Characterization of Mce4A protein of Mycobacterium tuberculosis: role in invasion and survival.

Abstract:

BACKGROUND:The mce4 operon is one of the four homologues of mammalian cell entry (mce) operons of Mycobacterium tuberculosis. The mce4A (Rv3499c) gene within this operon is homologous to mce1A (Rv0169), that has a role in host cell invasion by M. tuberculosis. Our earlier reports show that mce4 operon is expressed during the stationary phase of growth of the bacillus in culture and during the course of infection in mammalian hosts. M. tuberculosis carrying mutation in mce4 operon shows growth defect and reduced survival in infected mice. However, the intracellular localization of Mce4A protein and its direct role in cell entry or survival of the bacillus has not been demonstrated so far. RESULTS:By transmission electron microscopy we have demonstrated that recombinant Mce4A protein facilitates the invasion of non-pathogenic strain of E. coli into non-phagocytic HeLa cells. We observe that mce4A gene has a role comparable to mce1A in the survival of recombinant E. coli in human macrophages. Using antibodies raised against Mce4A protein, we show that the protein is localized in the cell wall fraction of M. tuberculosis H37Rv stationary phase culture only. CONCLUSION:Mce4A protein is expressed during the stationary phase of broth culture and localizes in the cell wall fraction of M. tuberculosis. Mce4A protein expressed in non-pathogenic E. coli enables it to enter and survive within HeLa cells and the macrophages. As Mce4A protein is expressed during later phase of mycobacterial growth, our results raise the possibility of it playing a role in maintenance of persistent tubercular infection.

journal_name

BMC Microbiol

journal_title

BMC microbiology

authors

Saini NK,Sharma M,Chandolia A,Pasricha R,Brahmachari V,Bose M

doi

10.1186/1471-2180-8-200

subject

Has Abstract

pub_date

2008-11-19 00:00:00

pages

200

issn

1471-2180

pii

1471-2180-8-200

journal_volume

8

pub_type

杂志文章
  • Safety evaluation of the antimicrobial peptide bovicin HC5 orally administered to a murine model.

    abstract:BACKGROUND:Bovicin HC5 is an antimicrobial peptide that shows a broad spectrum of activity and potential for biotechnological and therapeutic applications. To gain insight about the safety of bovicin HC5 application, the histological and immunostimulatory effects of orally administrated bovicin HC5 to BALB/c mice were ...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-13-69

    authors: Paiva AD,Fernandes KM,Dias RS,Rocha Ados S,Oliveira LL,Neves CA,Paula SO,Mantovani HC

    更新日期:2013-03-27 00:00:00

  • CCL5 regulation of mucosal chlamydial immunity and infection.

    abstract:BACKGROUND:Following genital chlamydial infection, an early T helper type 1 (Th1)-associated immune response precedes the activation and recruitment of specific Th1 cells bearing distinct chemokine receptors, subsequently leading to the clearance of Chlamydia. We have shown that CCR5, a receptor for CCL5, is crucial fo...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-8-136

    authors: Sakthivel SK,Singh UP,Singh S,Taub DD,Igietseme JU,Lillard JW Jr

    更新日期:2008-08-13 00:00:00

  • A blue native-PAGE analysis of membrane protein complexes in Clostridium thermocellum.

    abstract:BACKGROUND:Clostridium thermocellum is a Gram-positive thermophilic anaerobic bacterium with the unusual capacity to convert cellulosic biomass into ethanol and hydrogen. Identification and characterization of protein complexes in C. thermocellum are important toward understanding its metabolism and physiology. RESULT...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-11-22

    authors: Peng Y,Luo Y,Yu T,Xu X,Fan K,Zhao Y,Yang K

    更新日期:2011-01-26 00:00:00

  • atpE gene as a new useful specific molecular target to quantify Mycobacterium in environmental samples.

