and advanced analytical platforms to isolate high-purity microbial carbohydrates and accurately determine their structures. Core technologies include: advanced lysis and fractionation, combining mechanical, chemical, and enzymatic methods for efficient cell disruption with minimal degradation; specialized enzymatic digestion using enzymes like lysozyme or mutanolysin to break down complex polymers (e.g., peptidoglycan) into manageable subunits; and multi-stage purification, employing centrifugation, washing, chemical treatments, and chromatography to achieve exceptional purity by removing non-carbohydrate materials and separating individual carbohydrate fractions.
Our services are built upon a foundation of established protocols and cutting-edge analytical platforms, ensuring the isolation of high-purity microbial carbohydrates and the accurate elucidation of their structures. Our core technologies include:
We employ a combination of mechanical, chemical, and enzymatic lysis methods to efficiently disrupt bacterial cells and release cell wall components while minimizing sample degradation. For example, our protocols utilize strong detergents like SDS in conjunction with mechanical bead beating to achieve complete cell disruption, followed by extensive washing to remove all traces of the detergent.
To prepare peptidoglycan for structural analysis, we use specific enzymatic digestion to break down the large polymer into its smaller, more manageable muropeptide subunits. This process involves the use of muramidases, such as lysozyme or mutanolysin, which hydrolyze the key NAM-β-1,4-NAG linkages along the peptidoglycan backbone, generating soluble disaccharide-containing muropeptides.
Our downstream process incorporates multi-stage purification to isolate the target microbial carbohydrates with exceptional purity. This involves a series of centrifugation, washing, and chemical treatments (e.g., acetone) to remove non-carbohydrate materials, followed by advanced chromatographic techniques to separate individual carbohydrate fractions.
DOI.: 10.2183/pjab.86.322
Journal: Proceedings of the Japan Academy, Series B
IF: 4.4
Published: 2010
Results: This seminal review details how chemical synthesis enabled the identification of minimal immunostimulatory structures within bacterial cell envelope components. Researchers synthesized defined partial structures of peptidoglycan and lipopolysaccharide, revealing that N-acetylmuramyl-L-alanyl-D-isoglutamine (MDP) is the essential motif in peptidoglycan recognized by the cytoplasmic receptor Nod2, triggering innate immune responses. Similarly, synthetic studies confirmed lipid A as the endotoxic core of lipopolysaccharide, with its precise structure (a β(1→6)-linked glucosamine disaccharide bearing phosphate groups and specific acyl chains) dictating its potent activation of TLR4/MD-2. Homogeneous synthetic lipid A and its analogues unequivocally demonstrated that this glycolipid alone reproduces all endotoxic activities, facilitating mechanistic studies of TLR4 signaling. These chemistry-driven breakthroughs established that small, conserved molecular patterns within complex bacterial glycoconjugates are specifically detected by host receptors (e.g., Nod1, Nod2, TLR4) to initiate innate immunity.
Following the precise isolation of peptidoglycan, exploring the intricate landscape of carbohydrate metabolism offers profound insights into broader biological processes and functions. Our comprehensive Carbohydrate Metabolism Analysis service is designed to decode these complex pathways, featuring three specialized tiers:
Our experienced researchers can provide customers with high-quality peptidoglycan purification services to facilitate subsequent peptidoglycan structure analysis experiments. CD BioGlyco will continue to improve our standards to meet customers' glycobiology research needs in a comprehensive and systematic way.
Customers can contact our employees directly and we will respond promptly. If you are interested in our services, please contact us for more detailed information.
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