当前位置： SCI文献检索 > MICROBIAL PATHOGENESIS期刊下所有文献 > The surface structure seen on gonococci after treatment with CMP-NANA is due to sialylation of surface lipopolysaccharide previously described as a 'capsule'.

The surface structure seen on gonococci after treatment with CMP-NANA is due to sialylation of surface lipopolysaccharide previously described as a 'capsule'.

Abstract：

:Phenotypic serum resistance of gonococci in urethral exudates is due to sialylation of lipopolysaccharide (LPS) by host cytidine 5'-monophospho-N-acetyl neuraminic acid (CMP-NANA). A surface structure was visible on gonococci [strain BS4 (agar)] that had been stained with ruthenium red after incubation with CMP-NANA. This structure was not visible after neuraminidase treatment, which released sialic acid but not LPS. The LPS profiles of strain BS4 (agar) had another in vivo-selected strain Gc40 (variant D1), were similar. A monoclonal antibody (mAb) which recognises epitope C on the LPS of 'capsulated' gonococci was shown by immunoblotting to react with several LPS components, including one of about 4.5 kDa which contains the probable site of sialylation by CMP-NANA. The reactions with the mAb were not affected by growing the strains with CMP-NANA nor by neuraminidase treatment of the sialylated LPS. The mAb also gold-labelled the surface of both strains before and after treatment with CMP-NANA. These data indicate that sialylation by CMP-NANA and staining with ruthenium red renders more visible the surface LPS which, sometimes in the past, has been seen as a 'capsule'.

journal_name

Microb Pathog

journal_title

Microbial pathogenesis

authors

Fox AJ,Curry A,Jones DM,Demarco de Hormaeche R,Parsons NJ,Cole JA,Smith H

doi

10.1016/0882-4010(91)90050-k

subject

Has Abstract

pub_date

1991-09-01 00:00:00

pages

199-210

issue

3

eissn

0882-4010

issn

1096-1208

pii

0882-4010(91)90050-K

journal_volume

11

pub_type

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