Abstract:
:The ubiquitous human commensal Escherichia coli has been well investigated through its model representative E. coli K-12. In this work, we initially characterized E. coli Fec10, a recently isolated human commensal strain of phylogroup A/sequence type ST10. Compared to E. coli K-12, the 4.88 Mbp Fec10 genome is characterized by distinct single-nucleotide polymorphisms and acquisition of genomic islands. In addition, E. coli Fec10 possesses a 155.86 kbp IncY plasmid, a composite element based on phage P1. pFec10 harbours multiple cargo genes such as coding for a tetrathionate reductase and its corresponding regulatory two-component system. Among the cargo genes is also the Transmissible Locus of Protein Quality Control (TLPQC), which mediates tolerance to lethal temperatures in bacteria. The disaggregase ClpGGI of TLPQC constitutes a major determinant of the thermotolerance of E. coli Fec10. We confirmed stand-alone disaggregation activity, but observed distinct biochemical characteristics of ClpGGI-Fec10 compared to the nearly identical Pseudomonas aeruginosa ClpGGI-SG17M. Furthermore, we noted a unique contribution of ClpGGI-Fec10 to the exquisite thermotolerance of E. coli Fec10, suggesting functional differences between both disaggregases in vivo. Detection of thermotolerance in 10% of human commensal E. coli isolates hints to the successful establishment of food-borne heat-resistant strains in the human gut.
journal_name
Mol Microbioljournal_title
Molecular microbiologyauthors
Kamal SM,Cimdins-Ahne A,Lee C,Li F,Martín-Rodríguez AJ,Seferbekova Z,Afasizhev R,Wami HT,Katikaridis P,Meins L,Lünsdorf H,Dobrindt U,Mogk A,Römling Udoi
10.1111/mmi.14614subject
Has Abstractpub_date
2020-09-28 00:00:00eissn
0950-382Xissn
1365-2958pub_type
杂志文章abstract::A decline in our ability to successfully treat patients with malaria infections of the parasitic protozoan Plasmodium falciparum with cheap quinoline drugs has led to a huge escalation in morbidity and mortality in recent years. Many approaches have been taken, including classical genetics, reverse genetics and molecu...
journal_title:Molecular microbiology
pub_type: 评论,杂志文章,评审
doi:10.1111/j.1365-2958.2005.04748.x
更新日期:2005-08-01 00:00:00
abstract::Pseudomonas aeruginosa can express two distinct forms of lipopolysaccharide (LPS), called A-band and B-band. As an attempt to understand the molecular biology of the synthesis and regulation of these LPS antigens, a recombinant plasmid, pFV3, containing genes for A-band expression was isolated previously. In the prese...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1993.tb01620.x
更新日期:1993-05-01 00:00:00
abstract::The glycopeptide antibiotic-producing bacterium, Streptomyces toyocaensis NRRL 15009, has proteins phosphorylated on Ser, Thr, Tyr and His, implying the presence of a battery of associated kinases. We have identified the Ser/Thr protein kinase gene fragments stoPK-1, stoPK-2, stoPK-3 and stoPK-4 from S. toyocaensis NR...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.2002.02879.x
更新日期:2002-04-01 00:00:00
abstract::In eukaryotes, frataxin deficiency (FXN) causes severe phenotypes including loss of iron-sulfur (Fe-S) cluster protein activity, accumulation of mitochondrial iron and leads to the neurodegenerative disease Friedreich's ataxia. In contrast, in prokaryotes, deficiency in the FXN homolog, CyaY, was reported not to cause...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.12888
更新日期:2015-02-01 00:00:00
abstract::The majority of bacterial genomes encode a high number of two-component systems controlling gene expression in response to a variety of different stimuli. The Gram-positive soil bacterium Corynebacterium glutamicum contains two homologous two-component systems (TCS) involved in the haem-dependent regulation of gene ex...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.12633
更新日期:2014-06-01 00:00:00
abstract::The flow of information from the outside to the inside of bacterial cells is largely directed by protein kinases. In addition to histidine/aspartate phosphorelays of two-component response regulators, recent work in Mycobacterium tuberculosis (Mtb) reinforces the idea that phosphorylation on serine (Ser), threonine (T...
