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Bini Mathew, Judith Varady Hobrath, Larry Ross, Michele C Connelly, Hava Lofton, Malini Rajagopalan, R Kiplin Guy, Robert C Reynolds
A variety of commercial analogs and a newer series of Sulindac derivatives were screened for inhibition of M. tuberculosis (Mtb) in vitro and specifically as inhibitors of the essential mycobacterial tubulin homolog, FtsZ. Due to the ease of preparing diverse analogs and a favorable in vivo pharmacokinetic and toxicity profile of a representative analog, the Sulindac scaffold may be useful for further development against Mtb with respect to in vitro bacterial growth inhibition and selective activity for Mtb FtsZ versus mammalian tubulin...
2016: PloS One
Lidia Araújo-Bazán, Laura B Ruiz-Avila, David Andreu, Sonia Huecas, José M Andreu
Cell division protein FtsZ is the organizer of the cytokinetic ring in almost all bacteria and a target for the discovery of new antibacterial agents that are needed to counter widespread antibiotic resistance. Bacterial cytological profiling, using quantitative microscopy, is a powerful approach for identifying the mechanism of action of antibacterial molecules affecting different cellular pathways. We have determined the cytological profile on Bacillus subtilis cells of a selection of small molecule inhibitors targeting FtsZ on different binding sites...
2016: Frontiers in Microbiology
Alicia Sánchez-Gorostiaga, Pilar Palacios, Rocío Martínez-Arteaga, Manuel Sánchez, Mercedes Casanova, Miguel Vicente
: When deprived of FtsZ, Escherichia coli cells (VIP205) grown in liquid form long nonseptated filaments due to their inability to assemble an FtsZ ring and their failure to recruit subsequent divisome components. These filaments fail to produce colonies on solid medium, in which synthesis of FtsZ is induced, upon being diluted by a factor greater than 4. However, once the initial FtsZ levels are recovered in liquid culture, they resume division, and their plating efficiency returns to normal...
October 11, 2016: MBio
Anna Klöckner, Henrike Bühl, Patrick Viollier, Beate Henrichfreise
The evolutionary separated Gram-negative Chlamydiales show a biphasic life cycle and replicate exclusively within eukaryotic host cells. Members of the genus Chlamydia are responsible for many acute and chronic diseases in humans, and Chlamydia-related bacteria are emerging pathogens. We revisit past efforts to detect cell wall material in Chlamydia and Chlamydia-related bacteria in the context of recent breakthroughs in elucidating the underlying cellular and molecular mechanisms of the chlamydial cell wall biosynthesis...
September 21, 2016: Current Topics in Microbiology and Immunology
Begoña Monterroso, Silvia Zorrilla, Marta Sobrinos-Sanguino, Christine D Keating, Germán Rivas
The influence of membrane-free microcompartments resulting from crowding-induced liquid/liquid phase separation (LLPS) on the dynamic spatial organization of FtsZ, the main component of the bacterial division machinery, has been studied using several LLPS systems. The GTP-dependent assembly cycle of FtsZ is thought to be crucial for the formation of the septal ring, which is highly regulated in time and space. We found that FtsZ accumulates in one of the phases and/or at the interface, depending on the system composition and on the oligomerization state of the protein...
October 11, 2016: Scientific Reports
Nikolaus Leisch, Nika Pende, Philipp M Weber, Harald R Gruber-Vodicka, Jolanda Verheul, Norbert O E Vischer, Sophie S Abby, Benedikt Geier, Tanneke den Blaauwen, Silvia Bulgheresi
The reproduction mode of uncultivable microorganisms deserves investigation as it can largely diverge from conventional transverse binary fission. Here, we show that the rod-shaped gammaproteobacterium thriving on the surface of the Robbea hypermnestra nematode divides by FtsZ-based, non-synchronous invagination of its poles-that is, the host-attached and fimbriae-rich pole invaginates earlier than the distal one. We conclude that, in a naturally occurring animal symbiont, binary fission is host-oriented and does not require native FtsZ to polymerize into a ring at any septation stage...
October 10, 2016: Nature Microbiology
Rodrigo Rojas, Claudio D Miranda, Javier Santander, Jaime Romero
The VPAP30 strain was isolated as the highly predominant bacteria from an episode of massive larval mortality occurring in a commercial culture of the Chilean scallop Argopecten purpuratus. The main aims of this study were, to characterize and identify the pathogenic strain using biochemical and molecular methods to demonstrate its pathogenic activity on scallop larvae, to characterize its pathogenic properties and to describe the chronology of this pathology. The pathogenic strain was identified as Vibrio tubiashii based on its phenotypic properties and the sequence analysis of its 16S rRNA and housekeeping genes (ftsZ, gapA, gyrB, mreB, pyrH, recA, rpoA and topA)...
