Introduction of a chimeric gene encoding an oryzacystatin-β-glucuronidase fusion protein into rice protoplasts and regeneration of transformed plants

1995 ◽  
Vol 15 (3-4) ◽  
pp. 174-177 ◽  
Author(s):  
Hiroshi Hosoyama ◽  
Kentaro Irie ◽  
Keiko Abe ◽  
Soichi Arai
Keyword(s):  
Fusion Protein ◽  
Chimeric Gene ◽  
Gene Encoding ◽  
Transformed Plants

scholarly journals Modified Development in Transgenic Tobacco Plants Expressing a rolA∷GUS Translational Fusion and Subcellular Localization of the Fusion Protein

1998 ◽  
Vol 11 (9) ◽  
pp. 855-859 ◽  
Author(s):  
Françoise Vilaine ◽  
Jacques Rembur ◽  
Dominique Chriqui ◽  
Mark Tepfer
Keyword(s):  
Fusion Protein ◽  
Specific Activity ◽  
Gus Activity ◽  
Gus Gene ◽  
Leaf Extracts ◽  
Gene Encoding ◽  
Significant Similarity ◽  
Transformed Plants ◽  
Fusion Protein Expression ◽  
Rola Gene

The rolA gene is transferred naturally by Agrobacterium rhizogenes to the genome of host plants, where it induces dramatic changes in development of transformed plants, including dwarfism and leaf wrinkling. The predicted translation product of the rolA gene is a small (11.4 kDa), basic (pI = 11.2) protein, which has no clearly significant similarity to sequences in the data bases. We have introduced into the tobacco genome a gene encoding a rolA∷GUS fusion protein. Expression of this gene led to synthesis of an RNA and a protein of expected size, and the transformed plants exhibited the dwarfism and leaf wrinkling typical of rolA plants, but to a lesser degree than plants transformed with the wild-type rolA gene. The distribution of β-glucuronidase (GUS) activity was compared in subcellular fractions of leaf extracts from plants expressing either the rolA∷gus gene or a control gus construct. As expected, in the control plants, GUS activity was essentially cytosolic. In contrast, in plants expressing the rolA∷gus gene the highest specific activity was associated with the plasmalemma fraction.

Expression of a Chicken Ovalbumin Gene in Three Lucerne Cultivars

1991 ◽  
Vol 18 (5) ◽  
pp. 495 ◽  
Author(s):  
HE Schroeder ◽  
MRI Khan ◽  
WR Knibb ◽  
D Spencer ◽  
TJV Higgins
Keyword(s):  
Transgenic Plants ◽  
Alternative Interpretation ◽  
Cauliflower Mosaic Virus ◽  
Vector System ◽  
35S Promoter ◽  
Restriction Enzyme Digestion ◽  
Flanking Sequence ◽  
Gene Encoding ◽  
Transformed Plants ◽  
Chicken Ovalbumin

Routine procedures have been developed for the transformation of lucerne (Medicago sativa cv. Rangelander) with foreign genes using the Agrobacterium tumefaciens binary vector system and for the regeneration of transgenic plants from tissue culture, via somatic embryogenesis. Lucerne transformation was carried out with a gene encoding neomycin phosphotransferase (npt), which conferred resistance to the antibiotic kanamycin, together with a cDNA clone encoding chicken ovalbumin which was modified for expression in plant cells. The ovalbumin cDNA protein coding sequence was combined with the cauliflower mosaic virus 35S promoter and the nopaline synthase 3' flanking sequence to make a chimeric ovalbumin gene. A DNA construct containing both these genes was transferred to lucerne, and ovalbumin was detected in leaves of regenerated plants using protein immunoblots. Pulse-chase labelling experiments and analysis of leaves from the top to bottom of the transformed plants indicated that ovalbumin, once formed, was stable in the leaves of transgenic lucerne. A wide variation in ovalbumin level was frequently observed in plants regenerated from multiple embryos on a single transformed callus. This variation correlated with changes in the restriction enzyme digestion pattern of the ovalbumin DNA from the transgenic plants. These results indicate that each transformed callus may have arisen from more than one transformation event. An alternative interpretation is that the callus may have arisen from a single transformed cell but during cell proliferation the DNA in some cells may have undergone rearrangement prior to embryogenesis. Transformation and regeneration procedures were also developed for two Australian commercial cultivars of lucerne. Although the frequency of recovery of transformed plants was lower than with cv. Rangelander, these protocols open the way for a relatively rapid

The Drosophila pipsqueak gene encodes a nuclear BTB-domain-containing protein required early in oogenesis

