Abstract:
:We have shown previously that some particular mutations in bacteriophage Mu repressor, the frameshift vir mutations, made the protein very sensitive to the Escherichia coli ATP-dependent Clp protease. This enzyme is formed by the association between a protease subunit (ClpP) and an ATPase subunit. ClpA, the best characterized of these ATPases, is not required for the degradation of the mutant Mu repressors. Recently, a new potential ClpP associated ATPase, ClpX, has been described. We show here that this new subunit is required for Mu vir repressor degradation. Moreover, ClpX (but not ClpP) was found to be required for normal Mu replication. Thus ClpX has activities that do not require its association with ClpP. In the pathway of Mu replicative transposition, the block resides beyond the strand transfer reaction, i.e. after the transposition reaction per se is completed, suggesting that ClpX is required for the transition to the formation of the active replication complex at one Mu end. This is a new clear-cut case of the versatile activity of polypeptides that form multi-component ATP-dependent proteases.
journal_name
Mol Microbioljournal_title
Molecular microbiologyauthors
Mhammedi-Alaoui A,Pato M,Gama MJ,Toussaint Adoi
10.1111/j.1365-2958.1994.tb00387.xsubject
Has Abstractpub_date
1994-03-01 00:00:00pages
1109-16issue
6eissn
0950-382Xissn
1365-2958journal_volume
11pub_type
杂志文章abstract::Bacteria retain certain proteins at their cell envelopes by attaching them in a non-covalent manner to peptidoglycan, using specific protein domains, such as the prominent LysM (Lysin Motif) domain. More than 4000 (Pfam PF01476) proteins of both prokaryotes and eukaryotes have been found to contain one or more Lysin M...
journal_title:Molecular microbiology
pub_type: 杂志文章,评审
doi:10.1111/j.1365-2958.2008.06211.x
更新日期:2008-05-01 00:00:00
abstract::In cyanobacteria and chloroplasts, exposure to HL damages the photosynthetic apparatus, especially the D1 subunit of Photosystem II. To avoid chronic photoinhibition, a PSII repair cycle operates to replace damaged PSII subunits with newly synthesised versions. To determine the sub-cellular location of this process, w...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.12940
更新日期:2015-05-01 00:00:00
abstract::Replacement of the amino-terminal 40-amino-acid region of the 588-amino-acid precursor of the membrane-bound penicillin-binding protein 3 (PBP3) by the decapeptide MKGKEFQAWI was carried out by altering the amino-coding end of the ftsI gene. Insertion of the modified gene into a runaway-replication plasmid under the c...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1988.tb00058.x
更新日期:1988-07-01 00:00:00
abstract::In this issue of Molecular Microbiology, Rugarabamu and colleagues investigate the role of rhomboid proteases responsible for adhesin shedding during invasion of the apicomplexan parasite Toxoplasma gondii. This study, together with several other recent publications, raises new questions about the function of these rh...
journal_title:Molecular microbiology
pub_type: 评论,杂志文章
doi:10.1111/mmi.13032
更新日期:2015-07-01 00:00:00
abstract::The var multicopy gene family encodes Plasmodium falciparum erythrocyte membrane protein 1 (PfEMP1) variant antigens, which, through their ability to adhere to a variety of host receptors, are thought to be important virulence factors. The predominant expression of a single cytoadherent PfEMP1 type on an infected red ...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.2003.03505.x
更新日期:2003-06-01 00:00:00
abstract::Pseudomonas aeruginosa releases several extracellular proteins which are secreted via two independent secretion pathways. Alkaline protease (AprA) Is released by its own specific secretion machinery which is an ABC-transporter. Despite sequence similarities between components of ABC-transporters in different bacteria,...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1996.tb02555.x
更新日期:1996-08-01 00:00:00
abstract::The identical partial deep-core structure of Hep alpha 1-3Hep alpha 1-5KDO in Salmonella typhimurium LT2 LPS and Neisseria gonorrhoeae LOS enabled us to isolate a DNA fragment from N. gonorrhoeae that was able to complement the alpha 1,5 LOS heptosyltransferase defect in the S. typhimurium rfaC630 (SA1377) mutant. SDS...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1994.tb01300.x
