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The invention develops a stabilized small segment of OspA as a vaccine for Lyme disease. The invention reduces potential side effects of a full length OspA
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Summary Lyme disease is a tick-borne infection caused by the spirochete Borrelia burgdorferi that can result in damages to joints, cardiovascular and nervous systems. Outsurface protein A (OspA) is a major surface antigen of Borrelia burgdorferi. Anti- OspA mAb has been shown to protect severe combined immunodeficiency mice from clinical symptoms of Lyme disease, suggesting that the Anti- OspA mAb blocks spirochete transmission by binding to OspA. The invention develops site-directed mutations of OspA whose fold conformation is stable.