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Infection and Immunity, June 1999, p. 3168-3170, Vol. 67, No. 6
Department of Medicine, University of
Washington, Seattle, Washington 98195
Received 16 February 1999/Accepted 23 March 1999
Previous investigations have demonstrated that immunization with
Treponema pallidum subsp. pallidum
glycerophosphodiester phosphodiesterase significantly protects rabbits
from subsequent treponeme challenge. In this report, we show that the
glycerophosphodiester phosphodiesterase amino acid sequence is
conserved among 12 strains from a total of five pathogenic treponemes.
The invariant nature of this immunoprotective antigen makes it an
attractive candidate for inclusion in a universal subunit vaccine
against T. pallidum infection. In addition, these studies
show a silent nucleotide substitution at position 579 of the
gpd open reading frame which is consistently observed in
the non-T. pallidum subsp. pallidum strains.
This sequence alteration introduces a PleI restriction site
in the nonsyphilis strains and thus allows genetic differentiation from
T. pallidum subsp. pallidum strains.
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Sequence Conservation of Glycerophosphodiester
Phosphodiesterase among Treponema pallidum Strains
*
Corresponding author. Mailing address: Department of
Medicine, University of Washington, 1959 Pacific Ave., N.E., Box
357185, Seattle, WA 98195. Phone: (206) 543-0821. Fax: (206) 685-8681. E-mail: wesley{at}u.washington.edu.
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