更新日期:1994-11-01 00:00:00
abstract::The complete nucleotide sequence of the gene for a cell-surface protein antigen (PAc) of Streptococcus mutans MT8148 (serotype c) was determined. The pac gene consisted of 4695 bp and coded for a 170773D protein. The pac gene product contained a putative 38 amino acid signal peptide, resulting in a 166817D mature prot...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1989.tb00215.x
更新日期:1989-05-01 00:00:00
abstract::The outer membrane channel TolC is a key component of multidrug efflux and type I secretion transporters in Escherichia coli. Mutational inactivation of TolC renders cells highly susceptible to antibiotics and leads to defects in secretion of protein toxins. Despite impairment of various transport functions, no growth...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2010.07245.x
更新日期:2010-08-01 00:00:00
abstract::The mechanistic details of the pathogenesis of Chlamydia, an obligate intracellular pathogen of global importance, have eluded scientists due to the scarcity of traditional molecular genetic tools to investigate this organism. Here we report a chemical biology strategy that has uncovered the first essential protease f...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.12306
更新日期:2013-08-01 00:00:00
abstract::The development of new drugs for treating Pneumocystis carinii infections in AIDS patients is hampered by the lack of long-term culture systems, and by our generally limited knowledge of this organism. Recently, however, we observed significant activity of various benzimidazoles against growth of this organism in shor...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1992.tb02204.x
更新日期:1992-11-01 00:00:00
abstract::We have followed the time-dependent transfection of Paramecium cells with a vector containing the gene of green fluorescent protein (GFP) attached to the C-terminus of the PtSERCA1 gene. The outlines of alveolar sacs (ASs) are labelled, as is the endoplasmic reticulum (ER) throughout the cell. When GFP fluorescence is...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.2000.02038.x
更新日期:2000-08-01 00:00:00
abstract::Francisella tularensis are the causative agent of the zoonotic disease, tularaemia. Among four F. tularensis subspecies, ssp. novicida (F. novicida) is pathogenic only for immunocompromised individuals, while all four subspecies are pathogenic for mice. This study utilized proteomic and bioinformatic approaches to ide...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2006.05365.x
更新日期:2006-10-01 00:00:00
abstract::In Aspergillus nidulans, proline can serve both as a carbon and a nitrogen source. The transcription of the prnB gene, encoding the proline transporter, is efficiently repressed only by the simultaneous presence of ammonium and glucose. Thus, repression of this gene demands the activation of the CreA repressor and the...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.2003.03682.x
更新日期:2003-10-01 00:00:00
abstract::Klebsiella pneumoniae is a Gram-negative enterobacterium that has historically been, and currently remains, a significant cause of human disease. It is a frequent cause of urinary tract infections and pneumonia, and subsequent systemic infections can have mortality rates as high as 60%. Despite its clinical significan...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2005.04918.x
更新日期:2005-11-01 00:00:00
abstract::Human gut bifidobacteria rely on ATP-binding cassette (ABC) transporters for oligosaccharide uptake. Multiple oligosaccharide-specific solute-binding protein (SBP) genes are occasionally associated with a single ABC transporter, but the significance of this multiplicity remains unclear. Here, we characterize BlMnBP1 a...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.14257
更新日期:2019-07-01 00:00:00
abstract::Trypanosoma brucei and other African trypanosomes are vector-borne parasites that cause substantial human suffering across sub-Saharan Africa. The T. brucei life cycle is punctuated by numerous developmental stages, each occurring in a specific environmental niche and characterized by a unique morphology, metabolism, ...
