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Infection and Immunity, December 2000, p. 6526-6534, Vol. 68, No. 12
0019-9567/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Effect of alpha -Oligosaccharide Phenotype of Neisseria gonorrhoeae Strain MS11 on Invasion of Chang Conjunctival, HEC-1-B Endometrial, and ME-180 Cervical Cells

Susie Y. Minor,1 Asesh Banerjee,2 and Emil C. Gotschlich1,*

Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, New York, New York 10021,1 and Department of Biology, The Catholic University of America, Washington, D.C. 200642

Received 24 February 2000/Returned for modification 15 May 2000/Accepted 24 August 2000

The genes encoding the glycosyltransferases responsible for the addition of the five sugars in the alpha -oligosaccharide (alpha -OS) moiety of lipooligosaccharide (LOS) have been identified. Disruption of these glycosyltransferase genes singly or in combination results in corresponding truncations in LOS. In the present work we show that sequential deletion of the terminal four sugar residues of gonococcal alpha -OS had no discernible effect on the invasion of human conjunctival, endometrial, and cervical cell lines. However, deletion of the proximal glucose, which resulted in the complete deletion of alpha -OS, significantly impaired invasion of the gonococci into all three cell lines. The effect of deleting alpha -OS on invasion was independent of and additive to the known invasion-promoting factor OpaA. These data suggest that the proximal glucose residue of the alpha -OS chain of LOS is required for efficient invasion of gonococci into host mucosa.

* Corresponding author. Mailing address: Laboratory of Bacterial Pathogenesis and Immunology, The Rockefeller University, 1230 York Avenue, New York, NY 10021. Phone: (212) 327-8610. Fax: (212) 327-8960. E-mail: ecg{at}rockvax.rockefeller.edu.

Infection and Immunity, December 2000, p. 6526-6534, Vol. 68, No. 12
0019-9567/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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