    abstract:BACKGROUND:The environment is the likely source of many pathogenic mycobacterial species but detection of mycobacteria by bacteriological tools is generally difficult and time-consuming. Consequently, several molecular targets based on the sequences of housekeeping genes, non-functional RNA and structural ribosomal RNA...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-13-277

    authors: Radomski N,Roguet A,Lucas FS,Veyrier FJ,Cambau E,Accrombessi H,Moilleron R,Behr MA,Moulin L

    更新日期:2013-12-03 00:00:00

  • Impacts of a novel defensive symbiosis on the nematode host microbiome.

    abstract:BACKGROUND:Bacteria adapted to live within animals can protect their hosts against harmful infections. Beyond antagonism with pathogens, a 'defensive' bacterial symbiont could engage in additional interactions with other colonizing micro-organisms. A single bacterium might thus have cascading ecological impacts on the ...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-020-01845-0

    authors: Dahan D,Preston GM,Sealey J,King KC

    更新日期:2020-06-15 00:00:00

  • Characterization of alpha-isopropylmalate synthases containing different copy numbers of tandem repeats in Mycobacterium tuberculosis.

    abstract:BACKGROUND:Alpha-isopropylmalate synthase (alpha-IPMS) is the key enzyme that catalyzes the first committed step in the leucine biosynthetic pathway. The gene encoding alpha-IPMS in Mycobacterium tuberculosis, leuA, is polymorphic due to the insertion of 57-bp repeat units referred to as Variable Number of Tandem Repea...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-9-122

    authors: Yindeeyoungyeon W,Likitvivatanavong S,Palittapongarnpim P

    更新日期:2009-06-09 00:00:00

  • msaABCR operon is involved in persister cell formation in Staphylococcus aureus.

    abstract:BACKGROUND:Persister cells comprise a phenotypic variant that shows extreme antibiotic tolerance resulting in treatment failures of bacterial infections. While this phenomenon has posed a great threat in public health, mechanisms underlying their formation in Staphylococcus aureus remain largely unknown. Increasing evi...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-017-1129-9

    authors: Sahukhal GS,Pandey S,Elasri MO

    更新日期:2017-11-22 00:00:00

  • Synergistic effects of baicalein with cefotaxime against Klebsiella pneumoniae through inhibiting CTX-M-1 gene expression.

    abstract:BACKGROUND:Generation of extended- spectrum β- lactamases is one of the major mechanisms by which clinical Klebsiella pneumoniae develop resistance to antibiotics. Combined antibiotics prove to be a relatively effective method of controlling such resistant strains. Some of Chinese herbal active ingredients are known to...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-016-0797-1

    authors: Cai W,Fu Y,Zhang W,Chen X,Zhao J,Song W,Li Y,Huang Y,Wu Z,Sun R,Dong C,Zhang F

    更新日期:2016-08-08 00:00:00

  • Pilicides inhibit the FGL chaperone/usher assisted biogenesis of the Dr fimbrial polyadhesin from uropathogenic Escherichia coli.

    abstract:BACKGROUND:The global spread of bacterial resistance has given rise to a growing interest in new anti-bacterial agents with a new strategy of action. Pilicides are derivatives of ring-fused 2-pyridones which block the formation of the pili/fimbriae crucial to bacterial pathogenesis. They impair by means of a chaperone-...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-13-131

    authors: Piatek R,Zalewska-Piatek B,Dzierzbicka K,Makowiec S,Pilipczuk J,Szemiako K,Cyranka-Czaja A,Wojciechowski M

    更新日期:2013-06-12 00:00:00

  • Domain swapping reveals that the N-terminal domain of the sensor kinase KdpD in Escherichia coli is important for signaling.

    abstract:BACKGROUND:The KdpD/KdpE two-component system of Escherichia coli regulates expression of the kdpFABC operon encoding the high affinity K+ transport system KdpFABC. The input domain of KdpD comprises a domain that belongs to the family of universal stress proteins (Usp). It has been previously demonstrated that UspC bi...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-9-133

    authors: Heermann R,Lippert ML,Jung K

    更新日期:2009-07-09 00:00:00

  • Young «oil site» of the Uzon Caldera as a habitat for unique microbial life.

