Abstract:
:Scanning electron microscopy has been employed to examine events in the release and development of mitospores of the aquatic fungus, Allomyces arbuscula. Among the salient features of spore release from the mitosporangium is the digestion of the inner matrix of the exit papillum. Hydrolysis appears to begin at the outer layer of the papillum plug matrix and probably results from activation of localized hydrolytic enzymes. The plug clearly consists of at least two different component layers. Elaboration of mitospores from the mitosporangium is depicted in several micrographs. Motile spores were induced to begin development, and the sequence of surface changes associated with the encystment process was studied. Time course studies show the retraction of the flagellum, the change from elipsoidal to spherical shape, and the deposition of the cell wall. Early in encystment, small vesicles accumulate on the surface of the plasma membrane. These enlarge and fuse to form the mature cyst wall. This surface view of cell wall deposition appears to support the possible role of gamma particles in cell wall synthesis during encystment.
journal_name
J Bacterioljournal_title
Journal of bacteriologyauthors
Seale TW,Delehanty J,Runyan RBdoi
10.1128/JB.120.3.1417-1426.1974subject
Has Abstractpub_date
1974-12-01 00:00:00pages
1417-26issue
3eissn
0021-9193issn
1098-5530journal_volume
120pub_type
杂志文章abstract::A 5.4-kilobase DNA fragment carrying Pseudomonas denitrificans cob genes has been sequenced. The nucleotide sequence and genetic analysis revealed that this fragment carries five different cob genes (cobA to cobE). Four of these genes present the characteristics of translationally coupled genes. cobA has been identifi...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.172.10.5968-5979.1990
更新日期:1990-10-01 00:00:00
abstract::The mechanisms by which bacteria uptake solutes across the cell membrane broadly impact their cellular energetics. Here, we use functional genomic, genetic, and biophysical approaches to reveal how Clostridium (Lachnoclostridium) phytofermentans, a model bacterium that ferments lignocellulosic biomass, uptakes plant h...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.00241-19
更新日期:2019-07-10 00:00:00
abstract::The conversion of Pseudomonas aeruginosa PAO to the mucoid phenotype has been reported for a chronic pulmonary infection model in rats (D. E. Woods, P. A. Sokol, L. E. Bryan, D. G. Storey, S. J. Mattingly, H. J. Vogel, and H. Ceri, J. Infect. Dis. 163:143-149, 1991). This conversion was associated with a genetic rearr...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.176.3.553-562.1994
更新日期:1994-02-01 00:00:00
abstract::A spontaneous lac+ revertant of an adenylate cyclase deletion strain of Escherichia coli K-12 was isolated and characterized. This revertant, designated strain KC20, exhibited a pleiotropic suppression of the adenylate cyclase defect, with the crp locus being the site of the suppressor mutation. Cyclic adenosine 3',5'...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.147.2.500-508.1981
更新日期:1981-08-01 00:00:00
abstract::The antibiotic cerulenin causes the immediate cessation of phospholipid biosynthesis in both chemoheterotrophic and photoheterotrophic cultures of Rhodopseudomonas sphaeroides. Macromolecule biosynthesis in photoheterotrophic cells was unaffected by cerulenin for the first 2 h after antibiotic addition and then contin...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.156.3.1322-1331.1983
更新日期:1983-12-01 00:00:00
abstract::Isoaspartyl sites, in which an aspartic acid residue is linked to its C-flanking neighbor via its beta-carboxyl side chain, are generally assumed to be an abnormal modification arising as proteins age. The enzyme protein L-isoaspartate methyltransferase (PIMT), present in many bacteria, plants, and animals, catalyzes ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.181.9.2872-2877.1999
更新日期:1999-05-01 00:00:00
abstract::Sequencing the insertion sites of 8,865 Tn917 insertions in Enterococcus faecalis strain OG1RF identified a hot spot in the replication terminus region corresponding to 6% of the genome where 65% of the transposons had inserted. In E. faecalis, Tn917 preferentially inserted at a 29-bp consensus sequence centered on TA...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.186.21.7280-7289.2004
更新日期:2004-11-01 00:00:00
abstract::In gram-negative bacteria, numerous cell functions, including respiration-linked electron transport, have been ascribed to the cytoplasmic membrane. Gram-negative bacteria which use solid substrates (e.g., oxidized manganese or iron) as terminal electron acceptors for anaerobic respiration are presented with a unique ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.174.11.3429-3438.1992
