abstract：:Plasmid deletion formation was compared in wild-type, recE4, and addB72 strains of Bacillus subtilis. Deletion frequencies in plasmid pGP1, as monitored with a penP-lacZ fusion, were low in recE4 and high in addB72, in comparison to the wild-type strain. In the wild-type and recE4 strains, deletions between directly r...

journal_title：Plasmid

authors： Peijnenburg AC,Breed PV,Bron S,Venema G

更新日期：1989-05-01 00:00:00

abstract：:Previous explanations of why bacterial genes for certain "optional" traits tend to occur on plasmids rather than chromosomes are based on an outdated misunderstanding of natural selection. They also fail to explain why certain characters that are ubiquitous in some bacterial species tend to occur on plasmids. This pap...

journal_title：Plasmid

authors： Eberhard WG

更新日期：1989-05-01 00:00:00

abstract：:A simple mathematical model of drug-induced plasmid elimination (curing) considering density-dependent growth rates and plasmid transfers is presented. It describes nonlinear population dynamics of conjugative plasmids during in vitro curing experiments in batch culture. The model was tested on kinetics of acridine or...

journal_title：Plasmid

authors： Sýkora P,Foltýnova Z,Smitálova K

更新日期：1989-03-01 00:00:00

abstract：:In order to study the in vivo assembly of chromatin on prokaryotic DNA templates, we have transformed yeast cells with plasmids pAJ50 and pRB58, which contain pBR322 sequences. In both cases nucleosomes are assembled in vivo on pBR322 DNA, although the nucleosomes are not homogeneous in size. To explore whether there ...

journal_title：Plasmid

authors： Estruch F,Pérez-Ortín JE,Matallana E,Franco L

更新日期：1989-03-01 00:00:00

abstract：:pSAM2 is an 11-kb plasmid integrated in the Streptomyces ambofaciens ATCC23877 and ATCC15154 genomes and found additionally as a free replicon in an uv derivative. After transfer into S. ambofaciens DSM40697 (devoid of pSAM2) or into Streptomyces lividans, specific integration of pSAM2 occurred very efficiently. A 58-...

journal_title：Plasmid

authors： Boccard F,Smokvina T,Pernodet JL,Friedmann A,Guérineau M

更新日期：1989-01-01 00:00:00

abstract：:Tn1935, a 23.5-kb transposon mediating resistance to ampicillin, kanamycin, mercury, spectinomycin, and sulfonamide was isolated from pZM3, an IncFIme virulence plasmid from Salmonella wien. Tn1935 possesses the entire sequence of Tn21 and contains two additional DNA segments of 0.95 and 2.7 kb carrying the ampicillin...

journal_title：Plasmid

authors： Colonna B,Bernardini M,Micheli G,Maimone F,Nicoletti M,Casalino M

更新日期：1988-11-01 00:00:00

abstract：:Taking advantage of the plaque morphology method, we detected two single-stranded initiation (ssi) signals in the plasmid pSY343; one was in the 170-nucleotide (nt) EcoRV-ThaI segment (170P), and the other was in the 93-nt DraI-FnuDII segment (93F), which were designated as ssiA and ssiB, respectively. We cloned the t...

journal_title：Plasmid

authors： Bahk JD,Kioka N,Sakai H,Komano T

更新日期：1988-11-01 00:00:00

abstract：:The structural and functional properties of mercury resistance determinants cloned from a series of independently isolated conjugative plasmids were compared with those of the prototype HgR determinants from Tn501 and plasmid R100 (containing Tn21). Restriction endonuclease mapping classified the HgR determinants into...

journal_title：Plasmid

authors： Jobling MG,Peters SE,Ritchie DA

更新日期：1988-09-01 00:00:00

abstract：:With the mutagenesis of specific, virulence-associated genes of Legionella pneumophila as the eventual goal, methods for gene transfer to these bacteria were developed. Following the observations of others that conjugative, broad-host-range plasmids could be transferred from Escherichia coli to L. pneumophila at low f...

journal_title：Plasmid

authors： Engleberg NC,Cianciotto N,Smith J,Eisenstein BI

更新日期：1988-07-01 00:00:00

abstract：:A cell clone (cl.2) having an atypical transformed morphology was isolated from a murine C127 cell culture experimentally infected with a bovine papillomavirus type 1 (BPV-1) virion preparation. cl.2 cells exhibited minimal transformed characteristics and contained multiple copies of a BPV-1 plasmid with a molecular s...

