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BioAssay: AID 575013

Ratio of Kcat to Km for Pseudomonas aeruginosa beta-lactamase IMP-1 by UV spectrophotometric analysis

ME1071, a maleic acid derivative, is a novel specific inhibitor for metallo-beta-lactamases (MBL). In this study, the potentiation of ME1071 in combination with several beta-lactams was evaluated using MBL-producing Pseudomonas aeruginosa isolates. The rates of susceptibility of MBL producers to carbapenems (imipenem, biapenem, and doripenem) and ceftazidime were increased by 8 to 27% in the more ..
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 Tested Compounds
 Tested Compounds
All(3)
 
 
Unspecified(3)
 
 
 Tested Substances
 Tested Substances
All(3)
 
 
Unspecified(3)
 
 
 Related BioAssays
 Related BioAssays
AID: 575013
Data Source: ChEMBL (723553)
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2011-09-18
Modify Date: 2014-08-24

Data Table ( Complete ):           View All Data
Target
Sequence: Metallo-beta-lactamase IMP-1 (Beta-lactamase IMP-1) (Metallo-beta-lactamase) (IMP-1 metallo-beta-lactmase) (Beta-lactamase) (Extended-spectrum B-lactamase) (Bla-imp protein)
Description ..   
Comment ..   

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Tested Compounds:
Description:
Title: In vitro potentiation of carbapenems with ME1071, a novel metallo-beta-lactamase inhibitor, against metallo-beta-lactamase- producing Pseudomonas aeruginosa clinical isolates.

Abstract: ME1071, a maleic acid derivative, is a novel specific inhibitor for metallo-beta-lactamases (MBL). In this study, the potentiation of ME1071 in combination with several beta-lactams was evaluated using MBL-producing Pseudomonas aeruginosa isolates. The rates of susceptibility of MBL producers to carbapenems (imipenem, biapenem, and doripenem) and ceftazidime were increased by 8 to 27% in the presence of 32 microg/ml of ME1071. The corresponding resistance rates were decreased by 13 to 46%, respectively. On the other hand, ME1071 showed weaker or no potentiation with non-MBL producers. The K(i) value of ME1071 for IMP-1 was 0.4 microM, significantly lower than the K(m) values of carbapenems for the IMP-1 enzyme. On the other hand, the K(i) value of ME1071 for VIM-2 was 120 microM, higher than the K(m) values of carbapenems for the VIM-2 enzyme. Results of this study indicate that ME1071 can potentiate the activity of ceftazidime and carbapenems against MBL-producing strains of P. aeruginosa.
(PMID: 20606062)
Categorized Comment - additional comments and annotations
From BioAssay Depositor:
Assay Type: Binding
Target Type: Target is a single protein chain
Assay Data Source: Scientific Literature
Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1Kcat/Km activity commentKcat/Km activity commentString
2Kcat/Km standard flagKcat/Km standard flagInteger
3Kcat/Km qualifierKcat/Km qualifierString
4Kcat/Km published valueKcat/Km published valueFloat/uM/s
5Kcat/Km standard valueKcat/Km standard valueFloatuM-1 s-1

Data Table (Concise)
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