更新日期:1992-06-01 00:00:00
abstract::The E. coli RelA protein is a ribosome-dependent (p)ppGpp synthetase that is activated in response to amino acid starvation. RelA can be dissected both functionally and physically into two domains: The N-terminal domain (NTD) (amino acids [aa] 1 to 455) contains the catalytic domain of RelA, and the C-terminal domain ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.183.2.570-579.2001
更新日期:2001-01-01 00:00:00
abstract::The halophilic bacterium Halomonas elongata synthesizes as its main compatible solute the aspartate derivative ectoine. We constructed a deletion mutant of H. elongata, KB1, defective in ectoine synthesis and tolerating elevated salt concentrations only in the presence of external compatible solutes. The dependency of...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.184.11.3078-3085.2002
更新日期:2002-06-01 00:00:00
abstract::The gene for an extremely thermostable oligo-1,6-glucosidase (dextrin-6-alpha-D-glucanohydrolase; EC 3.2.1.10) of obligately thermophilic Bacillus thermoglucosidasius KP1006 was cloned within a 4.2-kilobase HindIII-PvuII fragment of DNA by using the plasmid pUC19 as a vector and Escherichia coli C600 as a host. The ge...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.171.2.1219-1222.1989
更新日期:1989-02-01 00:00:00
abstract::After inoculation of a stationary-phase culture of Nitrosomonas europaea into fresh growth solution, the cell-associated orthophosphate increased rapidly to 800 mumoles/g (wet weight), whereas the acid-insoluble long-chain polyphosphate content decreased rapidly to 22 mumoles/g. As growth proceeded, the orthophosphate...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.103.1.199-206.1970
更新日期:1970-07-01 00:00:00
abstract::The marine bacterium and human pathogen Vibrio parahaemolyticus rapidly colonizes surfaces by using swarming motility and forming robust biofilms. Entering one of the two colonization programs, swarming motility or sessility, involves differential regulation of many genes, resulting in a dramatic shift in physiology a...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.00723-19
更新日期:2020-02-25 00:00:00
abstract::A positive selection method for isolation of nitrogenase-derepressed mutant strains of a filamentous cyanobacterium, Anabaena variabilis, is described. Mutant strains that are resistant to a glutamate analog, L-methionine-D,L-sulfoximine, were screened for their ability to produce and excrete NH4+ into medium. Mutant ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.165.2.412-419.1986
更新日期:1986-02-01 00:00:00
abstract::Flavin-based electron bifurcation has recently been characterized as an essential energy conservation mechanism that is utilized by hydrogenotrophic methanogenic Archaea to generate low-potential electrons in an ATP-independent manner. Electron bifurcation likely takes place at the flavin associated with the α subunit...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.00895-13
更新日期:2013-11-01 00:00:00
abstract::gldA, the structural gene for the NAD(+)-dependent glycerol dehydrogenase, was mapped at 89.2 min on the Escherichia coli linkage map, cotransducible with, but not adjacent to, the glpFKX operon encoding the proteins for the uptake and phosphorylation of glycerol. gldA was cloned, and its position on the physical map ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.176.6.1796-1800.1994
更新日期:1994-03-01 00:00:00
abstract::The P fimbrial gene clusters encoding the serologically different F7(1), F7(2), F9, and F11 fimbriae were compared functionally. The results show that these gene clusters are closely related. ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.167.1.407-410.1986
更新日期:1986-07-01 00:00:00
abstract::In Pseudomonas aeruginosa, the CbrA/CbrB two-component system is instrumental in the maintenance of the carbon-nitrogen balance and for growth on carbon sources that are energetically less favorable than the preferred dicarboxylate substrates. The CbrA/CbrB system drives the expression of the small RNA CrcZ, which ant...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.00164-11
更新日期:2011-06-01 00:00:00
abstract::Reference strains from 48 selected serovars representing eight species of Leptospira were examined by two polymerase chain reaction (PCR)-based strategies. First, mapped restriction site polymorphisms (MRSP) were examined in PCR products from portions of rrs (16S rRNA gene) and rrl (23S rRNA gene). Twenty MRSP and 2 l...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.175.4.973-981.1993
更新日期:1993-02-01 00:00:00