journal_title：Plasmid

authors： Burnett S,Moreno-Lopez J,Pettersson U

更新日期：1988-07-01 00:00:00

abstract：:A new class of binary vectors has been constructed, containing the origin of replication of the W-type plasmid Sa. These vectors are designed to express foreign genes in plants under control of the TR gene 2' promoter or the promoter of a light-inducible ribulose-1,5-bisphosphate carboxylase small subunit gene of Arab...

journal_title：Plasmid

authors： Alliotte T,Zhu LH,Van Montagu M,Inzé D

更新日期：1988-05-01 00:00:00

abstract：:Nucleotide sequence analysis of the Tn4451-deletion derivatives, pJIR47 and pJIR86, which were derived from Escherichia coli and Clostridium perfringens, respectively, showed that the deletion events that led to the formation of these plasmids were identical and precise. The results also showed that the termini of thi...

journal_title：Plasmid

authors： Abraham LJ,Rood JI

更新日期：1988-03-01 00:00:00

abstract：:A variant of the cryptic plasmid of Neisseria gonorrhoeae, 4.4 kb in size, was isolated and characterized at the molecular level. This variant harbored a 156-bp insertion which was located between coordinates 3134 and 3135 within the putative cppB gene using the 4.2-kb cryptic plasmid, pJD1, as a reference. The insert...

journal_title：Plasmid

authors： Roy RN,Bigelow N,Dillon JA

更新日期：1988-01-01 00:00:00

abstract：:Mud (mini-Mu) transposons are defective phage Mu genomes that conserve the Mu ends. The transduction of Mud transposons is strictly dependent on Mu complementation, inefficient, and affected by modifications in the Mud internal sequences. The transduction of Mud transposons depends on transposition, which appears to b...

journal_title：Plasmid

authors： Reyes O,Beyou A,Mignotte-Vieux C,Richaud F

更新日期：1987-11-01 00:00:00

abstract：:The gene(s) for chromosome-mediated beta-lactamase production of Proteus vulgaris GN7919 was cloned into a unique EcoRI site of pACYC184 as an insert of a 14.2-kb fragment, which was further digested into two fragments with EcoRI, 4.9 and 9.3 kb. The restriction enzyme digestion pattern of the recombinant plasmid, des...

journal_title：Plasmid

authors： Maejima T,Ohya Y,Mitsuhashi S,Inoue M

更新日期：1987-09-01 00:00:00

abstract：:The region responsible for the maintenance of the prophage of bacteriophage P7 as a stable, unit-copy plasmid was isolated in a lambda att vector which lysogenizes Escherichia coli as a stable unit-copy plasmid under the control of the P7 replication origin. The P7 plasmid-maintenance region was shown to consist of ad...

journal_title：Plasmid

authors： Ludtke DN,Austin SJ

更新日期：1987-07-01 00:00:00

abstract：:A transient expression system has been developed to compare the relative efficiency of expression of various vaccinia virus DNA sequences containing transcriptional regulatory elements. A plasmid vector was constructed containing both the Escherichia coli galactokinase gene (galK) and the guanine phosphoribosyltransfe...

journal_title：Plasmid

authors： Shepard B,Panicali D,Huang C

更新日期：1987-07-01 00:00:00

abstract：:We report the characterization of Tn602, a transposon encoding resistance to kanamycin and related aminoglycosides present on the R-plasmid pGD10. Tn602 is highly homologous to the previously characterized Tn903, present on the R-plasmid R6, in that it consists of a gene for aminoglycoside-phosphotransferase-3'-I (hom...

journal_title：Plasmid

authors： Stibitz S,Davies JE

更新日期：1987-05-01 00:00:00

abstract：:The incompatibility region of the Streptomyces plasmid pSL1 was identified as a 240-bp segment, though some other function from the vector plasmid was also necessary. A 540-bp fragment including the 240-bp region was enough for full expression of incompatibility. Inserted mutation analysis led to a more detailed locat...

journal_title：Plasmid

authors： Urabe H,Shindoh Y,Nakano MM,Ogawara H

更新日期：1987-03-01 00:00:00

abstract：:The conjugative shuttle transposon Tn1545 from Streptococcus pneumoniae confers resistance to kanamycin (aphA-3), erythromycin (ermAM), and tetracycline (tetM). The 25.3-kb element is self-transferable to various gram-positive bacterial genera where it transposes. Tn1545 is also capable of transposition, but not of co...

