I6758
IPTG
≥99% (TLC), ≤0.1% Dioxane
Synonym(s):
Isopropyl β-D-1-thiogalactopyranoside, IPTG, Isopropyl β-D-thiogalactoside
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About This Item
Empirical Formula (Hill Notation):
C9H18O5S
CAS Number:
Molecular Weight:
238.30
UNSPSC Code:
12352201
NACRES:
NA.31
PubChem Substance ID:
EC Number:
206-703-0
Beilstein/REAXYS Number:
4631
MDL number:
biological source
synthetic
Quality Level
description
non-ionic
assay
≥99% (TLC)
form
powder
technique(s)
thin layer chromatography (TLC): suitable
impurities
≤0.1% Dioxane
color
white to off-white
useful pH range
5-7 (50 g/L)
mp
105 °C ((221 °F))
solubility
water: 0.05 g/L, clear
application(s)
cell analysis
life science and biopharma
storage temp.
2-8°C
SMILES string
CC(C)S[C@@H]1OC(CO)[C@H](O)C(O)[C@H]1O
InChI
1S/C9H18O5S/c1-4(2)15-9-8(13)7(12)6(11)5(3-10)14-9/h4-13H,3H2,1-2H3/t5-,6+,7+,8-,9+/m1/s1
InChI key
BPHPUYQFMNQIOC-NXRLNHOXSA-N
General description
Isopropyl β-D-Thiogalactopyranoside (IPTG) is a molecular biology reagent used to induce gene expression in bacterial systems. It mimics lactose, binding to the lac repressor protein, leading to gene activation. IPTG is crucial for studying gene regulation, protein expression, and recombinant protein production, providing valuable insights into cellular and molecular biology research.
Application
IPTG has been used:
- in the induction of protein expression in Lactobacillus reuteri GroEL and mutants
- in the induction of protein expression in Escherichia coli
IPTG is commonly used in cloning procedures that require induction of β-galactosidase activity. It is used in conjunction with X-Gal or Bluo-Gal in blue-white selection of recombinant bacterial colonies that induce expression of the lac operon in Escherichia coli. IPTG functions by binding to the lacI repressor and altering its conformation, which prevents the repression of the β-galactosidase coding gene lacZ.
Biochem/physiol Actions
IPTG is a non-metabolizable analog of allolactose. It acts as an inducer that regulates the transcriptional activity of the lac promoter, a promoter that is used for the expression of the protein in E.coli.
Preparation Note
A stock solution (0.1 M) is prepared by dissolving IPTG in water with subsequent sterile filtration of the solution. The final concentration of IPTG in indicator plates should be 0.2 mM.
Other Notes
For additional information on our range of Biochemicals, please complete this form.
Non-metabolizable galactose analog.
To gain a comprehensive understanding of our extensive range of Monosaccharides for your research, we encourage you to visit our Carbohydrates Category page.
signalword
Danger
hcodes
Hazard Classifications
Carc. 1B
Storage Class
6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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A self-inducible heterologous protein expression system in Escherichia coli
Briand L, et al.
Scientific Reports, 6 , 33037 -33037 (2016)
Alexandre M M Dias et al.
Journal of gastroenterology, 56(5), 442-455 (2021-03-31)
We previously showed that supernatants of Lactobacillus biofilms induced an anti-inflammatory response by affecting the secretion of macrophage-derived cytokines, which was abrogated upon immunodepletion of the stress protein GroEL. We purified GroEL from L. reuteri and analysed its anti-inflammatory properties
Bin Jiang et al.
Molecular metabolism, 59, 101462-101462 (2022-03-06)
Chronic inflammatory response plays a prominent role in obesity-related nonalcoholic fatty liver disease (NAFLD). However, the intrahepatic triggering mechanism of inflammation remains obscure. This study aimed to elucidate the role of serum amyloid A1 (SAA1), an acute-phase response protein, in