Nucleic acids, proteins, and methods of use of granulocytic...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/31 (2006.01) A61K 31/70 (2006.01) A61K 39/02 (2006.01) A61K 48/00 (2006.01) C07H 21/00 (2006.01) C07K 14/29 (2006.01) C07K 16/12 (2006.01) C12N 5/16 (2006.01) C12Q 1/68 (2006.01) G01N 33/569 (2006.01) A61K 39/00 (2006.01)

Patent

CA 2258266

Nucleic acids encoding eleven different proteins of granulocytic erhlichia (GE), a tick-borne intracellular bacteria, have been isolated and sequenced completely. These DNAs were isolated as immunoreactive clones from a Lambda Zap II genomic library of GE DNA purified from infected HL60 cells. Three of the clones, E8, E80, and E46, contain open reading frames for four highly homologous proteins which appear to be part of a multigene family resembling the MSP-2 gene family of Anaplasma marginale. One clone, B3, contained a gene encoding the heat shock (70) protein. The other clones (W20, E74, and E82) contain open reading frames for proteins which have some homology to other bacterial proteins present in the nucleotide and protein databases. These and other GE antigens identified by immunoscreening of the genomic library are potentially useful as diagnostic reagents and vaccine candidates for GE.

On a isolé et entièrement séquencé des acides nucléiques codant onze protéines différentes d'Erhlichia granulocyte (GE), une bactérie intracellulaire dont la tique est un vecteur. Ces acides nucléiques (ADN) ont été isolés en tant que clones immunoréactifs d'une banque génomique d'ADN de GE Lambda Zap II purifié de ses cellules HL60. Trois de ces clones E8, E80 et E46 contiennent des phases ouvertes de lecture pour quatre protéines éminemment homologues se présentant comme faisant partie d'une famille multigénique ressemblant à la famille de gènes MSP-2 de Anaplasma marginale. B3. L'un des clones contenait un gène codant la protéine 70 du stress. Les autres, (W20, E74 et E82) contiennent des phases ouvertes de lecture présentant une certaine homologie avec d'autres protéines bactériennes présentes dans les bases de données nucléotidiques et protéiniques. Ces clones et autres antigènes de GE identifiés par dosage immunologique de la banque gnomique sont potentiellement utiles comme réactifs diagnostiques et candidats vaccins du GE.

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