journal_title：Plasmid

authors： Caillaud F,Carlier C,Courvalin P

更新日期：1987-01-01 00:00:00

abstract：:Restriction map of the 72-kb virulence plasmid isolated from Yersinia enterocolitica O:3 was generated using EcoRI, BamHI, HindIII, and XbaI restriction enzymes. The mapping was done after cloning all of the 13 BamHI fragments of the plasmid in Escherichia coli. In addition, the restriction enzyme analysis revealed tw...

journal_title：Plasmid

authors： Pulkkinen L,Granberg I,Granfors K,Toivanen A

更新日期：1986-11-01 00:00:00

abstract：:A procedure for the isolation of closed circular mitochondrial DNA (mtDNA) from cells permeabilized with digitonin is described. Compared to the standard procedure in which cells are broken after osmotic swelling, the digitonin-based procedure is more consistent and results in higher mtDNA yields. ...

journal_title：Plasmid

authors： Howell N,Nalty MS,Appel J

更新日期：1986-07-01 00:00:00

abstract：:The large, 350-kb Sym (symbiotic) plasmid pRjaUSDA193 of Rhizobium fredii was examined to determine the frequency of repeated sequences present and to produce a physical and genetic map of a large region of the plasmid. A novel hybridization method, the Southern Cross, revealed that the plasmid pRjaUSDA193 contained m...

journal_title：Plasmid

authors： Masterson RV,Atherly AG

更新日期：1986-07-01 00:00:00

abstract：:Functional analysis of cloned genes often makes use of complementation after introducing these genes into cells of a mutant strain. Problems with this self-cloning step in the cyanobacterium Anacystis nidulans R2 have been encountered, which were mainly due to recombinational instability of gene and vector after trans...

journal_title：Plasmid

authors： Kuhlemeier CJ,Hardon EM,van Arkel GA,van de Vate C

更新日期：1985-11-01 00:00:00

abstract：:Strain LBG A3136 of Nocardia mediterranei (ETH Collection) was found to contain a low-copy-number covalently closed circular extrachromosomal element, pMEA 100, which could only be isolated from mycelium grown on agar plates. pMEA 100 could not be isolated from the closely related strain ATCC 13685. Hybridization expe...

journal_title：Plasmid

authors： Moretti P,Hintermann G,Hütter R

更新日期：1985-09-01 00:00:00

abstract：:Identification of the Sym plasmid in Rhizobium phaseoli strain RCC3622 is described. Introduction of this plasmid into R. trifolii or Agrobacterium tumefaciens strains resulted in bacteria capable of forming characteristic spherical root nodules on beans. This Sym plasmid, designated pSym9, was characterized as 275 MD...

journal_title：Plasmid

authors： Hooykaas PJ,den Dulk-Ras H,Regensburg-Tuïnk AJ,van Brussel AA,Schilperoort RA

更新日期：1985-07-01 00:00:00

abstract：:A plasmid vector for cloning in Bacillus sphaericus 1593 was constructed in B. subtilis from two parent plasmids, pBC16 and pBD64. When characterized, the 3.9-MDa chimeric plasmid pNN101 was found to consist of the MspI fragment containing the chloramphenicol acetyltransferase (CAT) gene from pBD64 inserted into an Ms...

journal_title：Plasmid

authors： Norton NB,Orzech KA,Burke WF Jr

更新日期：1985-05-01 00:00:00

abstract：:Unequal crossing-over is involved in genetic duplication and deletion in such diverse genetic systems as Drosophila, bacteria, and animal viruses. It is proposed to be involved in the form of unequal sister chromatid exchange in gene amplification in cultured animal cells and during carcinogenesis. Studies of the proc...

journal_title：Plasmid

authors： Clevenger W,Reeves R,Pall ML

更新日期：1985-05-01 00:00:00

abstract：:A restriction enzyme map of the IncFI plasmid ColV2-K94 was generated using EcoRI, BamHI, HindIII, and XhoI; the genetic features of this element were then mapped from previous heteroduplex studies. ...

journal_title：Plasmid

authors： Weber PC,Palchaudhuri S

更新日期：1985-05-01 00:00:00

abstract：:A circular map of the IncHI plasmid R27 corresponding to a genome size of 182 kb was established using the restriction endonucleases ApaI, XbaI, and PstI. The map was derived from the results obtained by hybridizing individual ApaI and XbaI fragments to blotted digests of the plasmid, as well as from complete and part...

