Campylobacter jejuni Motility Is Required for Infection of the Flagellotropic Bacteriophage F341

被引:42
作者
Baldvinsson, Signe Berg [1 ]
Sorensen, Martine C. Holst [1 ]
Vegge, Christina S. [1 ]
Clokie, Martha R. J. [2 ]
Brondsted, Lone [1 ]
机构
[1] Univ Copenhagen, Dept Vet Dis Biol, Frederiksberg, Denmark
[2] Univ Leicester, Dept Infect Immun & Inflammat, Leicester, Leics, England
关键词
POSTTRANSLATIONAL MODIFICATION; CARBOHYDRATE MODIFICATIONS; FLAGELLIN GLYCOSYLATION; COLONIZATION; IDENTIFICATION; GENE; BIOSYNTHESIS; MUTANTS; GENOME; PHAGE;
D O I
10.1128/AEM.02057-14
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Previous studies have identified a specific modification of the capsular polysaccharide as receptor for phages that infect Campylobacter jejuni. Using acapsular kpsM mutants of C. jejuni strains NCTC11168 and NCTC12658, we found that bacteriophage F341 infects C. jejuni independently of the capsule. In contrast, phage F341 does not infect C. jejuni NCTC11168 mutants that either lack the flagellar filaments (Delta flaAB) or that have paralyzed, i.e., nonrotating, flagella (Delta motA and Delta flgP). Complementing flgP confirmed that phage F341 requires rotating flagella for successful infection. Furthermore, adsorption assays demonstrated that phage F341 does not adsorb to these nonmotile C. jejuni NCTC11168 mutants. Taken together, we propose that phage F341 uses the flagellum as a receptor. Phage-host interactions were investigated using fluorescence confocal and transmission electron microscopy. These data demonstrate that F341 binds to the flagellum by perpendicular attachment with visible phage tail fibers interacting directly with the flagellum. Our data are consistent with the movement of the C. jejuni flagellum being required for F341 to travel along the filament to reach the basal body of the bacterium. The initial binding to the flagellum may cause a conformational change of the phage tail that enables DNA injection after binding to a secondary receptor.
引用
收藏
页码:7096 / 7106
页数:11
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