journal_title:Molecular microbiology
pub_type: 杂志文章,评审
doi:10.1111/mmi.12747
更新日期:2014-10-01 00:00:00
abstract::Protein kinase G of Mycobacterium tuberculosis has been implicated in virulence and in regulation of glutamate metabolism. Here we show that this kinase undergoes a pattern of autophosphorylation that is distinct from that of other M. tuberculosis protein kinases characterized to date and we identify GarA as a substra...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2008.06489.x
更新日期:2008-12-01 00:00:00
abstract::Bacillus subtilis responds to signals of environmental and metabolic stress by inducing over 40 general stress genes under the control of the sigma B transcription factor. sigma B activity is regulated post-translationally by a multi-component network composed of two coupled partner-switching modules, RsbX-RsbS-RsbT a...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.1997.3631732.x
更新日期:1997-05-01 00:00:00
abstract::Bacteriophages recognize and bind to their hosts with the help of receptor-binding proteins (RBPs) that emanate from the phage particle in the form of fibers or tailspikes. RBPs show a great variability in their shapes, sizes, and location on the particle. Some RBPs are known to depolymerize surface polysaccharides of...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.13710
更新日期:2017-08-01 00:00:00
abstract::The 9.5 kb virB operon is the largest of the six major operons in the Ti plasmid vir region. This operon contains eleven genes, the largest of which is virB4. This gene encodes an 84 kDa protein whose function has not been identified. Its roles in conferring virulence on Agrobacterium tumefaciens and in the T-DNA tran...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1994.tb00338.x
更新日期:1994-02-01 00:00:00
abstract::Numerous eukaryotes have developed specific metabolic traits that are not present in extensively studied model organisms. For instance, the procyclic insect form of Trypanosoma brucei, a parasite responsible for sleeping sickness in its mammalian-specific bloodstream form, metabolizes glucose into excreted succinate a...
journal_title:Molecular microbiology
pub_type: 杂志文章,评审
doi:10.1111/mmi.12990
更新日期:2015-06-01 00:00:00
abstract::NsrR is a nitric oxide (NO)-sensitive transcription repressor that controls NO metabolism in a wide range of bacteria. In Bacillus subtilis, NsrR represses transcription of the nitrite reductase (nasDEF) genes that are under positive control of the ResD-ResE two-component signal transduction system. Derepression is ac...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2010.07407.x
更新日期:2010-12-01 00:00:00
abstract::A mechanistic hypothesis for the origin of the three domains of life is proposed. A population of evolving pre-cells is suggested to have had a membrane of a racemate of chiral lipids that continuously underwent spontaneous symmetry breaking by spatial phase segregation into two enantiomerically enriched membrane doma...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.2003.03267.x
更新日期:2003-01-01 00:00:00
abstract::The chaperone/usher (CU) pathway is a conserved bacterial secretion system that assembles adhesive fibres termed pili or fimbriae. Pilus biogenesis by the CU pathway requires a periplasmic chaperone and an outer membrane (OM) assembly platform termed the usher. The usher catalyses formation of subunit-subunit interact...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2010.07505.x
更新日期:2011-02-01 00:00:00
abstract::The ability of Salmonella enterica serovar Typhimurium to cause disease depends upon the co-ordinated expression of many genes located around the Salmonella chromosome. Specific pathogenicity loci, termed Salmonella pathogenicity islands, have been shown to be crucial for the invasion and survival of Salmonella within...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.2001.02192.x
更新日期:2001-01-01 00:00:00
abstract::We have previously shown that in the human pathogen Neisseria meningitidis group B (MenB) more than 200 genes are regulated in response to growth with iron. Among the Fur-dependent, upregulated genes identified by microarray analysis was a putative operon constituted by three genes, annotated as NMB1436, NMB1437 and N...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2004.04315.x
更新日期:2004-11-01 00:00:00
abstract::FlhD and FlhC are the transcriptional activators of the flagellar regulon. The heterotetrameric complex formed by these two proteins activates the transcription of the class II flagellar genes. The flagellar regulon consists not only of flagellar genes, but also of the chemotactic genes and some receptor proteins. Rec...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.2001.02248.x
更新日期:2001-02-01 00:00:00
abstract::In nitrogen-poor soils, rhizobia elicit nodule formation on legume roots, within which they differentiate into bacteroids that fix atmospheric nitrogen. Protection against reactive oxygen species (ROS) was anticipated to play an important role in Rhizobium-legume symbiosis because nitrogenase is extremely oxygen sensi...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.2000.02178.x
