P4399
β-Lactamase from Enterobacter cloacae
Type III, lyophilized powder, 6-18 units/mg protein (using benzylpenicillin)
Synonym(s):
β-Lactamase I, β-Lactamase II, Cephalosporinase, Penicillin amido-β-lactam hydrolase, Penicillinase from Enterobacter cloacae
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About This Item
CAS Number:
UNSPSC Code:
12352204
NACRES:
NA.54
MDL number:
Specific activity:
6-18 units/mg protein (using benzylpenicillin)
type
Type III
form
lyophilized powder
specific activity
6-18 units/mg protein (using benzylpenicillin)
composition
Protein, ~10%
storage temp.
2-8°C
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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 P4399 is produced from Enterobacter cloacae.
Biochem/physiol Actions
β--lactamase inactivates β-lactam antibiotics by breaking open the β-lactam ring.
Physical form
Lyophilized powder containing sodium phosphate and sodium citrate buffer salts
Preparation Note
Chromatographically purified
Analysis Note
Protein determined by biuret
Other Notes
One unit will hydrolyze 1.0 μmole of benzylpenicillin per min at pH 7.0 at 25 °C. This International Unit (using benzylpenicillin as substrate) is approximately equal to 600 Levy or 75 Pollock units.
signalword
Danger
hcodes
Hazard Classifications
Resp. Sens. 1 - Skin Sens. 1
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
dust mask type N95 (US), Eyeshields, Faceshields, Gloves
Regulatory Information
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Arnold Louie et al.
Antimicrobial agents and chemotherapy, 56(1), 258-270 (2011-10-26)
New broad-spectrum β-lactamases such as KPC enzymes and CTX-M-15 enzymes threaten to markedly reduce the utility of our armamentarium of β-lactam agents, even our most potent drugs, such as carbapenems. NXL104 is a broad-spectrum non-β-lactam β-lactamase inhibitor. In this evaluation
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
Ryan M Phelan et al.
Bioorganic & medicinal chemistry letters, 19(4), 1261-1263 (2009-01-27)
An efficient synthesis of a 5-fluorouracil-cephalosporin prodrug is described for use against colorectal and other cancers in antibody and gene-directed therapies. The compound shows stability in aqueous media until specifically activated by beta-lactamase (betaL). The kinetic parameters of the 5-fluorouracil-cephalosporin
Despina Kotsanas et al.
The Medical journal of Australia, 198(5), 267-269 (2013-03-19)
Clinical utility of carbapenem antibiotics is under threat because of the emergence of acquired metallo-β-lactamase (MBL) genes. We describe an outbreak in an intensive care unit (ICU) possibly associated with contaminated sinks. Four clusters of gram-negative bacteria harbouring the MBL
Grace Yim et al.
Canadian journal of microbiology, 59(2), 110-116 (2013-03-07)
Microbial populations in wastewater treatment plants (WWTPs) are increasingly being recognized as environmental reservoirs of antibiotic resistance genes. PCR amplicons for plasmid-mediated quinolone resistance determinants qnrA, qnrB, and qnrS were recorded in samples from a WWTP in Vancouver, British Columbia.
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