Abstract:
:A nicotinamide adenine dinucleotide-specific L-(+)-lactate dehydrogenase (LDH) (EC 1.11.27) from Actinomyces viscosus T-6-1600 was purified approximately 110-fold by a combination of diethylaminoethyl-cellulose and 0.5 M Agarose A column chromatography. The ldh was stable at 26 C, but was quite labile at temperatures below 5 C. The enzyme had a molecular weight of 100,000 +/- 10,000 as determined by 0.5 M Agarose molecular exclusion chromatography and showed optimum activity between pH 5.5 and 6.2. The A. viscosus LDH exhibited homotropic interactions with its substrate, pyruvate, and its coenzyme, reduced nicotinamide adenine dinucleotide, indicating multiple binding sites on the enzyme for these ligands with some degree of cooperative interaction between them. The enzyme was under negative control by adenosine 5'-triphosphate, and its kinetic response to the negative effector was sigmoidal in nature. Inorganic phosphate reversed the inhibition exerted on the A. viscosus LDH by adenosine. The 5'-triphosphate thermal stability at 65 C of the LDH from A. viscosus was increased in the presence of its negative effector, adenosine 5'-triphosphate, but was markedly decreased in the presence of its coenzyme, reduced nicotinamide adenine dinucleotide. The glycolytic intermediate, fructose-1,6-diphosphate, had no effect on the catalytic activity of the A. viscosus LDH at saturating pyruvate concentrations. However, fructose-1,6-diphosphate was a potent positive effector at low substrate concentrations. Thus the A. viscosus LDH is under positive control by fructose-1,6-diphosphate and inorganic phosphate, but under negative control by adenosine 5'-triphosphate.
journal_name
J Bacterioljournal_title
Journal of bacteriologyauthors
Brown AT,Christian CP,Eifert RLdoi
10.1128/JB.122.3.1126-1135.1975subject
Has Abstractpub_date
1975-06-01 00:00:00pages
1126-35issue
3eissn
0021-9193issn
1098-5530journal_volume
122pub_type
杂志文章abstract::Salmonella virulence requires the initial invasion of host cells, followed by modulation of the intracellular environment for survival and replication. In an effort to characterize the role of small RNAs in Salmonella pathogenesis, we inadvertently identified a 5-kDa protein named YshB that is involved in the intracel...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.00314-19
更新日期:2019-08-08 00:00:00
abstract::Flagellum formation by ubiquinone- and menaquinone-deficient mutant strains of Escherichia coli K-12 was studied under both aerobic and anaerobic growth conditions. Ubiquinone was found to be obligatory for aerobic flagellum formation but could be replaced by menaquinone for anaerobic flagellum formation. A mutant dev...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.132.3.1034-1035.1977
更新日期:1977-12-01 00:00:00
abstract::Growth of Salmonella typhimurium on acetate as a sole carbon source requires expression of the glyoxylate shunt; however, the genes for the glyoxylate shunt enzymes have not been previously identified in S. typhimurium. In this study, we isolated transposon insertions in the genes for the two unique enzymes of this pa...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.169.7.3029-3034.1987
更新日期:1987-07-01 00:00:00
abstract::ULTRACENTRIFUGATION IN SUCROSE DENSITY GRADIENTS WAS EMPLOYED TO ESTIMATE THE MOLECULAR WEIGHTS AND TO DETERMINE POSSIBLE PHYSICAL AGGREGATION OF THE FIVE ENZYMES CATALYZING STEPS TWO TO SIX IN THE PRECHORISMIC ACID PORTION OF THE POLYAROMATIC SYNTHETIC PATHWAY IN SIX SPECIES OF BACTERIA: Escherichia coli, Salmonella ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.99.1.222-230.1969
更新日期:1969-07-01 00:00:00
abstract::The F-plasmid-encoded TraI protein, also known as DNA helicase I, is a bifunctional protein required for conjugative DNA transfer. The enzyme catalyzes two distinct but functionally related reactions required for the DNA processing events associated with conjugation: the site- and strand-specific transesterification (...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.187.2.697-706.2005
更新日期:2005-01-01 00:00:00
abstract::The D1:1 protein and its potentially occurring degradation products were overexpressed in Escherichia coli. Protein-DNA interaction is shown for the promoter region of psbAI. The D1:1 degradation products may be involved in transcription regulation of psbAI by binding in the promoter region. Additionally, C-terminal f...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.01428-06
更新日期:2007-03-01 00:00:00
abstract::Cells of the cyanobacterium Anabaena variabilis starved for phosphate for 3 days took up phosphate at about 100 times the rate of unstarved cells. Kinetic data suggested that a new transport system had been induced by starvation for phosphate. The inducible phosphate transport system was quickly repressed by addition ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.170.3.1143-1147.1988
