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    • 9. 发明专利
    • A library of DNA fragments of Escherichia coli strains for the phylogenic determination of a given strain comprises polynucleotides of nature B2/D+ A-
    • FR2806096A1
    • 2001-09-14
    • FR0003145
    • 2000-03-10
    • INST NAT SANTE RECH MED
    • BINGEN EDOUARDBONACORSI STEPHANECLERMONT OLIVIERNASSIF XAVIERTINSLEY COLIN
    • A61K38/00A61K39/00A61K48/00A61P31/04C07K14/245C12N15/31C12Q1/68C12Q1/689A61K39/108C07H21/00C12N15/63
    • A library of DNA fragments of Escherichia Coli (E.Coli) strains comprising polynucleotides (I) of nature B2/D A , is new. Independent claims are also included for the following: (1) Isolating the entire set of chromosomal and plasmid polynucleotides with (I) comprising: (A) subtracting the polynucleotide population of at least one E.Coli strain of group A; (B) randomly shearing from the polynucleotide population of E.coli group B2 or D; (C) cleaving with restriction endonuclease to produce fragments with a mean size of 300 - 500 base pairs; and (D) repeating if necessary. (2) Isolated polynucleotides (II) having (I) with a sequence selected from the following: (i) one of 153 fully defined base pair sequences as given in the specification; (ii) polynucleotide sequences obtained by digesting total DNA of a B2 or D E.coli with a restriction enzyme and selecting the fragments that hybridize with fragments represented by 23 fully defined base pair sequences given in the specification other than those given in (2i); (iii) the sequences of the open reading frames (orfs) containing any of the sequences from (2i) and (2ii); (iv) the nature-conserving variant or fractional sequences of those from (2i) and (2ii); (3) a pair of primers that allow the amplification of (II); (4) probes that are derived from (II); (5) a combination of a polypeptide encoded by (II) and a ligand that inhibits the growth of E.Coli, selected from serum, purified serum, antibodies and monoclonal antibodies; (6) vectors (IV) comprising (II) and transfected host cells (V); (7) phylogenic determination of an E.coli strain using (I); (8) a pharmaceutical composition (VI) comprising (I), or the respective encoded proteins; (9) identifying a compound that inhibits the extra-intestinal growth of E.coli comprising the detection of a compound which is capable of binding to (II) and also to polynucleotides (III) selected from the following: (a) polynucleotides corresponding to the chuA gene and its operon; (b) 37 polynucleotides with fully defined base pair sequences as given in the specification other than those in (2i) and (2ii); (c) polynucleotides obtained by digesting total E.coli DNA from group B2 or D, with NotI or BlnI restriction enzymes and selecting the fragments that hybridize to at least one sequence chosen from 17 fully defined sequences given in the specification, other than those given in (9b), with the exception of polynucleotides sfa, hly, cnf1, pap/prs, hra, and ibe 10; (10) kits (VII) for obtaining (I), (II) and (III); and (11) a vaccine (VIII) for treating or preventing extra-intestinal development of E.coli comprising an immunogenic polynucleotide siolated from (I), or an inactivated isogenic mutant, or the corresponding orfs.