    abstract:BACKGROUND:The Uzon Caldera is one of the places on our planet with unique geological, ecological, and microbiological characteristics. Uzon oil is the youngest on Earth. Uzon oil has unique composition, with low proportion of heavy fractions and relatively high content of saturated hydrocarbons. Microbial communities ...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-020-02012-1

    authors: Peltek SE,Bryanskaya AV,Uvarova YE,Rozanov AS,Ivanisenko TV,Ivanisenko VA,Lazareva EV,Saik OV,Efimov VM,Zhmodik SM,Taran OP,Slynko NM,Shekhovtsov SV,Parmon VN,Dobretsov NL,Kolchanov NA

    更新日期:2020-11-24 00:00:00

  • Detection of Burkholderia pseudomallei O-antigen serotypes in near-neighbor species.

    abstract:BACKGROUND:Burkholderia pseudomallei is the etiological agent of melioidosis and a CDC category B select agent with no available effective vaccine. Previous immunizations in mice have utilized the lipopolysaccharide (LPS) as a potential vaccine target because it is known as one of the most important antigenic epitopes ...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-12-250

    authors: Stone JK,Mayo M,Grasso SA,Ginther JL,Warrington SD,Allender CJ,Doyle A,Georgia S,Kaestli M,Broomall SM,Karavis MA,Insalaco JM,Hubbard KS,McNew LA,Gibbons HS,Currie BJ,Keim P,Tuanyok A

    更新日期:2012-11-05 00:00:00

  • CtcS, a MarR family regulator, regulates chlortetracycline biosynthesis.

    abstract:BACKGROUND:Chlortetracycline (CTC) is one of the commercially important tetracyclines (TCs) family product and is mainly produced by Streptomyces. CTC is still in a great demand due to its broad-spectrum activity against pathogens. Engineering transcriptional control allows the cell to allocate its valuable resources t...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-019-1670-9

    authors: Kong L,Liu J,Zheng X,Deng Z,You D

    更新日期:2019-12-10 00:00:00

  • Application of hierarchical oligonucleotide primer extension (HOPE) to assess relative abundances of ammonia- and nitrite-oxidizing bacteria.

    abstract:BACKGROUND:Establishing an optimal proportion of nitrifying microbial populations, including ammonia-oxidizing bacteria (AOB), nitrite-oxidizing bacteria (NOB), complete nitrite oxidizers (comammox) and ammonia-oxidizing archaea (AOA), is important for ensuring the efficiency of nitrification in water treatment systems...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-017-0998-2

    authors: Scarascia G,Cheng H,Harb M,Hong PY

    更新日期:2017-04-04 00:00:00

  • Analysis and comparison of the pan-genomic properties of sixteen well-characterized bacterial genera.

    abstract:BACKGROUND:The increasing availability of whole genome sequences allows the gene or protein content of different organisms to be compared, leading to burgeoning interest in the relatively new subfield of pan-genomics. However, while several studies have analyzed protein content relationships in specific groups of bacte...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-10-258

    authors: Trost B,Haakensen M,Pittet V,Ziola B,Kusalik A

    更新日期:2010-10-13 00:00:00

  • Brucella melitensis VjbR and C12-HSL regulons: contributions of the N-dodecanoyl homoserine lactone signaling molecule and LuxR homologue VjbR to gene expression.

    abstract:BACKGROUND:Quorum sensing is a communication system that regulates gene expression in response to population density and often regulates virulence determinants. Deletion of the luxR homologue vjbR highly attenuates intracellular survival of Brucella melitensis and has been interpreted to be an indication of a role for ...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-10-167

    authors: Weeks JN,Galindo CL,Drake KL,Adams GL,Garner HR,Ficht TA

    更新日期:2010-06-08 00:00:00

  • Functional significance of nuclear export and mRNA binding of meiotic regulator Spo5 in fission yeast.