journal_title：Plasmid

authors： Taylor DE,Brose EC

更新日期：1985-01-01 00:00:00

abstract：:The cloning of the finO region from the antibiotic-resistance plasmid R6-5 is reported. On the basis of DNA deletion analysis and Tn5 transposon insertional mutagenesis of finO+ chimeric plasmids, finO has been located within the coordinates 94.0-94.85 on the R6-5 map. A 32,000-Da polypeptide (32K), which is encoded w...

journal_title：Plasmid

authors： Cheah KC,Ray A,Skurray R

更新日期：1984-11-01 00:00:00

abstract：:Results of restriction endonuclease analysis and Southern blot hybridization suggest that the R-plasmids from Vibrio anguillarum strains isolated in Japan can be divided into at least four groups of homology depending on the time of their isolation and geographical source. Molecular cloning experiments allowed identif...

journal_title：Plasmid

authors： Mitoma Y,Aoki T,Crosa JH

更新日期：1984-11-01 00:00:00

abstract：:The construction of a set of new plasmids that are suitable as general cloning vectors in Escherichia coli and Agrobacterium tumefaciens is described. Plasmid pUCD2 is amplifiable in E. coli, replicates in a wide range of gram-negative hosts and contains a number of useful restriction endonuclear cleavage sites and an...

journal_title：Plasmid

authors： Close TJ,Zaitlin D,Kado CI

更新日期：1984-09-01 00:00:00

abstract：:The effects of mutations have been studied within the apocytochrome b gene on the processing of transcripts from the gene for subunit 1 of cytochrome c oxidase (coxI). Most mutations which affect the expression of the reading frame encoded by the fourth intron of the apocytochrome b gene (bI4) result in a failure to r...

journal_title：Plasmid

authors： Hensgens LA,Van der Horst G,Grivell LA

更新日期：1984-07-01 00:00:00

abstract：:Transposon-insertion mutants with vir- Ti plasmids were characterized and then used in complementation experiments. One of the mutants (LBA 1517) had a mutation in a newly discovered vir locus called virF. The virF mutation led to a strongly diminished virulence on tomato and tobacco, but not on certain other plant sp...

journal_title：Plasmid

authors： Hooykaas PJ,Hofker M,den Dulk-Ras H,Schilperoort RA

更新日期：1984-05-01 00:00:00

abstract：:The galactose operon of Escherichia coli K-12 has been used as a phenotypic marker for miniplasmids derived in vitro from R plasmids representing six incompatibility groups. This has enabled the development of a rapid incompatibility typing scheme in which the miniplasmids are used as incompatibility exemplars, their ...

journal_title：Plasmid

authors： Davey RB,Bird PI,Nikoletti SM,Praszkier J,Pittard J

更新日期：1984-05-01 00:00:00

abstract：:A suppressor of the mutations which inhibit the establishment of lysogeny in Pseudomonas aeruginosa has been found to be encoded by P. aeruginosa plasmids of four separate incompatibility groups. The wide distribution of this phenotype (designated Sly for suppressor of lysogeny establishment deficiency) indicates that...

journal_title：Plasmid

authors： Mondello FJ,Miller RV

更新日期：1984-03-01 00:00:00

abstract：:pHH6000 is a composite replicon made by the in vitro ligation of the IncP plasmid RP4 to a fragment of bacteriophage lambda capable of autonomous replication. Derivatives were selected in which it had integrated into the Escherichia coli chromosome by homologous recombination with the resident lambda prophage, and pla...

journal_title：Plasmid

authors： Grinter NJ

更新日期：1984-01-01 00:00:00

abstract：:Ten strains of Rhodopseudomonas sphaeroides were analyzed by agarose gel electrophoresis for plasmid DNA content and, by filter-hybridizations, for their molecular relationships. All strains examined contained at least one plasmid. Several strains carried as many as six different plasmid species with sizes ranging fro...

journal_title：Plasmid

authors： Fornari CS,Watkins M,Kaplan S

更新日期：1984-01-01 00:00:00

abstract：:A combined physical and functional map of plasmid RP4 is presented including the sites for 18 restriction endonucleases. Several cleavage sites of SphI, BalI, and ApaI are suitable for the dissection of the transfer gene regions. Recombinant plasmids containing RP4 SphI fragments were constructed to assist in localizi...

journal_title：Plasmid

authors： Lanka E,Lurz R,Fürste JP

更新日期：1983-11-01 00:00:00