Maria Chatzidaki-Livanis

Publications16
h-index13
Citations743
Highly Influential Citations50
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Genetic variation in the Vibrio vulnificus group 1 capsular polysaccharide operon.
Vibrio vulnificus produces human disease associated with raw-oyster consumption or wound infections, but fatalities are limited to persons with chronic underlying illness. Capsular polysaccharide… Expand
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A General O-Glycosylation System Important to the Physiology of a Major Human Intestinal Symbiont
The Bacteroides are a numerically dominant genus of the human intestinal microbiota. These organisms harbor a rare bacterial pathway for incorporation of exogenous fucose into capsular… Expand
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Genetic Distinctions among Clinical and Environmental Strains of Vibrio vulnificus
ABSTRACT Vibrio vulnificus causes rare but frequently fatal septicemia associated with raw oyster consumption by persons with underlying hepatic or immune system dysfunction. The virulence potential… Expand
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Bacteroides fragilis type VI secretion systems use novel effector and immunity proteins to antagonize human gut Bacteroidales species
Significance Mechanisms of competition are not well-studied in the mammalian gut microbiota, especially among abundant species of this ecosystem. Theoretical models predict that antagonistic… Expand
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Phylum‐wide general protein O‐glycosylation system of the Bacteroidetes
The human gut symbiont Bacteroides fragilis has a general protein O‐glycosylation system in which numerous extracytoplasmic proteins are glycosylated at a three amino acid motif. In B. fragilis,… Expand
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Role of glycan synthesis in colonization of the mammalian gut by the bacterial symbiont Bacteroides fragilis
Bacteroides species are the most abundant Gram-negative bacteria of the human colonic microbiota. These endogenous organisms are unique in that they synthesize an extensive number of phase-variable… Expand
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Trans locus inhibitors limit concomitant polysaccharide synthesis in the human gut symbiont Bacteroides fragilis
Bacteroides is an abundant genus of bacteria of the human intestinal microbiota. Bacteroides species synthesize a large number of capsular polysaccharides (PS), a biological property not shared with… Expand
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A family of transcriptional antitermination factors necessary for synthesis of the capsular polysaccharides of Bacteroides fragilis.
A single strain of Bacteroides fragilis synthesizes eight distinct capsular polysaccharides, designated PSA to PSH. These polysaccharides are synthesized by-products encoded by eight separate… Expand
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Expression of a uniquely regulated extracellular polysaccharide confers a large-capsule phenotype to Bacteroides fragilis.
Bacteroides fragilis synthesizes eight distinct capsular polysaccharides, more than any described bacterium outside the order Bacteroidales. Here, we show that this organism also produces a… Expand
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Bacteroidales Secreted Antimicrobial Proteins Target Surface Molecules Necessary for Gut Colonization and Mediate Competition In Vivo
ABSTRACT We recently showed that human gut Bacteroidales species secrete antimicrobial proteins (BSAPs), and we characterized in vitro the first such BSAP produced by Bacteroides fragilis. In this… Expand
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