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Recommended Series | α-D-Xylosidase Detection Substrates: Chromogenic, Colorimetric & Fluorescent Options — From Colony Screening to High-Sensitivity Quantification
2026/3/6 15:04:15 Browse volume(3)X‑α‑Xyl / 4MU‑α‑Xyloside / PNP‑α‑Xyloside
I. Enzymatic Background: The "Hidden Key" to Unlocking Plant Sugar Chains
α-D-Xylosidase (EC 3.2.1.177) is an exoglycosidase that specifically hydrolyzes α-D-xylosidic bonds from the non-reducing end of glycoconjugates, specifically recognizing α-configuration glycosidic bonds. It is a specialized tool enzyme for studying specific glycosylation modifications, xyloglucan metabolism, and microbial glycometabolism functions.
In plant physiology, xylose is widely present in hemicellulose structures, and α-D-xylosidase is involved in cell wall remodeling and developmental regulation.
In the field of microbiology, various bacteria and fungi secrete this enzyme to degrade plant polysaccharides and obtain carbon sources.
In biomass conversion and biofuel development, α-D-xylosidase is a key member of the efficient lignocellulose-degrading enzyme system.
• Microbial Functional Characterization: Identifying and distinguishing the polysaccharide degradation capabilities of strains.
• Zymography Construction: Refining the functional glycosidase zymogram.
• Plant Cell Wall Research: Analyzing xyloglucan metabolism and cell wall relaxation mechanisms.
• Biomass Conversion: Screening for efficient lignocellulose-degrading enzyme systems.
• Glycan Structure Analysis: Aiding in the localization and identification of xylose modification sites.
α-D-Xylosidase specifically recognizes and hydrolyzes α-D-xylosidic bonds. When an α-D-xyloside labeled with a signal group is introduced as a substrate into the reaction system, the cleavage process simultaneously releases a detectable signal molecule.
Depending on the labeling group, the reaction result can manifest as:
Chromogenic precipitation (X-α-Xyl → blue insoluble product)
Colorimetric change (PNP-α-Xyloside → yellow solution)
Fluorescence increase (4MU-α-D-Xyloside → blue fluorescence)
The signal intensity is positively correlated with the enzyme activity level, thus enabling intuitive interpretation and quantitative analysis of α-D-xylosidase activity.
✅ High Specificity: Relies on α-D-configuration recognition, high configurational specificity, reduces interference from other glycosidases.
✅ Intuitive Signal: Reaction results are visible, facilitating rapid interpretation.
✅ Good Reproducibility: Stable signal output, suitable for batch screening and comparative analysis.
✅ Platform Compatibility: Adaptable to various detection platforms such as plate chromogenic assays, microplate reader colorimetry, and fluorescence spectrophotometers.
1. X-α-Xyl
Chinese Name: 5-Bromo-4-chloro-3-indolyl α-D-xylopyranoside
English Name: 5-Bromo-4-chloro-3-indolyl α-D-xylopyranoside
Abbreviation: X-α-Xyl
CAS Number: 1301706-83-1
Molecular Formula: C13H13BrClNO5
Molecular Weight: 378.60
Specifications: 100 mg / 500 mg / 1 g (Custom packaging supported)
Form: Lyophilized powder
Product Number: G01010019
Stock: Made to order
Color: Blue
Application: Chromogenic substrate (Plate screening / In-situ tissue localization)
2. 4MU-α-D-Xyloside
Chinese Name: 4-Methylumbelliferyl α-D-xylopyranoside
English Name: 4-Methylumbelliferyl α-D-xylopyranoside
Abbreviation: 4MU-α-D-Xyloside
CAS Number: 1643953-00-7
Molecular Formula: C15H16O7
Molecular Weight: 308.29
Specifications: 100 mg / 500 mg / 1 g (Custom packaging supported)
Form: Lyophilized powder
Product Number: G01070025
Stock: Made to order
Color: Blue fluorescence
Application: Fluorescent substrate (Quantitative enzyme activity / Kinetic analysis)
3. PNP-α-Xyloside
Chinese Name: 4-Nitrophenyl α-D-xylopyranoside
English Name: 4-Nitrophenyl α-D-xylopyranoside
Abbreviation: PNP-α-Xyloside
CAS Number: 10238-28-5
Molecular Formula: C11H13NO7
Molecular Weight: 271.22
Specifications: 100 mg / 500 mg / 1 g (Custom packaging supported)
Form: Lyophilized powder
Product Number: G01060005
Stock: In stock
Color: Yellow
Application: Colorimetric substrate (High sensitivity detection / Trace enzyme activity analysis)
Extended Services
From plate chromogenic assays to fluorescence quantification, a comprehensive set of substrates covers all α-D-xylosidase detection needs.
For more chromogenic substrates or custom packaging services, please call +86-13302967066!
GeneSeqTools Bioscience & Technology is dedicated to providing reliable domestic alternative solutions for gene sequencing, molecular diagnostics, and microbial detection.
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