Abstract:
DNA sequences obtained from S. clavuligerus, recombinant vectors incorporating such sequences and hosts transformed with such vectors are disclosed. The DNA comprises one or more genes encoding one or more enzymes involved in the biosynthesis of clavulanic acid and may be used to improve the yield of clavulanic acid produced by clavulanic acid-producing organisms such as S. clavuligerus ATCC 27064.
Abstract:
DNA encoding the gene for the synthetase enzyme capable of generating &dgr; (L-a-aminoadipyl)-L-crysteinyl-D-valine (ACV) from its constituent amino acids was obtained from several penicillin and cephalosporin producing organisms, e.g. Penicillium chrysogenum, cephalosporium and a Flavobacterium species. The DNA was used to prepare recombinant vectors comprising the ACV synthetase gene and hosts transformed with such vectors. The ACV synthetase gene can form part of a gene cluster comprising other genes involved in -&bgr;-lactam biosynthesis and the production of penicillin by expression of the entire biosynthetic gene cluster for the synthesis of penicillin from primary amino acids is described. Suitable hosts in which expression can take place include heterologous hosts which are naturally non-producers of penicillin.
Abstract:
DNA comprising a regulatory gene for clavulanic acid biosynthesis. DNA is no greater than 7 kb in length and has the configuration of restriction sites shown in FIG. 1 or a fragment thereof. Use of DNA in a method for producing clavulanic acid in a host.