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P4524

Sigma-Aldrich

β-Lactamase from Enterobacter cloacae

Type IV, lyophilized powder, 0.2-0.6 units/mg protein (using benzylpenicillin)

Sinónimos:

β-Lactamase I, β-Lactamase II, Cephalosporinase, Penicillin amido-β-lactam hydrolase, Penicillinase from Enterobacter cloacae

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About This Item

Número de CAS:
9073-60-3
Comisión internacional de enzimas:
3.5.2.6 (BRENDA, IUBMB)
MDL number:
MFCD00131819
UNSPSC Code:
12352204
NACRES:
NA.54

biological source

bacterial (Enterobacter cloacae)

Quality Level

200

type

Type IV

form

lyophilized powder

specific activity

0.2-0.6 units/mg protein (using benzylpenicillin)

mol wt

29 kDa

composition

Protein, ~60%

technique(s)

enzyme immunoassay: suitable

suitability

suitable for enzyme test

application(s)

pharmaceutical

storage temp.

2-8°C

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General description

β-Lactamase is a monomeric enzyme of 29 kDa. This product is produced from Enterobacter cloacae and is provided as a lyophilized powder. It acts as a target protein for β-lactam antibiotics. This enzyme is present in Gram-negative bacteria.

Application

β--lactamase is used to inactivate β-lactam antibiotics by breaking open the β-lactam ring. β--lactamase is used to study antibiotic resistance and resistance suppression. Product P4524 is produced from Enterobacter cloacae and is provided as a lyophilized powder.
β-Lactamase from Enterobacter cloacae has been used in the maternal and fetal quantitative blood cultures to avoid any carryover phenomenon. It has also been used as a component in Mueller Hinton (MH) broth for placental cultures.

Biochem/physiol Actions

β--lactamase inactivates β-lactam antibiotics by breaking open the β-lactam ring.

Unit Definition

1 U hydrolysiert 1.0 μmol des angegebenen Substrats pro Minute bei pH 7.0 und 25 °C. Wird als Benzylpenicillin Einheiten verkauft. Diese International Einheit (unter Verwendung von Benzylpenicillin als Substrat) entspricht ca. 600 Levy oder 75 Pollock Einheiten.

Physical form

Lyophilized powder containing sodium phosphate buffer salts

Analysis Note

Protein determined by biuret.

Inhibitor

Referencia del producto
Descripción
Precios

pictograms

Health hazard
GHS08

signalword

Danger

hcodes

H317,H334

Hazard Classifications

Resp. Sens. 1 - Skin Sens. 1

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Faceshields, Gloves

Certificados de análisis (COA)

Busque Certificados de análisis (COA) introduciendo el número de lote del producto. Los números de lote se encuentran en la etiqueta del producto después de las palabras «Lot» o «Batch»

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Nitrocefin A chromogenic β-lactamase substrate that undergoes distinctive color change from yellow as the amide bond in the β-lactam ring is hydrolyzed by β-lactamase.

Sigma-Aldrich

484400

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Supelco

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Buprofezin PESTANAL®, analytical standard

Supelco

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Buprofezin

Persistent bacteremia in rabbit fetuses despite maternal antibiotic therapy in a novel intrauterine-infection model
Gras-Le Guen C, et al.
Antimicrobial Agents and Chemotherapy, 47(7), 2125-2130 (2003)
Protein-protein interactions monitored in mammalian cells via complementation of beta-lactamase enzyme fragments
Wehrman T, et al.
Proceedings of the National Academy of Sciences of the USA, 99(6), 3469-3474 (2002)
Past and present perspectives on beta$-lactamases
Bush K
Antimicrobial Agents and Chemotherapy, 62(10) (2018)
P J Johnsen et al.
Genetics, 181(4), 1521-1533 (2009-02-05)
We present a new hypothesis for the selective pressures responsible for maintaining natural competence and transformation. Our hypothesis is based in part on the observation that in Bacillus subtilis, where transformation is widespread, competence is associated with periods of nongrowth
Jung-Ho Shin et al.
EMBO reports, 22(2), e51790-e51790 (2021-01-20)
Bactericidal antibiotics are powerful agents due to their ability to convert essential bacterial functions into lethal processes. However, many important bacterial pathogens are remarkably tolerant against bactericidal antibiotics due to inducible damage repair responses. The cell wall damage response two-component
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