    abstract:BACKGROUND:Meiotic cells undergo two rounds of nuclear division and generate gametes. Previous studies have indicated that a number of transcription factors modulate the transcriptome in successive waves during meiosis and spore formation in fission yeast. However, the mechanisms underlying the post-transcriptional reg...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-14-188

    authors: Togashi N,Yamashita A,Sato M,Yamamoto M

    更新日期:2014-07-15 00:00:00

  • Modulations in the offspring gut microbiome are refractory to postnatal synbiotic supplementation among juvenile primates.

    abstract:BACKGROUND:We and others have previously shown that alterations in the mammalian gut microbiome are associated with diet, notably early life exposure to a maternal high fat diet (HFD). Here, we aimed to further these studies by examining alterations in the gut microbiome of juvenile Japanese macaques (Macaca fuscata) t...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-018-1169-9

    authors: Pace RM,Prince AL,Ma J,Belfort BDW,Harvey AS,Hu M,Baquero K,Blundell P,Takahashi D,Dean T,Kievit P,Sullivan EL,Friedman JE,Grove K,Aagaard KM

    更新日期:2018-04-05 00:00:00

  • Lethal photosensitization of wound-associated microbes using indocyanine green and near-infrared light.

    abstract:BACKGROUND:The increase in resistance to antibiotics among disease-causing bacteria necessitates the development of alternative antimicrobial approaches such as the use of light-activated antimicrobial agents (LAAAs). Light of an appropriate wavelength activates the LAAA to produce cytotoxic species which can then caus...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-8-111

    authors: Omar GS,Wilson M,Nair SP

    更新日期:2008-07-01 00:00:00

  • Persistent presence of outer membrane epitopes during short- and long-term starvation of five Legionella pneumophila strains.

    abstract:BACKGROUND:Legionella pneumophila, the causative agent of Legionnaire's disease, may enter a viable but non-culturable (VBNC) state triggered by environmental stress conditions. Specific outer-membrane epitopes of L. pneumophila are used in many diagnostic applications and some of them are linked to important virulence...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-018-1220-x

    authors: Schrammel B,Petzold M,Cervero-Aragó S,Sommer R,Lück C,Kirschner A

    更新日期:2018-07-17 00:00:00

  • Correction to: Genetic characterization of Bacillus anthracis in Guizhou Province, Southwest of China.

    abstract:ERRATUM:Upon publication of the original article (1) it was highlighted by the authors that a grant awarded to support the research work of the study was missed in the acknowledgements. It should also be acknowledged that the grant titled "Genotyping and Molecular Epidemiological Characteristic of Bacillus anthracis in...

    journal_title:BMC microbiology

    pub_type: 杂志文章,已发布勘误

    doi:10.1186/s12866-018-1172-1

    authors: Li S,Ma Q,Chen H,Wang D,Liu Y,Wei X,You L,Yao G,Tian K,Tang G

    更新日期:2018-04-12 00:00:00

  • The influence of acetyl phosphate on DspA signalling in the Cyanobacterium Synechocystis sp. PCC6803.

    abstract:BACKGROUND:The dspA (hik33) gene, coding for a putative sensory histidine kinase, is conserved in plastids (ycf26) and cyanobacteria. It has been linked with a number of different stress responses in cyanobacteria. RESULTS:We constructed an insertional mutant of dspA (ycf26) in Synechocystis 6803. We found little phen...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-5-47

    authors: Morrison SS,Mullineaux CW,Ashby MK

    更新日期:2005-08-02 00:00:00

  • Occurrence and enumeration of Campylobacter spp. during the processing of Chilean broilers.

    abstract:BACKGROUND:Thermotolerant Campylobacter is among the more prevalent bacterial pathogens that cause foodborne diseases. This study aimed at evaluating the occurrence of thermotolerant Campylobacter contamination in chicken carcasses and processing plant stations (chilling water, scalding water, defeathering machinery, e...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-9-94

    authors: Figueroa G,Troncoso M,López C,Rivas P,Toro M

    更新日期:2009-05-15 00:00:00

  • Doxycycline-regulated gene expression in the opportunistic fungal pathogen Aspergillus fumigatus.