更新日期:1988-03-01 00:00:00
abstract::In Staphylococcus aureus, the transport of dicarboxylates is mediated in part by the Na+-linked carrier protein SdcS. This transporter is a member of the divalent-anion/Na+ symporter (DASS) family, a group that includes the mammalian Na+/dicarboxylate cotransporters NaDC1 and NaDC3. In earlier work, we cloned and expr...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.01452-06
更新日期:2007-02-01 00:00:00
abstract::Single spores of Saccharomyces cerevisiae were examined during germination and outgrowth by scanning electron and phase-contrast microscopy. Also determined were changes in cell weight and light absorbance, trehalose utilization, and synthesis of protein and KOH-soluble carbohydrates. These studies reveal that develop...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.109.3.1232-1238.1972
更新日期:1972-03-01 00:00:00
abstract::The methylenetetrahydrofolate dehydrogenase of the amethopterin-resistant strain Streptococcus faecium var. durans A(k) was purified 100-fold. Because it is extremely labile, this enzyme required protection by 1 mm nicotinamide adenine dinucleotide phosphate (NADP(+)) during purification; 0.01 mm EADP(+) with 0.1% bov...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.95.5.1779-1789.1968
更新日期:1968-05-01 00:00:00
abstract::Staphylococcus lugdunensis is the only coagulase-negative Staphylococcus species with a locus encoding iron-regulated surface determinant (Isd) proteins. In Staphylococcus aureus, the Isd proteins capture heme from hemoglobin and transfer it across the wall to a membrane-bound transporter, which delivers it into the c...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.01195-12
更新日期:2012-12-01 00:00:00
abstract::The major cold shock protein of Escherichia coli, CS7.4, is produced at a level of 13% of total protein synthesis upon a temperature shift from 37 to 10 degrees C. The transcription of its gene (cspA) was found to be tightly regulated and induced only at low temperature. In addition, the cspA mRNA was extremely unstab...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.174.12.3867-3873.1992
更新日期:1992-06-01 00:00:00
abstract::A Mycoplasma gallisepticum subcellular fraction (P2), which contains the deoxyribonucleic acid replication complex, can be isolated by differential centrifugation of freeze-thaw-lysed cells. The nascent deoxyribonucleic acid is released from P2 by Lubrol-WX, sodium dodecyl sulfate, Pronase, and deoxyribonuclease, but ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.120.1.495-501.1974
更新日期:1974-10-01 00:00:00
abstract::Mycoplasma laidlawii was recovered from burns from 13 of 52 patients. In most cases, cocci or bacilli were isolated simultaneously. ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.98.2.827-828.1969
更新日期:1969-05-01 00:00:00
abstract::Purine nucleoside phosphorylase (EC 2.4.2.1) from Bacillus cereus T was examined at hourly intervals during growth and sporulation. The enzyme has maximal activity in extracts prepared from cells during stages I and II. The activity during exponential growth is only 6.6% of the maximum and that in free spores is only ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.111.1.33-36.1972
更新日期:1972-07-01 00:00:00
abstract::Rhythmically advancing waves of cells, called ripples, arise spontaneously during the aggregation of Myxococcus xanthus into fruiting bodies. Extracts prepared by washing rippling cells contain a substance that will induce quiescent cells to ripple. Three lines of evidence indicate that murein (peptidoglycan) is the r...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:
更新日期:1982-10-01 00:00:00
abstract::Sato, Ichiei (School of Medicine, Gunma University, Maebashi, Japan), Tokumitsu Tanaka, Kazuko Saito, and Susumu Mitsuhashi. Inhibition of Salmonella enteritidis ingested in mononuclear phagocytes from liver and subcutaneous tissue of mice immunized with live vaccine. J. Bacteriol. 83:1306-1312. 1962.-In our earlier s...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.83.6.1306-1312.1962
更新日期:1962-06-01 00:00:00
abstract::In response to molecular oxygen and/or fixed nitrogen, the product of the Klebsiella pneumoniae nitrogen fixation L (nifL) gene inhibits NifA-mediated transcriptional activation. Nitrogen regulation of NifL function occurs at two levels: transcription of the nifLA operon is regulated by the general Ntr system, and the...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.179.23.7446-7455.1997
更新日期:1997-12-01 00:00:00
abstract::Addition of purines to the growth medium of Escherichia coli represses synthesis of cytosine deaminase (codA) and enzymes of purine de novo synthesis. After Tn10 mutagenesis, mutants displaying derepressed levels of cytosine deaminase in the presence of hypoxanthine were isolated. One of these had simultaneously acqui...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.171.4.2124-2127.1989
