PS-5 inhibition of a .BETA.-lactamase from Proteus vulgaris.

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The Journal of Antibiotics Ps-5 Inhibition of a B-lactamase from Proteus Vulgaris*

Inhibition of Proteus vulgaris B-lactamase by a new B-lactam antibiotic, PS-5 was studied kinetically. There were two stages of inhibition. In the early stage, PS-5 inhibited the Blactamase by formation of a MICHAELIS-complex, and showed a competitive inhibition pattern with Kj-value of 0.22 uM (substrate, cephaloridine). After the formation of a MICHAELIScomplex between PS-5 and the enzyme, PS...

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Kinetic studies on the inhibition of Proteus vulgaris beta-lactamase by imipenem.

Imipenem was found to inhibit Proteus vulgaris beta-lactamase in a progressive manner. Kinetic experiments confirmed that the inactivated enzyme was not completely recovered after intact imipenem had been exhausted.

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Purification and properties of beta-lactamase from Proteus morganii.

The cephalosporin beta-lactamase was purified from a strain of Proteus morganii that showed resistance to beta-lactam antibiotics and produced the enzyme constitutively. The purified enzyme preparation gave a single protein band on polyacrylamide gel electrophoresis and consisted of a single polypeptide of molecular weight 38,000 to 40,000 from gel filtration of Sephadex G-100 and sodium dodecy...

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Emergence of extended-spectrum beta-lactamase PER-1 in Proteus vulgaris and Providencia stuartii isolates from Algiers, Algeria.

PER -lactamases are one of the rarer extended-spectrum -lactamase (ESBL) families; however, their prevalence is increasing more and more. Two PER types have been described previously (1, 3–7). In addition, sequences for PER-3, -4, and -5 from Aeromonas punctata, Proteus vulgaris, and Acinetobacter baumannii are available in the GenBank database (accession no. AY740681, EU748544, and EU687473); ...

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Bacteriophage typing of Proteus mirabilis, Proteus vulgaris, and Proteus morganii.

A bacteriphage typing scheme for differentiating Proteus isolated from clinical specimens was developed. Twenty-one distinct patterns of lysis were seen when 15 bacteriophages isolated on 8 Proteus mirabilis, 1 P. vulgaris, and 1 P. morganii were used to type 162 of 189 (85.7%) P. mirabilis and P. vulgaris isolates. Seven phages isolated on 3 P. morganii were used to type 13 of 19 (68.4%) P. mo...

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ژورنال

عنوان ژورنال: The Journal of Antibiotics

سال: 1980

ISSN: 0021-8820,1881-1469

DOI: 10.7164/antibiotics.33.293