Development ◽  
1996 ◽  
Vol 122 (6) ◽  
pp. 1859-1871 ◽  
Author(s):  
H. Horowitz ◽  
C.A. Berg
Keyword(s):  
Fusion Protein ◽  
Protein Interactions ◽  
Protein Isoforms ◽  
Follicle Cells ◽  
Protein Protein Interactions ◽  
Gene Encoding ◽  
Btb Domain ◽  
Multiple Transcripts ◽  
C Terminus ◽  
Evolutionarily Conserved

Mutations at the pipsqueak locus affect early patterning in the Drosophila egg and embryo. We have cloned pipsqueak and found that it is a large and complex gene, encoding multiple transcripts and protein isoforms. One protein, PsqA, is absent in all of the mutants that we have examined. We show that PsqA is a nuclear protein present in the germ cells and somatically derived follicle cells throughout oogenesis and that it is required prior to stage one of oogenesis. PsqA contains a BTB (POZ) domain at its amino terminus; additionally, we have identified an evolutionarily conserved motif of unknown function present four times in tandem at the C terminus of the protein. PZ pipsqueak mutants produce a putative fusion protein containing the pipsqueak BTB domain fused to sequences resident on the PZ element (H. Horowitz and C. Berg, 1995 Genetics 139, 327–335). We demonstrate here that expression of this fusion protein in wild-type flies has a dominant effect, resulting in infertility and eggshell defects. These dominant phenotypes are discussed in light of current theories on the role of the BTB domain in protein-protein interactions.

scholarly journals Expression in Bacteria of the Gene Encoding the gp43 Antigen of Paracoccidioides brasiliensis: Immunological Reactivity of the Recombinant Fusion Proteins

2002 ◽  
Vol 9 (6) ◽  
pp. 1200-1204 ◽  
Author(s):  
Susana N. Diniz ◽  
Kátia C. Carvalho ◽  
Patrícia S. Cisalpino ◽  
José F. Silveira ◽  
Luiz R. Travassos ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Amino Acids ◽  
Fusion Protein ◽  
Fusion Proteins ◽  
Inclusion Bodies ◽  
Paracoccidioides Brasiliensis ◽  
Immunological Reactivity ◽  
Gene Encoding ◽  
Recombinant Fusion Proteins ◽  
Gst Fusion Protein

ABSTRACT gp43 is the major diagnostic antigen of Paracoccidioides brasiliensis, the agent of paracoccidioidomycosis (PCM) in humans. In the present study, cDNA of the gp43 gene (PbGP43) was obtained by reverse transcriptase PCR, inserted into a pGEX vector in frame with the glutathione S-transferase (GST) gene, and expressed in Escherichia coli as inclusion bodies. Immunoblotting showed that all sera from patients with chronic pulmonary and acute lymphatic forms of PCM reacted with the recombinant fusion protein of the mature gp43 (381 amino acids). Reactivity with fusion proteins containing subfragments of the N-terminal, internal, or C-terminal regions occurred eventually, and the C-terminal region was the most antigenic. Lack of reactivity with the subfragments may be due to the conformational nature of the gp43 epitopes. Sera from patients with aspergillosis, candidiasis, and histoplasmosis did not react with the gp43-GST fusion protein. Our results suggest that recombinant gp43 corresponding to the processed antigen can be a useful tool in the diagnosis of PCM.

scholarly journals Novel Expression System for Large-Scale Production and Purification of Recombinant Class IIa Bacteriocins and Its Application to Piscicolin 126

2004 ◽  
Vol 70 (6) ◽  
pp. 3292-3297 ◽  
Author(s):  
Gerard M. Gibbs ◽  
Barrie E. Davidson ◽  
Alan J. Hillier
Keyword(s):  
Fusion Protein ◽  
Large Scale ◽  
Expression System ◽  
Reversed Phase ◽  
Scale Production ◽  
Gene Encoding ◽  
Strong Activity ◽  
E Coli ◽  
Large Scale Production ◽  
Bacterial Cell Membrane

ABSTRACT Piscicolin 126 is a class IIa bacteriocin isolated from Carnobacterium piscicola JG126 that exhibits strong activity against Listeria monocytogenes. The gene encoding mature piscicolin 126 (m-pisA) was cloned into an Escherichia coli expression system and expressed as a thioredoxin-piscicolin 126 fusion protein that was purified by affinity chromatography. Purified recombinant piscicolin 126 was obtained after CNBr cleavage of the fusion protein followed by reversed-phase chromatography. Recombinant piscicolin 126 contained a single disulfide bond and had a mass identical to that of native piscicolin 126. This novel bacteriocin expression system generated approximately 26 mg of purified bacteriocin from 1 liter of E. coli culture. The purified recombinant piscicolin 126 acted by disruption of the bacterial cell membrane.

scholarly journals Structure and expression of the human gene encoding major heat shock protein HSP70.