2016: Frontiers in Microbiology
Dina Elhadi, Li Lv, Xiao-Ran Jiang, Hong Wu, Guo-Qiang Chen
Microbial morphology engineering has recently become interesting for biotechnology. Genes ftsZ and mreB encoding proteins of bacterial fission ring and skeletons, respectively, are essential for cell growth, they both are the most important genes keeping the bacterial shapes including the cell length and width, respectively. Clustered regularly interspaced short palindromic repeats interference, abbreviated as CRISPRi, was for the first time used in this study to regulate expression intensities of ftsZ or/and mreB in E...
September 28, 2016: Metabolic Engineering
Javier Dubert, Sabela Balboa, María Regueira, Adrián González-Castillo, Bruno Gómez-Gil, Jesús L Romalde
Seven isolates were obtained from different culture stages of carpet shell clam (Ruditapes decussatus) reared in a bivalve hatchery (Galicia, NW Spain). Three groups were differentiated by genotyping techniques and phenotypic profiles and representative trains were selected to further taxonomic studies. These strains were studied by a polyphasic approach and in basis of the phylogenetic analysis based on concatenated sequences of the five housekeeping genes ftsZ, gyrB, pyrH, recA and rpoA formed a tight group into the Mediterranei clade of the genus Vibrio...
September 20, 2016: Systematic and Applied Microbiology
Hemendra Pal Singh Dhaked, Anusri Bhattacharya, Saroj Yadav, Sarath Chandra Dantu, Ashutosh Kumar, Dulal Panda
FtsZ monomers assemble to form a dynamic Z-ring at the midcell position in bacteria that coordinates bacterial cell division. Antibacterial agents plumbagin and SB-RA-2001 were found to bind to FtsZ and to inhibit Z-ring formation in bacteria. Docking analysis indicated similar binding regions for these two inhibitors on FtsZ, and residue R191 was involved in the binding interaction with both compounds. In this work, the importance of R191 in FtsZ assembly and in bacterial cell division was analyzed. R191A-FtsZ exhibited significantly poorer polymerization ability...
October 11, 2016: Biochemistry
Frederique B Schulte Fischedick, Matthew J Stuckey, Alvaro Aguilar-Setién, Hayde Moreno-Sandoval, Guillermo Galvez-Romero, Mónica Salas-Rojas, Nidia Arechiga-Ceballos, Paul A M Overgaauw, Rickie W Kasten, Bruno B Chomel
Bartonella species are highly endemic among wild rodents in many parts of the world. Blood and/or blood clot cultures from 38 rodents, including 27 Yucatan deer mouse (Peromyscus yucatanicus), 7 Gaumer's spiny pocket mouse (Heteromys gaumeri), 2 black rats (Rattus rattus) and 2 big-eared climbing rats (Ototylomys phyllotis) captured near Merida, Yucatan, Mexico, led to the isolation in 3-4 days of small gram-negative bacilli, which were identified as Bartonella spp. based on colony morphology. DNA extraction and PCR testing were also performed from heart samples of 35 of these 38 rodents...
October 2016: Vector Borne and Zoonotic Diseases
Jie Xiao, Erin D Goley
In most bacteria, cell division relies on the functions of an essential protein, FtsZ. FtsZ polymerizes at the future division site to form a ring-like structure, termed the Z-ring, that serves as a scaffold to recruit all other division proteins, and possibly generates force to constrict the cell. The scaffolding function of the Z-ring is well established, but the force generating function has recently been called into question. Additionally, new findings have demonstrated that the Z-ring is more directly linked to cell wall metabolism than simply recruiting enzymes to the division site...
September 9, 2016: Current Opinion in Microbiology
Daniel O Daley, Ulf Skoglund, Bill Söderström
The source of constriction required for division of a bacterial cell remains enigmatic. FtsZ is widely believed to be a key player, because in vitro experiments indicate that it can deform liposomes when membrane tethered. However in vivo evidence for such a role has remained elusive as it has been challenging to distinguish the contribution of FtsZ from that of peptidoglycan-ingrowth. To differentiate between these two possibilities we studied the early stages of division in Escherichia coli, when FtsZ is present at the division site but peptidoglycan synthesizing enzymes such as FtsI and FtsN are not...
2016: Scientific Reports
Ana R Pereira, Jen Hsin, Ewa Król, Andreia C Tavares, Pierre Flores, Egbert Hoiczyk, Natalie Ng, Alex Dajkovic, Yves V Brun, Michael S VanNieuwenhze, Terry Roemer, Rut Carballido-Lopez, Dirk-Jan Scheffers, Kerwyn Casey Huang, Mariana G Pinho
UNLABELLED: A mechanistic understanding of the determination and maintenance of the simplest bacterial cell shape, a sphere, remains elusive compared with that of more complex shapes. Cocci seem to lack a dedicated elongation machinery, and a spherical shape has been considered an evolutionary dead-end morphology, as a transition from a spherical to a rod-like shape has never been observed in bacteria. Here we show that a Staphylococcus aureus mutant (M5) expressing the ftsZ(G193D) allele exhibits elongated cells...
