Description

• Glucoside detergents are a class of non-ionic detergents commonly used in biochemical and biophysical research
• These detergents are derived from glucose and possess unique properties that make them suitable for various applications
• Glucoside detergents are known for their mildness, biocompatibility, and ability to solubilize and stabilize a wide range of biomolecules, including membrane proteins
• Glucoside detergents are also compatible with many downstream applications, such as protein purification, crystallization, and structural studies
• Features of glucoside detergents • Gentle on proteins, minimizing denaturation • Non-ionic nature—reduces electrostatic interactions • Low critical micelle concentration (CMC) • High-purity with low UV absorptivity Overall, glucoside detergents are versatile and can be used in various experimental techniques, including protein purification, crystallization, and structural biology studies
• They are compatible with a wide range of biomolecules and can be employed in both membrane and soluble protein research
• With their gentle nature and versatile performance, glucoside detergents have become valuable tools in the field of biochemical research
• Octyl-beta-Glucoside Octyl-beta-Glucoside (OG) is a low molecular weight, non-ionic detergent with an octyl chain attached to the glucose moiety that has been widely used for membrane protein solubilization
• OG is generally more soluble in aqueous solutions and forms clear and stable solutions at higher concentrations
• OG typically forms larger micelles compared to OTG
• The larger micelles of OG can be advantageous for certain applications, such as protein purification or structural studies, as they provide better solubility and reduced interference during downstream processes
• Properties of OG • Alternative names: octyl-beta-glucopyranoside, octyl-beta-D-glucopyranoside • Molecular weight: 292.37 g • Micelle molecular weight: 8000 g • Critical micelle concentration (CMC): 23 to 25 mM (0.6716 to 0.7300%, w/v) • Aggregation number: 27 • Cloud point: >100°C • Optically clear: low absorbance at 280 nm Octylthio Glucoside Octylthio Glucoside (OTG) is a low molecular weight, nonionic detergent that is effective for cell lysis and nondenaturing protein solubilization
• It is resistant to beta-D-glucoside glucohydrolase degradation because the thioether group present in OTG provides protection against enzymatic hydrolysis
• As a result, OTG can remain stable in the presence of beta-D-glucoside glucohydrolase enzymes, making it useful in applications where enzymatic stability is desired
• However, it is important to note that the specific stability of OTG can still be influenced by factors such as enzyme concentration, reaction conditions, and the specific enzymes present
• Properties of OTG • Chemical name: n-octyl-β-D-thioglucopyranoside • Molecular weight: 44 g • CMC: 9 mM (0.2772%, w/v) • Cloud point: >100°C • Optically clear: low absorbance at 280 nm n-Nonyl-β-D-glucoside n-Nonyl-β-D-glucoside (NG) has a longer alkyl chain (nonyl) compared to other glucosides
• The longer alkyl chain in n-Nonyl-β-D-glucoside can confer higher hydrophobicity and potentially stronger detergent properties
• This can enhance the solubilization of hydrophobic biomolecules and improve the extraction of membrane proteins
• It may also induce different interactions with lipid bilayers, influencing the stability, fluidity, and permeability of the lipid bilayer, potentially impacting the behavior of membrane proteins
• In addition, NG forms larger micelles compared to glucosides with shorter alkyl chains
• Properties of NG • CMC: (H2O) ~ 6.5 mM (0.20%) • Aggregation number: ~ 133 • Purity: ≥ 99% β+α (by HPLC analysis) • pH: 5-8 (1% solution in water)