abstract::Division site placement in Escherichia coli involves interactions of the MinD protein with MinC and MinE and with other MinD molecules to form membrane-associated polymeric structures. In this work, as part of a study of these interactions, we established that heterologous membrane-associated proteins such as MinD can...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.188.8.2993-3001.2006
更新日期:2006-04-01 00:00:00
abstract::Thiocyanate hydrolase is a newly found enzyme from Thiobacillus thioparus THI 115 that converts thiocyanate to carbonyl sulfide and ammonia (Y. Katayama, Y. Narahara, Y. Inoue, F. Amano, T. Kanagawa, and H. Kuraishi, J. Biol. Chem. 267:9170-9175, 1992). We have cloned and sequenced the scn genes that encode the three ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.180.10.2583-2589.1998
更新日期:1998-05-01 00:00:00
abstract:UNLABELLED:To stabilize cellular integrity in the face of environmental perturbations, most bacteria, including cyanobacteria, synthesize and maintain a strong, flexible, three-dimensional peptidoglycan lattice. Anabaena sp. strain PCC 7120 is a filamentous cyanobacterium capable of differentiating morphologically dist...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.01027-15
更新日期:2016-03-31 00:00:00
abstract::A reversal in the relative amounts of the two major species of tyrosine transfer ribonucleic acid (tRNATyr) (I and II) has been previously observed by others during the development of Bacillus subtilis. These species have been purified by benzoylated diethylaminoethyl-cellulose chromatography and were shown to differ ...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.127.1.268-280.1976
更新日期:1976-07-01 00:00:00
abstract::OxyR is a DNA binding protein that differentially regulates a cell's response to hydrogen peroxide-mediated oxidative stress. We previously reported that the reduced form of OxyR is sufficient for repression of transcription of agn43 from unmethylated template DNA, which is essential for deoxyadenosine methylase (Dam)...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.185.7.2203-2209.2003
更新日期:2003-04-01 00:00:00
abstract::Bacteroides fragilis synthesizes eight distinct capsular polysaccharides, more than any described bacterium outside the order Bacteroidales. Here, we show that this organism also produces a high-molecular-weight extracellular polysaccharide (EPS). Expression of the EPS results in the formation of a large polysaccharid...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.01519-07
更新日期:2008-02-01 00:00:00
abstract::The genome of Halobacterium sp. strain NRC-1 contains a large gene cluster, gvpMLKJIHGFEDACNO, that is both necessary and sufficient for the production of buoyant gas-filled vesicles. Due to the resistance of gas vesicles to solubilization, only the major gas vesicle protein GvpA and a single minor protein, GvpC, were...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.186.10.3182-3186.2004
更新日期:2004-05-01 00:00:00
abstract::"Roseburia inulinivorans" is an anaerobic polysaccharide-utilizing firmicute bacterium from the human colon that was identified as a producer of butyric acid during growth on glucose, starch, or inulin. R. inulinivorans A2-194 is also able to grow on the host-derived sugar fucose, following a lag period, producing pro...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.00137-06
更新日期:2006-06-01 00:00:00
abstract::The rates of thermal denaturation and the molecular weights of the two isofunctional enol-lactone hydrolases (ELH I and ELH II) of Acinetobacter calcoaceticus were determined. The molecular weights of ELH I and ELH II were found by gel filtration to be approximately 24,000 and 21,000, respectively. In crude extract at...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.106.2.369-374.1971
更新日期:1971-05-01 00:00:00
abstract::The alpha-aminoadipate pathway for lysine biosynthesis is present only in fungi. The alpha-aminoadipate reductase (AAR) of this pathway catalyzes the conversion of alpha-aminoadipic acid to alpha-aminoadipic-delta-semialdehyde by a complex mechanism involving two gene products, Lys2p and Lys5p. The LYS2 and LYS5 genes...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.183.24.7120-7125.2001
更新日期:2001-12-01 00:00:00
abstract::The origin of replication of the plasmid R1162 contains an initiation site for the synthesis of each DNA strand. When one of these sites (oriL) is deleted, synthesis on the corresponding strand is no longer initiated efficiently in vitro by the R1162-encoded replication proteins, and the plasmid is no longer stably ma...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.178.16.4870-4876.1996
更新日期:1996-08-01 00:00:00