更新日期:2000-11-01 00:00:00
abstract::The plasmid encoded LlaI R/M system from Lactococcus lactis ssp. lactis consists of a bidomain methylase, with close evolutionary ties to type IIS methylases, and a trisubunit restriction complex. Both the methylase and restriction subunits are encoded on a polycistronic 6.9 kb operon. In this study, the 5' end of the...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.1998.00748.x
更新日期:1998-03-01 00:00:00
abstract::Bacterial chemoreceptors cluster into exquisitively sensitive, tunable, highly ordered, polar arrays. While these arrays serve as paradigms of cell signalling in general, it remains unclear what conformational changes transduce signals from the periplasmic tips, where attractants and repellents bind, to the cytoplasmi...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2011.07854.x
更新日期:2011-11-01 00:00:00
abstract::Streptococcus pyogenes interacts with host fibronectin via distinct surface components. One of these components is the Sfbl protein (streptococcal fibronectin-binding protein, now specified as class I), an adhesin that represents a protein family with characteristic features. Here we present the complete structure of ...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1995.mmi_17010137.x
更新日期:1995-07-01 00:00:00
abstract::Engulfment of the forespore by the mother cell is a universal feature of endosporulation. In Bacillus subtilis, the forespore protein SpoIIQ and the mother cell protein SpoIIIAH form a channel, essential for endosporulation, through which the developing spore is nurtured. The two proteins also form a backup system for...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.13311
更新日期:2016-04-01 00:00:00
abstract::The recent emergence of indolent and rapidly fatal drug-resistant strains of Mycobacterium tuberculosis has renewed interest in defining the molecular mechanisms of drug resistance in the tubercle bacilli. In this report, we have examined the mechanism of resistance to streptomycin (Sm) in M. tuberculosis through the ...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1993.tb00924.x
更新日期:1993-11-01 00:00:00
abstract::In this study we show for the first time the intracellular distribution of a K39 kinesin homologue in Leishmania donovani, a medically important parasite of humans. Further, we demonstrated that this motor protein is expressed in both the insect and mammalian developmental forms (i.e. promastigote and amastigotes) of ...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2006.05487.x
更新日期:2007-02-01 00:00:00
abstract::We have identified and characterized three genes, SUT1, SUT2 and SUT3, that encode glucose transporters of the yeast Pichia stipitis. When expressed in a Saccharomyces cerevisiae hxt null mutant strain that is unable to take up monosaccharides, all three proteins restored growth on glucose. Sequencing of the genes rev...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.1999.01224.x
更新日期:1999-02-01 00:00:00
abstract::MreB shares a common prokaryotic ancestor with actin and is present in almost all rod-shaped bacteria. MreB proteins have been implicated in a range of important cell processes, including cell morphogenesis, chromosome segregation and cell polarity. The mreB gene frequently lies at the beginning of a cluster of genes,...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2005.04506.x
更新日期:2005-03-01 00:00:00
abstract::We report here the formation of symbiotic plasmids (pSyms), by genetic recombination between rearranged pSyms, which lack symbiotic information, and resistance plasmids carrying parts of different symbiotic plasmids (R's). This recombination was found to occur both between plasmids derived from different Rhizobium pha...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1991.tb00765.x
更新日期:1991-04-01 00:00:00
abstract::Microcins are a class of ribosomally synthesized antibacterial peptides produced by Enterobacteriaceae and active against closely related bacterial species. While some microcins are active as unmodified peptides, others are heavily modified by dedicated maturation enzymes. Low-molecular-weight microcins from the post-...
journal_title:Molecular microbiology
pub_type: 杂志文章,评审
doi:10.1111/j.1365-2958.2007.05874.x
更新日期:2007-09-01 00:00:00
abstract::Accumulation of stalled ribosomes at the 3' end of mRNA without a stop codon (non-stop mRNA) is supposed to be toxic to bacterial cells. Escherichia coli has at least two distinct systems to rescue such stalled ribosomes: SsrA-dependent trans-translation and ArfA-dependent ribosome rescue. Combination of the ssrA and ...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2011.07607.x
更新日期:2011-05-01 00:00:00
abstract::Helicobacter pylori is a human gastric pathogen that colonizes ∼ 50% of the world's population. It can cause gastritis, gastric or duodenal ulcers and also gastric cancer. The numerous side effects of available treatments and the emergence of antibiotic resistant strains are severe concerns that justify further resear...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.12923
更新日期:2015-04-01 00:00:00