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α-Rhamnosidase (prokaryote)

alpha-Rhamnosidase prokaryote E-RHAMS
Product code: E-RHAMS

3,000 Units at 50oC

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Content: 3,000 Units at 50oC
Shipping Temperature: Ambient
Storage Temperature: 2-8oC
Formulation: In 3.2 M ammonium sulphate
Physical Form: Suspension
Stability: Minimum 1 year at 4oC. Check vial for details.
Enzyme Activity: Other Activities
EC Number:
CAZy Family: GH78
CAS Number: 37288-35-0
Synonyms: alpha-L-rhamnosidase; alpha-L-rhamnoside rhamnohydrolase
Source: Prokaryote
Molecular Weight: 75,400
Concentration: Supplied at ~ 1,500 U/mL
Expression: Recombinant from a Prokaryotic source
Specificity: Hydrolysis of terminal non-reducing α-L-rhamnose residues in α-L-rhamnosides.
Specific Activity: ~ 190 U/mg (50oC, pH 6.5 on p-nitrophenyl-α-L-rhamnoside)
Unit Definition: One Unit of α-L-rhamnosidase activity is defined as the amount of enzyme required to release one µmole of p-nitrophenol (pNP) per minute from p-nitrophenyl-α-rhamnoside (5 mM) in sodium phosphate buffer (100 mM), pH 6.5 at 50oC.
Temperature Optima: 50oC
pH Optima: 6.5
Application examples: Applications in carbohydrate and biofuels research.

High purity recombinant α-Rhamnosidase (prokaryote) for use in research, biochemical enzyme assays and in vitro diagnostic analysis.

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Certificate of Analysis
Safety Data Sheet
Characterisation of the mucilage polysaccharides from Dioscorea opposita Thunb. with enzymatic hydrolysis.

Ma, F., Wang, D., Zhang, Y., Li, M., Qing, W., Tikkanen-Kaukanen, C., Liu, X. & Bell, A. E. (2018). Food Chemistry, 245, 13-21.

The mucilage polysaccharides from Dioscorea opposita (DOMP) were extracted and treated with a single/dual enzymatic hydrolysis. The characterisation and viscosity were subsequently investigated in this study. DOMP obtained 62.52% mannose and 23.45% glucose. After single protease and trichloroacetic acid (TCA) treatments, the mannose content was significantly reduced to 3.96%, and glucose increased from 23.45% to 45.10%. Dual enzymatic hydrolysis also decreased the mannose and glucose contents to approximately 18%–35% and 7%–19%, respectively. The results suggest that enzymatic degradation could effectively remove the protein from DOMP accompanied by certain polysaccharides, especially mannose. The molecular weight, surface morphology, viscosity and particle sizes were measured. Enzymatic hydrolysis reduced molecular weight, decreased the viscosity, and increased the particle sizes, which indicates that the characterisations of DOMP samples were altered as structures changed. This study was a basic investigation into characterisation of DOMP to contribute to the processing of food by-products.

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New assay of α-L-rhamnosidase.

Potocká, E. K., Mastihubová, M., Čičová, I. & Mastihuba, V. (2017). Monatshefte für Chemie-Chemical Monthly, 149(1), 167-174.

Free rutinose was prepared by enzymatic hydrolysis of rutin using defatted seed meal from tartary buckwheat. This disaccharide was used as substrate in spectrophotometric assay of α-L-rhamnosidase. The assay is based on hydrolysis of rutinose and subsequent determination of released glucose by a standard glucose oxidase assay kit. The method is easy to perform and requires no expensive equipment. The assay was applied in α-L-rhamnosidase estimation in ten commercial enzyme preparations and compared with standard assay on chromogenic substrate.

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Rhamnosidase activity of selected probiotics and their ability to hydrolyse flavonoid rhamnoglucosides.

Mueller, M., Zartl, B., Schleritzko, A., Stenzl, M., Viernstein, H. & Unger, F. M. (2017). Bioprocess and Biosystems Engineering, 1-8.

Bioavailability of flavonoids is low, especially when occurring as rhamnoglucosides. Thus, the hydrolysis of rutin, hesperidin, naringin and a mixture of narcissin and rutin (from Cyrtosperma johnstonii) by 14 selected probiotics was tested. All strains showed rhamnosidase activity as shown using 4-nitrophenyl α-L-rhamnopyranoside as a substrate. Hesperidin was hydrolysed by 8-27% after 4 and up to 80% after 10 days and narcissin to 14-56% after 4 and 25-97% after 10 days. Rutin was hardly hydrolysed with a conversion rate ranging from 0 to 5% after 10 days. In the presence of narcissin, the hydrolysis of rutin was increased indicating that narcissin acts as an inducer. The rhamnosidase activity as well as the ability to hydrolyse flavonoid rhamnoglucosides was highly strain specific. Naringin was not hydrolysed by rhamnosidase from probiotics, not even by the purified recombinant enzyme, only by fungal rhamnosidase. In conclusion, rhamnosidases from the tested probiotics are substrate specific cleaving hesperidin, narcissin and to a small extent rutin, but not naringin.

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Effect of high hydrostatic pressure treatment on isoquercetin production from rutin by commercial α-L-rhamnosidase.

Kim, D. Y., Yeom, S. J., Park, C. S. & Kim, Y. S. (2016). Biotechnology Letters, 38(10), 1775-1780.

Objectives: To optimize conversion of rutin to isoquercetin by commercial α-L-rhamnosidase using high hydrostatic pressure (HHP). Results: The de-rhamnosylation activity of α-L-rhamnosidase for isoquercetin production was maximal at pH 6.0 and 50°C using HHP (150 MPa). The enzyme showed high specificity for rutin. The specific activity for rutin at HHP was 1.5-fold higher than that at atmospheric pressure. The enzyme completely hydrolysed 20 mM rutin in tartary buckwheat extract after 2 h at HHP, with a productivity of 10 mM h−1. The productivity and conversion were 2.2- and 1.5-fold higher at HHP than at atmospheric pressure, respectively. Conclusions: This is the first report concerning the enzymatic hydrolysis of isoquercetin in tartary buckwheat at HHP.

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Safety Information
Symbol : Not Applicable
Signal Word : Not Applicable
Hazard Statements : Not Applicable
Precautionary Statements : Not Applicable
Safety Data Sheet
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