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Content archived on 2024-05-24

Metallo-b-lactamases as model zn enzymes

Objective

A full understanding of the structure-activity relationship in proteins is becoming a major challenge of the post-genomic area. Solving this problem requires multidisciplinary studies in which the functional characteristics of a protein are analyzed and correlated with its structural features. Young scientists are needed who can master various subsets of the large number of techniques involved in this approach. Metallo-Beta-lactamases offer a nearly ideal object for this type of research. They constitute a rather diverse family of enzymes with only a very small number of residues strictly conserved in all proteins but the known 3-D structures are clearly related. Similarly, very different specificity profiles have been observed. Depending upon the enzyme, the most active form contains one or two Zn ^++ ions. These can be replaced by other transition metal divalent cations (Co^++, Cd), with concomitant modifications of the activity profiles. The projected studies will rest on the most up-to-date techniques for the analysis of the protein-metal, protein-substrate and protein-inhibitor interaction and for structural analyses. In consequence, significant technological improvement can be expected and it will be possible to apply this new knowledge to other Zn-hydrolases, some of which are of great biological and clinical interest, for instance the matrix metalloproteases. Finally, the emergence of metallo-Beta-lactamase-producing pathogenic strains represents a worrying clinical problem because they can hydrolyze carbapenems, often utilized as last-resort antibiotics and escape the action of the in activators designed against the active-site-serine Beta- lactamases. The genes encoding several MBLs are plasmid or transposon-borne, which makes their spreading by selective pressure a frightening possibility. For this reason, an important part of the project will be devoted to the search for specific MBL inhibitors which should ideally be active on all MB

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Topic(s)

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Call for proposal

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Funding Scheme

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NET - Research network contracts

Coordinator

UNIVERSITE DE LIEGE
EU contribution
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Address
Allée de la Chimie 3, Bètiment B6
4000 LIEGE
Belgium

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Total cost

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Participants (9)

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