2016: MBio
Olga Jeske, Frank Surup, Marcel Ketteniß, Patrick Rast, Birthe Förster, Mareike Jogler, Joachim Wink, Christian Jogler
Planctomycetes are conspicuous, ubiquitous, environmentally important bacteria. They can attach to various surfaces in aquatic habitats and form biofilms. Their unique FtsZ-independent budding cell division mechanism is associated with slow growth and doubling times from 6 h up to 1 month. Despite this putative disadvantage in the struggle to colonize surfaces, Planctomycetes are frequently associated with aquatic phototrophic organisms such as diatoms, cyanobacteria or kelp, whereby Planctomycetes can account for up to 50% of the biofilm-forming bacterial population...
2016: Frontiers in Microbiology
Romain Mercier, Yoshikazu Kawai, Jeff Errington
The peptidoglycan cell wall is a major protective external sheath in bacteria and a key target for antibiotics(1). Peptidoglycan is present in virtually all bacteria, suggesting that it was probably present in the last bacterial common ancestor(2). Cell wall expansion is orchestrated by cytoskeletal proteins related to actin (MreB) and tubulin (FtsZ)(3). FtsZ is a key essential player in a highly organized division machine that directs an invaginating annulus of cell wall peptidoglycan. The recent discovery that cell-wall-less bacteria (L-forms) can grow and divide independently of FtsZ(4,5), provided a means of generating an ftsZ null mutant of Escherichia coli...
2016: Nature Microbiology
Gunjan Kumar Saurav, Guisuibou Daimei, Vipin Singh Rana, Sonam Popli, Raman Rajagopal
Thrips palmi Karny is a globally distributed polyphagous agricultural pest. It causes huge economic loss by its biological behaviors like feeding, reproduction and transmission of tospoviruses. Since T. palmi shows close morphological similarities with other thrips species, we employed mitochondrial cytochrome oxidase 1 (mtCO1) gene as a molecular marker. BLAST analysis of this sequence helped us to identify the collected specimen as T. palmi. We observed the female to male ratio of about 3:1 from collected samples and suspected the presence of Wolbachia...
June 2016: Indian Journal of Microbiology
Elisa Galli, Mickaël Poidevin, Romain Le Bars, Jean-Michel Desfontaines, Leila Muresan, Evelyne Paly, Yoshiharu Yamaichi, François-Xavier Barre
Cell division must be coordinated with chromosome replication and segregation to ensure the faithful transmission of genetic information during proliferation. In most bacteria, assembly of the division apparatus, the divisome, starts with the polymerization of a tubulin homologue, FtsZ, into a ring-like structure at mid-cell, the Z-ring(1). It typically occurs at half of the cell cycle when most of the replication and segregation cycle of the unique chromosome they generally harbour is achieved(2). The chromosome itself participates in the regulation of cell division, at least in part because it serves as a scaffold to position FtsZ polymerization antagonists(3)...
2016: Nature Microbiology
Javier Dubert, Jesús L Romalde, Edward J Spinard, David R Nelson, Marta Gomez-Chiarri, Juan L Barja
Orientalis clade has a relevant significance for bivalve aquaculture since it includes the pathogens V. bivalvicida, V. tubiashii subsp. tubiashii and V. tubiashii subsp. europaeus. However, the previous taxonomic description of the subspecies of V. tubiashii shows some incongruities that should be emended. In the genomic age, the comparison between genome assemblies is the key to clarify the taxonomic position of both subspecies. With this purpose, we have tested the ability of MLSA based on eight housekeeping gene sequences (gapA, gyrB, ftsZ, mreB, pyrH, recA, rpoA and topA), different in silico genome to genome comparisons, chemotaxonomic features and phenotypic traits to reclassify the subspecies Vibrio tubiashii subsp...
August 18, 2016: International Journal of Systematic and Evolutionary Microbiology
Sridevi Duggirala, John Victor Napoleon, Rakesh P Nankar, V Senu Adeeba, Muraleedharan K Manheri, Mukesh Doble
The dual effect of FtsZ inhibition and oxidative stress by a group of 1,2-dihydroquinolines that culminate in bactericidal effect on mycobacterium strains is demonstrated. They inhibited the non-pathogenic Mycobacterium smegmatis mc(2) 155 with MIC as low as 0.9 μg/mL and induced filamentation. Detailed studies revealed their ability to inhibit polymerization and GTPase activity of MtbFtsZ (Mycobacterial filamentous temperature sensitive Z) with an IC50 value of ∼40 μM. In addition to such target specific effects, these compounds exerted a global cellular effect by causing redox-imbalance that was evident from overproduction of ROS in treated cells...
November 10, 2016: European Journal of Medicinal Chemistry
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