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N9284

Sigma-Aldrich

Nitroreductase from Escherichia coli

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≥90% (SDS-PAGE), recombinant, expressed in E. coli

Synonym(s):

NTRA

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About This Item

MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54

recombinant

expressed in E. coli

Quality Level

assay

≥90% (SDS-PAGE)

form

lyophilized powder

specific activity

≥100 units/mL

mol wt

monomer 24000

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UniProt accession no.

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shipped in

wet ice

storage temp.

−20°C

Gene Information

Escherichia coli K12 ... nfsB(945483)

General description

Nitroreductase is a flavoprotein and is encoded by the NfsB gene. It comprises a dimer, with 217 amino acids and active site in each subunit. The structure has FMN and the substrate bound to the enzyme.

Application

Nitroreductase from Escherichia coli has been used in the conjugation generation with pig liver esterase (PLE). It has also been used in chemiluminescence response studies with probes HyCL-3 and HyCL-4-AM in rat liver microsomes.

Biochem/physiol Actions

Nitroreductase (NTR) catalyzes the reduction of nitroaromatic substrates and quinones. The mutant F124K of NTR is useful in cancer therapy and improves sensitization of drug CB1954.
Nitroreductase increases the sensitivity of organisms to nitro-containing drugs such as metronidazole by converting the nitro group to a cytotoxic nitro radical.
Nitroreductases can play a crucial role in redox systems via NADPH or NADH as a reductant.
Shows ability to reduce quinines. Enzyme for activating prodrugs in antibody directed enzyme prodrug therapy.

Physical properties

Lyophilized powder containing PBS. Does not contain BSA as excipient

Unit Definition

One unit will reduce one μmole of Cytochrome C per minute in the presence of Menadione and NADH at pH 7.4 at 37 °C.

Preparation Note

Produced using animal component-free materials.

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

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Sébastien Jenni et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 248, 119179-119179 (2020-11-30)
The ever-growing demand for fluorogenic dyes usable in the rapid construction of analyte-responsive fluorescent probes, has recently contributed to a revival of interest in the chemistry of diketopyrrolopyrrole (DPP) pigments. In this context, we have explored the potential of symmetrical
G M Anlezark et al.
Biochemical pharmacology, 50(5), 609-618 (1995-08-25)
A nitroreductase isolated and purified from Escherichia coli B has been demonstrated to have potential applications in ADEPT (antibody-directed enzyme prodrug therapy) by its ability in vitro to reduce dinitrobenzamides (e.g. 5-aziridinyl 2,4-dinitrobenzamide, CB 1954 and its bischloroethylamino analogue, SN
Generation of Escherichia coli nitroreductase mutants conferring improved cell sensitization to the prodrug CB1954
Grove JI, et al.
Cancer research, 63(17), 5532-5537 (2003)
Bharat Bhushan et al.
Biochemical and biophysical research communications, 322(1), 271-276 (2004-08-18)
Previously, we reported that a salicylate 1-monooxygenase from Pseudomonas sp. ATCC 29352 biotransformed CL-20 (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaaza-isowurtzitane) (C(6)H(6)N(12)O(12)) and produced a key metabolite with mol. wt. 346 Da corresponding to an empirical formula of C(6)H(6)N(10)O(8) which spontaneously decomposed in aqueous medium to
Mansooreh Jaberipour et al.
Biochemical pharmacology, 79(2), 102-111 (2009-08-12)
Prodrug activation gene therapy for cancer involves expressing prodrug-activating enzymes in tumour cells, so they can be selectively killed by systemically administered prodrug. For example, Escherichia colinfsB nitroreductase (E.C. 1.6.99.7)(NTR), sensitises cells to the prodrug CB1954 (5-[aziridin-1-yl]-2,4-dinitrobenzamide), which it converts

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