Lactoferrin receptor protein

Details Lactoferrin receptor protein Lactoferrin receptor protein

C - Chemistry, Metallurgy

12

P

C12P 21/08 (2006.01) A61K 39/02 (2006.01) A61K 39/095 (2006.01) C07K 1/36 (2006.01) C07K 14/21 (2006.01) C07K 14/22 (2006.01) C07K 16/12 (2006.01) G01N 33/566 (2006.01) G01N 33/569 (2006.01) A61K 39/00 (2006.01)

Patent

CA 2162193

An isolated and purified lactoferrin receptor protein is isolated and purified from bacterial pathogens, including Moraxella and Neisseria, and has a molecular weight of between about 70,000 and about 90,000, as determined by SDS-PAGE. Such lactoferrin receptor protein may be provided in combination with a lactoferrin receptor protein from the bacterial pathogen of a molecular weight of about 100,000 to about 105,000 daltons. The lactoferrin receptor protein may be produced by providing a solubilized membrane preparation from the bacterial pathogen containing lactoferrin receptor proteins, non-lactoferrin receptor proteins and other contaminants, complexing the lactoferrin receptor proteins with lactoferrin and purifying the resulting complexes substantially free from the non-lactoferrin receptor proteins and the other contaminants, and separating the novel lactoferrin receptor protein from the complexes. The lactoferrin receptor protein is useful in diagnostic applications and immunogenic compositions, particularly for in vivo administration to a host to confer protection against disease caused by a bacterial pathogen that produces the lactoferrin receptor protein or produces a protein capable of inducing antibodies in a host specifically reactive with the lactoferrin receptor protein.

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