更新日期:1989-04-01 00:00:00
abstract::The murG gene of Escherichia coli encodes the N-acetylglucosaminyltransferase responsible for the final step in the formation of the lipid-linked disaccharide-pentapeptide subunit of peptidoglycan. Using trypsin to probe maxicell spheroplasts, we show that this enzyme is peripherally associated with the inner face of ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.175.6.1841-1843.1993
更新日期:1993-03-01 00:00:00
abstract::Transcriptomic, metabolomic, physiological, and computational modeling approaches were integrated to gain insight into the mechanisms of antibiotic tolerance in an in vitro biofilm system. Pseudomonas aeruginosa biofilms were grown in drip flow reactors on a medium composed to mimic the exudate from a chronic wound. A...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.00307-19
更新日期:2019-10-21 00:00:00
abstract::The degradation of synthetic compounds requires bacteria to recruit and adapt enzymes from pathways for naturally occurring compounds. Previous work defined the steps in 2,4-dinitrotoluene (2,4-DNT) metabolism through the ring fission reaction. The results presented here characterize subsequent steps in the pathway th...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.184.15.4219-4232.2002
更新日期:2002-08-01 00:00:00
abstract::In this study, we cloned the Pseudomonas aeruginosa zwf gene, encoding glucose-6-phosphate dehydrogenase (G6PDH), an enzyme that catalyzes the NAD+- or NADP+-dependent conversion of glucose-6-phosphate to 6-phosphogluconate. The predicted zwf gene product is 490 residues, which could form a tetramer with a molecular m...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.180.7.1741-1749.1998
更新日期:1998-04-01 00:00:00
abstract::The virulence factors of the cariogenic bacterium Streptococcus sobrinus have been difficult to assess because of a lack of tools for the genetic manipulation of this organism. The construction of an Escherichia coli-Streptococcus shuttle vector, pDL289, that can be mobilized into S. sobrinus by the conjugative plasmi...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.177.17.5028-5034.1995
更新日期:1995-09-01 00:00:00
abstract::Level of competence reached by Bacillus subtilis 168 lysogenic for temperate phage phi 105 was reduced compared to that reached by nonlysogenic cells. This effect was probably related to an alteration of the bacterial surface. Deoxyribonucleic acid extracted from phi 105 lysogenic bacteria was used to transform other ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.98.3.874-877.1969
更新日期:1969-06-01 00:00:00
abstract::Isolated cell walls of Staphylococcus aureus and Micrococcus lysodeikticus were found to expand and contract in response to changes in environmental pH and ionic strength. These volume changes, which could amount to as much as a doubling of wall dextran-impermeable volume, were related to changes in electrostatic inte...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.101.1.92-101.1970
更新日期:1970-01-01 00:00:00
abstract::Two-dimensional gel analyses were made of proteins synthesized in Escherichia coli during various O2- -generating conditions. Nine proteins were constitutively synthesized over wild-type levels in superoxide dismutase (sodA sodB) double mutants. Addition of redox cycling agents such as paraquat and plumbagin at variou...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.171.3.1476-1484.1989
更新日期:1989-03-01 00:00:00
abstract::Thin pili of the closely related IncI1 plasmids ColIb-P9 and R64 are required only for liquid mating and belong to the type IV family of pili. They were sedimented by ultracentrifugation from culture medium in which Escherichia coli cells harboring ColIb-P9- or R64-derived plasmids had been grown, and then the pili we...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.180.11.2842-2848.1998
更新日期:1998-06-01 00:00:00
abstract::Here we have characterized the Rickettsia prowazekii RP534 protein, a homologue of the Pseudomonas aeruginosa ExoU phospholipase A (PLA) secreted cytotoxin. Our studies showed that purified recombinant RP534 PLA possessed the predicted PLA(2) and lyso-PLA(2) activities based on what has been published for P. aeruginos...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.00141-11
更新日期:2011-09-01 00:00:00
abstract::In Escherichia coli K-12, two enzymes, encoded by ilvE and tyrB, catalyze the amination of 2-ketoisocaproate (2-KIC) to form leucine. Although leucine-requiring derivatives of an ilvE strain that are unable to grow on 2-KIC were expected to have mutations only in tyrB, mapping studies showed that one such mutation was...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.173.12.3864-3871.1991
更新日期:1991-06-01 00:00:00