Abstract:
:DNA uptake in competent Streptococcus pneumoniae was strongly dependent on intracellular pH. Ionophore treatments that either acidified or alkalinized the cytoplasm reduced DNA transport. This indicates that the optimum pH for DNA uptake corresponds to the intracellular pH of competent bacteria which is 8.3 +/- 0.2. In addition, the ATP pool of the bacteria appeared to be a critical parameter in the process. The pattern of inhibition by arsenate, when the culture was treated at different steps of the competence cycle, suggested firstly, that a threshold ATP level was required to trigger transport and secondly, an ATP requirement for the process itself. This may indicate an ATP involvement in the activation of an uptake machinery functioning at the expense of ATP.
journal_name
FEMS Microbiol Lettjournal_title
FEMS microbiology lettersauthors
Clavé C,Trombe MCdoi
10.1016/0378-1097(89)90376-5subject
Has Abstractpub_date
1989-11-01 00:00:00pages
113-8issue
1-2eissn
0378-1097issn
1574-6968journal_volume
53pub_type
杂志文章abstract::Two Pseudomonas aeruginosa genes, termed phaJ1(Pa) and phaJ2(Pa), homologous to the Aeromonas caviae (R)-specific enoyl-CoA hydratase gene (phaJ(Ac)) were cloned using a PCR technique to investigate the monomer-supplying ability for polyhydroxyalkanoate (PHA) synthesis from beta-oxidation cycle. Two expression plasmid...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.2000.tb09013.x
更新日期:2000-03-15 00:00:00
abstract::In order to investigate whether the iron acquisition mechanisms of Staphylococcus aureus are induced by iron restriction in vitro, we examined S. aureus ATCC 6538 for production of siderophore and expression of transferrin-binding protein (SA-tbp) in normal or deferrated brain heart infusion broth (BHI). Siderophore p...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.1998.tb13020.x
更新日期:1998-06-01 00:00:00
abstract::Methanogenic archaea conserve energy for growth by reducing some one- and two-carbon compounds to methane and concomitantly generating an ion motive force. Growth of Methanosarcina acetivorans on carbon monoxide (CO) is peculiar as it involves formation of, besides methane, formate, acetate and methylated thiols. It h...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.2009.01492.x
更新日期:2009-03-01 00:00:00
abstract::As part of the ongoing sequencing of the complete Salmonella typhimurium LT2 genome, a partly ordered set of 416 lambda clones has been developed, representing over 90% of the genome. The average insert size is 17 kb. Sequences were obtained from both ends of each clone in this set. A total of over 600 kb of sequence ...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.1999.tb13533.x
更新日期:1999-04-15 00:00:00
abstract::Synthesis of nitrate reductase in the unicellular cyanobacterium Synechococcus sp. strain PCC 7942 took place at a slow rate when the cells were incubated without a supply of inorganic carbon, but addition to these cells of CO(2)/bicarbonate or, in a Synechococcus strain transformed with a gene encoding a 2-oxoglutara...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1016/S0378-1097(03)00208-8
更新日期:2003-04-25 00:00:00
abstract::Mycobacterium avium ssp. paratuberculosis (M. paratuberculosis), the causative agent of Johne's disease, is an important animal pathogen that has also been implicated in human disease. The major proteins expressed by M. paratuberculosis were analyzed by two-dimensional gel electrophoresis, and a superoxide dismutase (...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.2001.tb10809.x
更新日期:2001-08-21 00:00:00
abstract::The ADAMs are a family of integral membrane proteases involved in shedding and fusion events in animal tissues. Here, we report the identification of two ADAMs, ADM-A and ADM-B, in the pathogenic fungus Aspergillus fumigatus. The domain structure of metazoan ADAMs was seen in ADM-A and -B, although with some differenc...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1016/j.femsle.2005.05.017
更新日期:2005-07-01 00:00:00
abstract::DNA polymerase from the archaeon Pyrococcus abyssi strain Orsay was expressed in Escherichia coli. The recombinant DNA polymerase (Pab) was purified to homogeneity by heat treatment followed by 5 steps of chromatography and characterized for PCR applications. Buffer optimization experiments indicated that Pab PCR perf...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.2002.tb11460.x
更新日期:2002-11-19 00:00:00
abstract::Two monoclonal antibodies (G6 and 7B), generated against a 63-kDa stress protein (GSP63) from Neisseria gonorrhoeae strain VP1, were used to investigate the antigenic heterogeneity of GSP63 among the Neisseriaceae and its antigenic relationship with the Hsp60 heat-shock protein family. Immunoblotting experiments demon...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1016/0378-1097(92)90282-s
更新日期:1992-11-15 00:00:00
abstract::Intraterrestrial life has been found at depths of several thousand metres in deep sub-sea floor sediments and in the basement crust beneath the sediments. It has also been found at up to 2800-m depth in continental sedimentary rocks, 5300-m depth in igneous rock aquifers and in fluid inclusions in ancient salt deposit...