journal_title:Molecular microbiology
pub_type: 杂志文章,评审
doi:10.1111/mmi.14682
更新日期:2021-01-12 00:00:00
abstract::A biochemical approach to identify proteins with high affinity for choline-containing pneumococcal cell walls has allowed the localization, cloning and sequencing of a gene (lytC ) coding for a protein that degrades the cell walls of Streptococcus pneumoniae. The lytC gene is 1506 bp long and encodes a protein (LytC) ...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.1999.01455.x
更新日期:1999-07-01 00:00:00
abstract::Although once thought to be unique to bacteria, d-amino acids are also produced by mammals. For example, d-serine is excreted in human urine at concentrations ranging from 3.0 to 40 micro g ml-1. An epidemiological survey demonstrated that urine isolates of E. coli are more likely to catabolise d-serine via expression...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.2003.03543.x
更新日期:2003-07-01 00:00:00
abstract::Transcription of flagellar genes in Caulobacter crecentus is programmed to occur during the predivisional stage of the cell cycle. The mechanism of activation of Class II flagellar genes, the highest identified genes in the Caulobacter flagellar hierarchy, is unknown. As a step toward understanding this process, we ha...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.1993.tb01246.x
更新日期:1993-09-01 00:00:00
abstract::Enhancement of enzyme thermostability by protein engineering gives us information about the thermostabilization mechanism as well as advantages for industrial use of enzymes. In this study, we enhanced the thermostability of endoglucanase EngB, one component of the cellulase complex (cellulosome) from Clostridium cell...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.2002.03049.x
更新日期:2002-08-01 00:00:00
abstract::Mycoplasma hyopneumoniae induces respiratory disease in swine by colonizing cilia causing ciliostasis, cilial loss and epithelial cell death. Heparin binds to M. hyopneumoniae cells in a dose-dependent manner and blocks its ability to adhere to porcine cilia. We show here that Mhp493 (P216), a paralogue of the cilium ...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/j.1365-2958.2008.06546.x
更新日期:2009-02-01 00:00:00
abstract::Bordetella pertussis regulates expression of its virulence factors such as pertussis toxin (Ptx) via the bvg locus, which encodes a two-component system composed of a sensor protein, BvgS, and a transcription activator, BvgA. We used a ptx-lac fusion on the B. pertussis chromosome to analyse promoter activation by alt...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.1997.4371792.x
更新日期:1997-06-01 00:00:00
abstract::Pneumococcus has been shown to bind to epithelial cells of the nasopharynx and lung, and to endothelial cells of the peripheral vasculature. To characterize bacterial elements required for attachment to these cell types, a library of genetically altered pneumococci with defects in exported proteins was screened for th...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.1996.425954.x
更新日期:1996-02-01 00:00:00
abstract::Bacteria tightly regulate intracellular zinc levels to ensure sufficient zinc to support essential functions, while preventing toxicity. The bacterial response to zinc limitation includes the expression of putative zinc metallochaperones belonging to subfamily 1 of the COG0523 family of G3E GTPases. However, the clien...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.14314
更新日期:2019-09-01 00:00:00
abstract::In cell-free Yersinia pseudotuberculosis culture supernatants, we have chemically characterized three N-acyl homoserine lactone (AHL) molecules, N-octanoyl homoserine lactone (C8-HSL), N-(3-oxohexanoyl)homoserine lactone (3-oxo-C6-HSL) and N-hexanoyl homoserine lactone (C6-HSL). We have identified, cloned and sequence...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.1999.01578.x
更新日期:1999-09-01 00:00:00
abstract::Many filamentous cyanobacteria are capable of gliding motility by an undefined mechanism. Within the heterocyst-forming clades, some strains, such as the Nostoc spp. and Fisherella spp., are motile only as specialized filaments termed hormogonia. Here we report on the phenotype of inactivation of a methyl-accepting ch...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.12138
更新日期:2013-02-01 00:00:00
abstract::The replication-initiator protein DnaA is ubiquitous in the eubacterial world. It binds to an asymmetric 9 bp consensus DNA sequence, the DnaA box. Besides its primary function as an initiator, it acts as a transcription factor that represses or activates several genes, or terminates transcription, depending on the lo...
journal_title:Molecular microbiology
pub_type: 杂志文章,评审
doi:10.1046/j.1365-2958.1997.3171678.x
更新日期:1997-04-01 00:00:00
abstract::Helicobacter pylori is anomalous among non nitrogen-fixing bacteria in containing an incomplete NIF system for Fe-S cluster assembly comprising two essential proteins, NifS (cysteine desulfurase) and NifU (scaffold protein). Although nifU deletion strains cannot be obtained via the conventional gene replacement, a Nif...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1111/mmi.13942
更新日期:2018-05-01 00:00:00
abstract::Tuberculosis remains the greatest cause of death worldwide due to a single pathogen. In order to identify the genes required for the pathogenicity of Mycobacterium tuberculosis, a functional genomic approach was developed. A library of signature-tagged transposon mutants of this bacterium was constructed and screened ...
journal_title:Molecular microbiology
pub_type: 杂志文章
doi:10.1046/j.1365-2958.1999.01593.x
更新日期:1999-10-01 00:00:00