Přejít k obsahu
Merck
Všechny fotografie(1)

Key Documents

BGALS-RO

Roche

β-Glucuronidase

from E. coli K 12

Přihlásitk zobrazení cen stanovených pro organizaci a smluvních cen


About This Item

Číslo enzymu podle klasifikace EK:
UNSPSC Code:
12352204
NACRES:
NA.28

biological source

Escherichia coli K12

Quality Level

form

solution

mol wt

Mr ~220 kDa

packaging

pkg of 1 mL (03707580001)
pkg of 15 mL (03707601001)
pkg of 5 mL (03707598001)

manufacturer/tradename

Roche

storage condition

(Keep container tightly closed in a dry and well-ventilated place.)

parameter

48 °C optimum reaction temp.

technique(s)

activity assay: suitable

color

colorless

optimum pH

6.0-6.5

solubility

water: soluble

suitability

suitable for enzyme test

UniProt accession no.

application(s)

detection
sample preparation

storage temp.

2-8°C

Gene Information

Escherichia coli ... uidA(946149)

General description

Glucuronidase at 25 °C, or 140 U/mg at 37 °C, at pH 7 with 4-nitrophenyl-β-D-glucuronide as substrate; 1 ml β-Glucuronidase contains at least 140 U at 37 °C.

Specificity

Cleaves terminal glucuronic acid which is β-linked to mono-, oligo- or polysaccharides or phenol.

Application

β-Glucuronidases have been used extensively in research and analytical laboratories for the enzymatic hydrolysis of steroid β-glucuronides. β-Glucuronidase is used:
  • for the hydrolysis of steroid conjugates (glucuronides) in urine (pH 6.0–6.5)
  • in doping analysis
  • for the detection of benzodiazepine in small doses.
  • during sample preparation to cleave off glucuronides prior to GC-MS, HPLC, immunoassays, or other analytical methods.
It has been used for the hydrolysis of plasma enterolactone, testosterone and epitestosterone glucuronide.

Biochem/physiol Actions

Glucuronidation is one of the basic principles of metabolism. Many substances presented to the human body undergo metabolic processing that includes conjugation with glucuronic acid by UDP-glucuronosyltransferases (UGTs). β-Glucuronidase, also known as β-D-glucuronoside glucuronosohydrolase, catalyzes the transfer of a glucuronyl group to many biological and pharmacologically active endogenous and exogenous molecules. Glucuronide is in general, more soluble, less toxic, and more easily excreted by the human body compared to the original molecule. To analyze these drug conjugates that are present in body fluids, such as urine and plasma, deconjugation of the glucuronide is necessary. Enzymatic hydrolysis prior to detection is essential to achieving high sensitivity during analysis. After hydrolysis, the sample may be analyzed by mass spectroscopy, gas chromatography, HPLC, immunoassays, or other analytical methods.

Features and Benefits

β-Glucuronidase from E. coli is highly specific for β-glucuronides, and is capable of very quickly hydrolyzing steroid β-glucuronides as well as cleaving many other types of glucuronides, such as benzodiazepine, opioid, and cannabinoid. β-Glucuronidase is used for the enzymatic hydrolysis of glucuronides in biological fluids, primarily urine. Substances used for doping are conjugated with glucuronides, which means that effective doping analysis relies very often on the enzymatic cleavage of conjugated drug molecules by β-glucuronidase.

  • Perform fast analysis due to the enzyme′s high specific activity.
  • Quickly screen for steroids, benzodiazepines, cannabinoids, and opioids.
  • Save time by developing your procedure without the need to clean up the reaction or buffer the urine.

Unit Definition

The international unit of β-glucuronidase activity is the enzyme activity that increases the rate of release of 4-nitrophenol from 4-nitrophenyl-β-D-glucuronide (4NPG) at a temperature of +25 °C and pH 7.0 by 1 μM.
The Fishman unit was previously used. This unit is the release of phenolphthalein from its glucuronide (PPG). It is not possible to measure the relative activities of different preparations for steroid β-glucuronides by comparing their activities with respect to PPG. Many preparation do not catalyze the hydrolysis of PPG, 4NPG, or the various steroid β-glucuronides in urine equally. The choice of 4NPG as standard substrate is based on the following considerations:
  • The Michaelis concentrations for the two substrates are similar (KM = 2 ×10-4 M for 4 NPG and KM = 6 ×10-5 M for PPG), but the corresponding rates of hydrolysis differ:
  • 4NPG is hydrolysed about 5 × as fast as PPG;
  • For PPG, inhibition by excess substrate occurs; this is not observed using 4NPG.

Physical form

Solution in 50% glycerol, pH approximately 6.5
(15 ml in one bottle)

Other Notes

The E.coli β-glucuronidase enzyme is essentially free of sulfatase activity and is especially efficient in cleaving steroid and benzodiazepine conjugates.
For life science research only. Not for use in diagnostic procedures.

Legal Information

The sale of the Product does not exhaust or grant any rights in third party patents including patents of companies of the F. Hoffmann - La Roche AG group of companies, in particular, for the use of modified antibodies obtained by using the product.

Storage Class

12 - Non Combustible Liquids

wgk_germany

WGK 1

flash_point_f

No data available

flash_point_c

No data available


Osvědčení o analýze (COA)

Vyhledejte osvědčení Osvědčení o analýze (COA) zadáním čísla šarže/dávky těchto produktů. Čísla šarže a dávky lze nalézt na štítku produktu za slovy „Lot“ nebo „Batch“.

Již tento produkt vlastníte?

Dokumenty související s produkty, které jste v minulosti zakoupili, byly za účelem usnadnění shromážděny ve vaší Knihovně dokumentů.

Navštívit knihovnu dokumentů

Alan V Rincon et al.
Psychoneuroendocrinology, 120, 104774-104774 (2020-06-24)
Neuroendocrine research on the formation of social bonds has primarily focused on the role of nonapeptides. However, steroid hormones often act simultaneously to either inhibit or facilitate bonding. Testosterone is proposed to mediate a trade-off between male mating effort and
LC-MS/MS-Based Assay for Free and Deconjugated Testosterone and Epitestosterone in Rat Urine and Serum.
Jenkinson C
Journal of Analytical and Bioanalytical Techniques , S5, doi-doi (2014)
Anne-Sophie Morisset et al.
The British journal of nutrition, 102(2), 195-200 (2009-07-10)
There has been a growing interest in lignans, a class of phyto-oestrogens, because of their potentially favourable effects on human health. The aim of the present study was to compare the metabolic profile of post-menopausal women consuming various amounts of
T V Zenser et al.
Drug metabolism and disposition: the biological fate of chemicals, 27(9), 1064-1067 (1999-08-26)
Individuals exposed to carcinogenic aromatic amines excrete arylamine N- and O-glucuronide metabolites. This study assessed the susceptibility of selected glucuronides to hydrolysis by human and Escherichia coli beta-glucuronidase. N- or O-glucuronides were prepared with the following aglycones: benzidine, N-acetylbenzidine, N'-hydroxy-N-acetylbenzidine
Alan V Rincon et al.
General and comparative endocrinology, 281, 117-125 (2019-05-31)
The development of methods to quantify hormones from non-invasively collected samples such as urine or feces has facilitated endocrinology research on wild-living animals. To ensure that hormone measurements are biologically meaningful, method validations are strongly recommended for each new species

Náš tým vědeckých pracovníků má zkušenosti ve všech oblastech výzkumu, včetně přírodních věd, materiálových věd, chemické syntézy, chromatografie, analytiky a mnoha dalších..

Obraťte se na technický servis.