journal_title:FEMS microbiology letters
pub_type: 杂志文章,评审
doi:10.1111/j.1574-6968.2000.tb09033.x
更新日期:2000-04-01 00:00:00
abstract::A complementary DNA of the Aspergillus nidulans chsB gene encoding chitin synthase, an essential gene for hyphal growth, was obtained by RT-PCR and expressed in Saccharomyces cerevisiae by using the GAL1 promoter in a multicopy plasmid. The biochemical characteristics of chitin synthase B (ChsB) expressed in S. cerevi...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.1997.tb10341.x
更新日期:1997-04-15 00:00:00
abstract::A family of stable lactococcal vectors have been constructed based on the pFX1 replicon using either the alpha fragment or the complete Escherichia coli lacZ gene as a selective marker. These vectors also incorporate multiple cloning sites and examples are given of their use for gene cloning and translational fusion s...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.1991.tb04321.x
更新日期:1991-01-01 00:00:00
abstract::Phlebia tremellosa decolourised eight synthetic textile dyes (200 mg l(-1)) by greater than 96% within 14 days under stationary incubation conditions. High performance liquid chromatography analysis of culture supernatants indicated that Remazol Black B was degraded by the fungus, however, complete mineralisation did ...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.2000.tb09174.x
更新日期:2000-07-01 00:00:00
abstract::Tagging of two cell wall mannoproteins, Cwp1p and Cwp2p, in Saccharomyces cerevisiae with the green fluorescent protein from Aequorea victoria resulted in incorporation of fluorescent fusion proteins into the cell wall. Both living cells and isolated cell walls became brightly labeled. Intriguingly, the incorporation ...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.1998.tb13006.x
更新日期:1998-05-15 00:00:00
abstract::A gene responsible for increased synthesis of hexaheme nitrite reductase (cytochrome c552) of Escherichia coli K-12 was cloned into pBR322 by the direct immunological screening method using antiserum against the purified enzyme. The cloned gene was mapped at 5 min on the chromosomal linkage map as the dni gene (relate...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1016/0378-1097(91)90355-e
更新日期:1991-10-01 00:00:00
abstract::Enteroaggregative Escherichia coli (EAEC) is an important diarrhoeal pathogen causing diseases in multiple epidemiological and clinical settings. In developing countries like India, diarrhoeal diseases are one of the major killers among paediatric population and oddly, few studies are available from Indian paediatric ...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1093/femsle/fnw189
更新日期:2016-09-01 00:00:00
abstract::An obligately anaerobic spirochete designated strain SEBR 4228T (T = type strain) was isolated from an oil field of Congo, Central Africa. The strain grew optimally with a sodium chloride concentration of 5% (sodium chloride concentration) growth range 1.0-10%) at 37 degrees C (growth temperature range 20-40 degrees C...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.1997.tb13876.x
更新日期:1997-10-15 00:00:00
abstract::The main hypothesis of this work was to evaluate the presence of lactic acid bacteria (LAB) intrinsically resistant to plant essential oils in sage (Salvia officinalis L.) and laurel (Laurus nobilis), for future applications in functional cheese production by addition of aromatic herbs. The effect of the drying proces...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1093/femsle/fnaa071
更新日期:2020-05-01 00:00:00
abstract::Serine hydroxymethyltransferase (SHMT) is a key enzyme in cellular one-carbon pathway and has been studied in many living organisms from bacteria to higher plants and mammals. However, biochemical and molecular characterization of SHMT from photoautotrophic microorganisms remains a challenge. Here, we isolated the SHM...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.2012.02597.x
更新日期:2012-08-01 00:00:00
abstract::Two actinomycete strains, CHR3 and CHR28, were isolated from metal-contaminated sediments from Baltimore Inner Harbor. The isolates were classified as Streptomyces spp. Agar diffusion assays showed both isolates to be resistant to mercuric chloride and phenylmercuric acetate. Hybridization experiments indicated that g...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.1998.tb12996.x