1985 ◽  
Vol 5 (2) ◽  
pp. 330-341 ◽  
Author(s):  
B Wu ◽  
C Hunt ◽  
R Morimoto
Keyword(s):  
Heat Shock ◽  
Heat Shock Protein ◽  
Genomic Library ◽  
Human Gene ◽  
Chimeric Gene ◽  
Hsp70 Gene ◽  
Gene Encoding ◽  
Hsp70 Mrna ◽  
Flanking Sequences ◽  
Heat Shock Protein Hsp70

We have cloned a human gene encoding the 70,000-dalton heat shock protein (HSP70) from a human genomic library, using the Drosophila HSP70 gene as a heterologous hybridization probe. The human recombinant clone hybridized to a 2.6-kilobase polyadenylated mRNA from HeLa cells exposed to 43 degrees C for 2 h. The 2.6-kilobase mRNA was shown to direct the translation in vitro of a 70,000-dalton protein similar in electrophoretic mobility to the HSP70 synthesized in vivo. From the analysis of S1 nuclease-resistant mRNA-DNA hybrids, the HSP70 gene appears to be transcribed as an uninterrupted mRNA of 2.3 kilobases. We show that the cloned HSP70 gene contains the sequences necessary for heat shock-induced expression by two criteria. First, hamster cells transfected with a subclone containing the HSP70 gene and flanking sequences synthesized a HSP70-like protein upon heat shock. Second, human cells transfected with a chimeric gene containing the 5' flanking sequences of the HSP70 gene and the coding sequences of the bacterial chloramphenicol acetyltransferase gene transcribed the chimeric gene upon heat shock. We show that the HSP70 mRNA transcribed in an adenovirus 5 transformed human cell line (293 cells) is identical to the HSP70 mRNA induced by heat shock.

scholarly journals Epitope Mapping of the Brucella melitensis BP26 Immunogenic Protein: Usefulness for Diagnosis of Sheep Brucellosis

2003 ◽  
Vol 10 (4) ◽  
pp. 647-651 ◽  
Author(s):  
Patricia Seco-Mediavilla ◽  
Jean-Michel Verger ◽  
Maggy Grayon ◽  
Axel Cloeckaert ◽  
Clara M. Marín ◽  
...  
Keyword(s):  
Fusion Protein ◽  
Epitope Mapping ◽  
Recombinant Dna ◽  
Brucella Melitensis ◽  
Recombinant Fusion Protein ◽  
Immunogenic Protein ◽  
Nucleotide Substitutions ◽  
Gene Encoding ◽  
Recombinant Dna Techniques ◽  
Reference Strains

ABSTRACT Sequencing of bp26, the gene encoding the Brucella sp. immunogenic BP26 periplasmic protein, was performed in the reference strains of Brucella abortus, B. suis, and B. ovis. The three bp26 sequences were almost identical to that published for B. melitensis 16M bp26, and only minor nucleotide substitutions, without modifying the amino acid sequence, were observed between species. The bp26 genes of the seven B. abortus biovar reference strains and B. abortus S19 and RB51 vaccine strains were also sequenced. Again, only minor differences were found. Surprisingly, the bp26 nucleotide sequence for B. abortus S19 was almost identical to that found for B. melitensis 16M and differed from the sequence described previously by others (O. L. Rossetti, A. I. Arese, M. L. Boschiroli, and S. L. Cravero, J. Clin. Microbiol. 34:165-169, 1996) for the same B. abortus strain. The epitope mapping of BP26, performed by using a panel of monoclonal antibodies and recombinant DNA techniques, allowed the identification of an immunodominant region of the protein interesting for the diagnosis of B. melitensis and B. ovis infection in sheep. A recombinant fusion protein containing this region of BP26 reacted indeed, in Western blotting, as the entire recombinant BP26 against sera from B. melitensis- or B. ovis-infected sheep while it avoided false-positive reactions observed with sera from Brucella-free sheep when using the entire recombinant BP26. Thus, use of this recombinant fusion protein instead the entire recombinant BP26 could improve the specific serological diagnosis of B. melitensis or B. ovis infection in sheep.

Sequence of a Leishmania major gene encoding an ubiquitin fusion protein

Gene ◽  
1993 ◽  
Vol 131 (1) ◽  
pp. 155-156 ◽  
Author(s):  
Georgia R. Graeff ◽  
Phillip M. Steele ◽  
Cynthia L. Peterson ◽  
Michele L. Bennett ◽  
Pamela J. Langer
Keyword(s):  
Fusion Protein ◽  
Leishmania Major ◽  
Major Gene ◽  
Gene Encoding
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