Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Gliding Motility"”.
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Identification of genes involved in gliding motility and proteomic analysis of spore inner membrane proteins in Clostridium perfringens
… migrate across surfaces using a type of gilding motility that involves the formation of filaments of bacteria lined up in an end to end conformation. To discover the gene products that play a role in gliding, we developed a plasmid-based mariner transposon mutagenesis system that works …
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Independence and interdependence: signal transduction of two chemosensory receptors important for the regulation of gliding motility in Myxococcus xanthus
… play important roles in the regulation of gliding motility. The Dif system regulates the production of exopolysaccheride (EPS), which is essential for social motility and fruiting body formation. The Frz pathway controls reversal frequency, which is fundamental for directed movement by this …
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A Molecular Basis for Divergent, Unstable Actin Filaments in Toxoplasma gondii
… invasion of host cells involves a unique gliding motility mechanism that is dependent on polymerization of parasite actin. However, in non-motile parasites, the majority of actin is monomeric and filaments only assemble upon initiation of gliding motility. Actin filament turnover is …
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The Role of CcpA in Regulating the Carbon-Starvation Response of Clostridium perfringens
… potential virulence factors, sporulation, motility and biofilm formation. Sporulation protects cells from a variety of stresses, including starvation. Efficient sporulation requires the transcriptional regulator CcpA, mediator of catabolite repression. Sporulation is repressed by glucose, …
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The Role of Actin Depolymerizing Factor in Regulating Actin Dynamics in Toxoplasma gondii
… parasites utilize a unique process of rapid motility termed gliding, which is coupled to their invasion of host cells. Gliding and invasion are dependent on parasite actin filaments, yet parasite actin is mostly non-filamentous. Filaments have been detected only transiently during gliding, …
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Novel applications of advanced optical microscopy for microbiology
… microbiological questions centred on bacterial gliding motility, the spatial organisation of biofilms, and the growth of bacteria in a mimetic three-dimensional (3D) culture environment. The gliding motility of Myxococcus xanthus has been described as a lateral process, and it was unclear if …
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Molekulare Mechanismen der Plasmodium-Anopheles Interaktionen
… haben gezeigt, dass UOS3 essentiell für die gliding motility und Zellinvasion der Sporozoiten in die Speicheldrüsen der Mücke und Hepatozyten des Säugetiers ist. Damit konnte erstmals neben dem Invasin TRAP ein weiteres Parasiten-Gen beschrieben werden, das zentrale Sporozoiten-Funktionen …
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Localization of Type IV Pilin Polymerization Proteins in Clostridium perfringens
… anaerobic Gram-positive rod which has gliding motility through type IV Pili (TFP). Since the discovery of TFP in Gram-positive bacteria is relatively new, more studies are required to understand the mechanism and interaction of the proteins of this machinery. Moreover, the similarities …
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How Kinesin-1 Deals With Roadblocks: Biophysical Description and Nanotechnological Application
… and nano-assembly devices. However, in this gliding motility setup, cargo and motors share the filament lattice as a common substrate for their activity. Therefore, it is important to understand the influence of cargo-loading on transport properties. By performing single molecule stepping …
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Regulation of Exopolysaccharide Production in Myxococcus Xanthus
The surface gliding motility of Myxococcus xanthus is required for a multicellular developmental process initiated by unfavorable growth conditions. One form of the M. xanthus surface motility, social (S) gliding, is mediated by the extension and retraction of polarly localized type IV pili (Tfp). …
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Purification and properties of some fresh water and marine cyanobacteria belonging to the orders Chamaesiphonales and Pleurocapsales
… initially lacking this layer, show transient gliding motility after release. Among the spore-forming strains, six major strain clusters could be distinguished in terms of their developmental patterns and each strain cluster could be identified with an existing genus. These included strictly …
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Discovery and functional analyses of new components of the apical complex and the pellicle of Toxoplasma gondii
… as the loss of AAP6 caused defects in parasite gliding motility, invasion and intracellular replication. A possible explanation for these defects is that the annuli might participate in the regulation of secretion processes as constitutive microneme exocytosis was impaired after AAP6 knockdown. …
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Regulation of Toxoplasma Motility by Calcium-Dependent Protein Kinases
… host cells actively, through a process termed gliding motility. This type of motility, unique to apicomplexans, relies on the directional translocation of adhesins via an actomyosin motor complex anchored in a vesicular network underlying the plasma membrane of the parasite. A variety of …
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Patterning planar surfaces with motor proteins: Towards spatial control over motile microtubules
… and their functionality microtubule-based gliding motility assays were performed. It was shown that the microtubules bind to the patterned kinesin-1 molecules and are transported exclusively in the patterned areas. While the achieved pattern sizes were currently in the range of ten …
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Mathematical modelling of motility regulation in Myxococcus xanthus
… unique behaviors such as coordinated motility, cooperative feeding, and multicellular structure formation. Its complex social behaviors and developmental processes make M. xanthus a model organism for studying bacterial social behaviors and their underlying mechanisms. Much of the …
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Characterization of swimming motility in a marine unicellular cyanobacterium
… functional significance of the unique swimming motility displayed by some oceanic isolates of the cyanobacterium Synechococcus was investigated. A variety of analytical techniques confirmed that these strains swam through liquids without flagella or flagellar-like appendages. No extracellular …
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Investigating the Roles of the Stk Locus in Development, Motility and Exopolysaccharide Production in Myxococcus Xanthus
… displays a type IV pili (TFP) mediated surface motility known as social (S) gliding. Beside the polarly localized TFP, the fibril or extracellular polysaccharide (EPS) is also required for S-motility to function. It is proposed that S-motility, along with the related bacterial twitching motility …