G6920
Endo-β-galactosidase from Bacteroides fragilis
recombinant, expressed in E. coli, ≥140 units/mg protein, buffered aqueous solution
Synonym(s):
β-Galactosidase bacterial, Keratanase
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About This Item
Specific activity:
≥140 units/mg protein
Recombinant:
expressed in E. coli
recombinant
expressed in E. coli
Quality Level
conjugate
(Glucosaminoglycan)
sterility
aseptically filled
form
buffered aqueous solution
specific activity
≥140 units/mg protein
mol wt
32 kDa
storage temp.
2-8°C
Application
Endo-β-galactosidase was used in fractional protein isolation. It was used for deglycosylation in glycoproteomics of the endothelial secretome of human endothelial cells.
Biochem/physiol Actions
Internal β(1-4) galactose linkages in unbranched, repeating poly-Nacetyllactosamine [GlcNAc β(1-3)Gal β (1-4)] structures are the preferred substrate.
Sulfated structures such as keratan sulfate are also cleaved. Branching and/or fucosylation of the substrate may reduce or completely inhibit cleavage. Sulfation of C-6 on galactose will block cleavage. Oligosaccharides of the neolacto-group are cleaved at greatly reduced rates depending on the deviation from the preferred substrate. For example, Gal β(1-3)GlcNAc β(1-3) Gal β(1-4)Glc is cleaved at 5X10-5 the rate of keratan sulfate
β-galactosidase cleaves lactose into its monosaccharide components, glucose and galactose. It also catalyses the transglycosylation of glucose into allolactose, the inducer of β-galactosidase, in a feedback loop.
Sulfated structures such as keratan sulfate are also cleaved. Branching and/or fucosylation of the substrate may reduce or completely inhibit cleavage. Sulfation of C-6 on galactose will block cleavage. Oligosaccharides of the neolacto-group are cleaved at greatly reduced rates depending on the deviation from the preferred substrate. For example, Gal β(1-3)GlcNAc β(1-3) Gal β(1-4)Glc is cleaved at 5X10-5 the rate of keratan sulfate
β-galactosidase cleaves lactose into its monosaccharide components, glucose and galactose. It also catalyses the transglycosylation of glucose into allolactose, the inducer of β-galactosidase, in a feedback loop.
Physical form
Aseptically filled solution in 20 mM Tris-HCl, pH 7.5
Other Notes
One unit will release 1.0 μmole of reducing sugar from bovine corneal keratan sulfate per minute at 37 °C, pH 5.8.
Storage Class
10 - Combustible liquids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)
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Xiaoke Yin et al.
Molecular & cellular proteomics : MCP, 12(4), 956-978 (2013-01-25)
Previous proteomics studies have partially unraveled the complexity of endothelial protein secretion but have not investigated glycosylation, a key modification of secreted and membrane proteins for cell communication. In this study, human umbilical vein endothelial cells were kept in serum-free
Maria Vistnes et al.
PloS one, 9(3), e89621-e89621 (2014-03-07)
We hypothesized that cleavage of the extracellular matrix (ECM) proteoglycans versican and aggrecan by ADAMTS (a disintegrin and metalloprotease with thrombospondin motifs) proteases, which contributes to stress-induced ECM-reorganization in atherogenesis and osteoarthritis, also play a role in heart failure development.
William Mark Erwin et al.
Arthritis research & therapy, 17, 240-240 (2015-09-06)
In the present study, we sought to quantify and contrast the secretome and biomechanical properties of the non-chondrodystrophic (NCD) and chondrodystrophic (CD) canine intervertebral disc (IVD) nucleus pulposus (NP). We used iTRAQ proteomic methods to quantify the secretome of both