更新日期:1998-05-01 00:00:00
abstract::To clarify the cause of the supersusceptibility of Branhamella catarrhalis to macrolide antibiotics, which are well-known to be inactive to most Gram-negative bacteria, we determined its cell surface hydrophobicity by the partition experiment between water and hydrocarbons. Its cell surface was found to be markedly mo...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1016/0378-1097(89)90488-6
更新日期:1989-05-01 00:00:00
abstract::The replication region of plasmid pRA2 from Pseudomonas alcaligenes NCIB 9867 (strain P25X) was localized within a 5.9-kbp DNA fragment and its sequence was determined. An interesting feature of the sequence is the presence of a 1.3-kbp region containing seven, highly conserved, direct repeats of 72 bp in length. The ...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.1998.tb12815.x
更新日期:1998-01-15 00:00:00
abstract::A novel bacterial strain, PM2, capable of growing on methanol, was isolated in alkaline conditions from a soil inoculum. This bacterium was characterized at the physiological, biochemical and molecular level. Based on biochemical and molecular data strain PM2 was classified as a novel member of the group of fluorescen...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1016/S0378-1097(03)00692-X
更新日期:2003-10-24 00:00:00
abstract::Organic acids such as monocarboxylic acids, dicarboxylic acids or even more complex molecules such as sugar acids, have displayed great applicability in the industry as these compounds are used as platform chemicals for polymer, food, agricultural and pharmaceutical sectors. Chemical synthesis of these compounds from ...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1093/femsle/fnaa118
更新日期:2020-08-01 00:00:00
abstract::Outer membrane-associated proteins of 18 kDa were expressed by enteroaggregative Escherichia coli (EAggEC) belonging to serotypes O126:H27 and O44:H18, which hybridized with a probe derived from a plasmid necessary for enteroaggregative adhesion. The 18 kDa proteins expressed by strains of E. coli, belonging to these ...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.1995.tb07804.x
更新日期:1995-10-01 00:00:00
abstract::Plasmodium falciparum sirtuin, PfSir2, contains histone deacetylase (HDAC) activity that may be central to the regulation of virulence gene expression in the parasites. Although a few reports have been published recently regarding in vitro and in vivo function of PfSir2, expression of the endogenous protein (c. 30 kDa...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.2008.01135.x
更新日期:2008-05-01 00:00:00
abstract::Clostridium difficile and Clostridium perfringens type A are infectious agents of enteric diseases. The main virulence factors of these microorganisms include toxins A and B of C. difficile (ToxA and ToxB) and enterotoxin of C. perfringens (Cpe). In this study genetic constructions have been created for the expression...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1016/S0378-1097(03)00560-3
更新日期:2003-08-29 00:00:00
abstract::An expressed sequence tag database of the freshwater fish parasite, Ichthyophthirius multifiliis (Ciliophora) was analyzed to seek for proteases potentially involved in the invasion and degradation of host tissues during infection. The translation of the database revealed two cathepsin L cysteine proteases (Icp1 and I...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.2006.00611.x
更新日期:2007-04-01 00:00:00
abstract::A novel 36-kDa endochitinase named chit36 has been isolated and characterized from Trichoderma harzianum Rifai TM. Partial amino acid sequences from the purified protein were used to clone the fungal cDNA, based on polymerase chain reaction with degenerate primers. The complete open reading frame encodes a 344-amino a...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.2001.tb10710.x
更新日期:2001-06-25 00:00:00
abstract::We present evidence that the anthrax toxin lethal factor binds multiple zinc atoms. Results from atomic adsorption spectroscopy indicate that lethal factor contains approximately three zinc atoms per toxin molecule. Lethal factor treated with EDTA and o-phenanthroline contained a similar number of zinc atoms, indicati...
journal_title:FEMS microbiology letters
pub_type: 杂志文章
doi:10.1111/j.1574-6968.1994.tb07306.x
更新日期:1994-12-15 00:00:00