    abstract:BACKGROUND:Although Aspergillus fumigatus is an important human fungal pathogen there are few expression systems available to study the contribution of specific genes to the growth and virulence of this opportunistic mould. Regulatable promoter systems based upon prokaryotic regulatory elements in the E. coli tetracycl...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-5-1

    authors: Vogt K,Bhabhra R,Rhodes JC,Askew DS

    更新日期:2005-01-13 00:00:00

  • Stability and resilience of the intestinal microbiota in children in daycare - a 12 month cohort study.

    abstract:BACKGROUND:We performed a 12-month cohort study of the stability and resilience of the intestinal microbiota of healthy children in daycare in Denmark in relation to diarrheal events and exposure to known risk factors for gastrointestinal health such as travelling and antibiotic use. In addition, we analyzed how gut mi...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-018-1367-5

    authors: Mortensen MS,Hebbelstrup Jensen B,Williams J,Brejnrod AD,O'Brien Andersen L,Röser D,Andreassen BU,Petersen AM,Stensvold CR,Sørensen SJ,Krogfelt KA

    更新日期:2018-12-22 00:00:00

  • Pyviko: an automated Python tool to design gene knockouts in complex viruses with overlapping genes.

    abstract:BACKGROUND:Gene knockouts are a common tool used to study gene function in various organisms. However, designing gene knockouts is complicated in viruses, which frequently contain sequences that code for multiple overlapping genes. Designing mutants that can be traced by the creation of new or elimination of existing r...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-016-0920-3

    authors: Taylor LJ,Strebel K

    更新日期:2017-01-07 00:00:00

  • Microbial iron management mechanisms in extremely acidic environments: comparative genomics evidence for diversity and versatility.

    abstract:BACKGROUND:Iron is an essential nutrient but can be toxic at high intracellular concentrations and organisms have evolved tightly regulated mechanisms for iron uptake and homeostasis. Information on iron management mechanisms is available for organisms living at circumneutral pH. However, very little is known about how...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/1471-2180-8-203

    authors: Osorio H,Martínez V,Nieto PA,Holmes DS,Quatrini R

    更新日期:2008-11-24 00:00:00

  • Genotyping and phylogenetic placement of Bacillus anthracis isolates from Finland, a country with rare anthrax cases.

    abstract:BACKGROUND:Anthrax, the zoonotic disease caused by the gram-positive bacterium Bacillus anthracis, is nowadays rare in northern parts of Europe including Finland and Scandinavia. Only two minor outbreaks of anthrax in 1988 and in 2004 and one sporadic infection in 2008 have been detected in animals in Finland since the...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-018-1250-4

    authors: Lienemann T,Beyer W,Pelkola K,Rossow H,Rehn A,Antwerpen M,Grass G

    更新日期:2018-09-03 00:00:00

  • Ribosomal subunit protein typing using matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) for the identification and discrimination of Aspergillus species.

    abstract:BACKGROUND:Accurate identification of Aspergillus species is a very important subject. Mass spectral fingerprinting using matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) is generally employed for the rapid identification of fungal isolates. However, the results are based on s...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-017-1009-3

    authors: Nakamura S,Sato H,Tanaka R,Kusuya Y,Takahashi H,Yaguchi T

    更新日期:2017-04-26 00:00:00

  • Comparative transcriptomic and proteomic analyses reveal upregulated expression of virulence and iron transport factors of Aeromonas hydrophila under iron limitation.

    abstract:BACKGROUND:Iron plays important roles in the growth, reproduction and pathogenicity of Aeromonas hydrophila. In this study, we detected and compared the mRNA and protein expression profiles of A. hydrophila under normal and iron restricted medium with 200 μM 2,2-Dipyridyl using RNA Sequencing (RNA-seq) and isobaric tag...

    journal_title:BMC microbiology

    pub_type: 杂志文章

    doi:10.1186/s12866-018-1178-8

    authors: Teng T,Xi B,Chen K,Pan L,Xie J,Xu P

    更新日期:2018-06-04 00:00:00