Trichoplusia ni attacin A, a differentially displayed insect gene coding for an antibacterial protein

Gene ◽  
1996 ◽  
Vol 174 (2) ◽  
pp. 245-249 ◽  
Author(s):  
Daiwu Kang ◽  
Annika Lundström ◽  
Hâkan Steiner
Keyword(s):  
Trichoplusia Ni ◽  
Antibacterial Protein ◽  
Gene Coding ◽  
Attacin A

scholarly journals Novel Isolate of Bacillus thuringiensis subsp. thuringiensis That Produces a Quasicuboidal Crystal of Cry1Ab21 Toxic to Larvae of Trichoplusia ni

2007 ◽  
Vol 74 (4) ◽  
pp. 923-930 ◽  
Author(s):  
Izabela Swiecicka ◽  
Dennis K. Bideshi ◽  
Brian A. Federici
Keyword(s):  
Bacillus Thuringiensis ◽  
Trichoplusia Ni ◽  
Single Copy ◽  
Cabbage Looper ◽  
Beet Armyworm ◽  
Vegetable Crops ◽  
Gene Coding ◽  
Novel Variant ◽  
Northeastern Poland ◽  
Midgut Lumen

ABSTRACT A new isolate (IS5056) of Bacillus thuringiensis subsp. thuringiensis that produces a novel variant of Cry1Ab, Cry1Ab21, was isolated from soil collected in northeastern Poland. Cry1Ab21 was composed of 1,155 amino acids and had a molecular mass of 130.5 kDa, and a single copy of the gene coding for this endotoxin was located on a ∼75-kbp plasmid. When synthesized by the wild-type strain, Cry1Ab21 produced a unique, irregular, bipyramidal crystal whose long and short axes were both approximately 1 μm long, which gave it a cuboidal appearance in wet mount preparations. In diet incorporation bioassays, the 50% lethal concentrations of the crystal-spore complex were 16.9 and 29.7 μg ml−1 for second- and fourth-instar larvae of the cabbage looper, Trichoplusia ni, respectively, but the isolate was essentially nontoxic to larvae of the beet armyworm, Spodoptera exigua. A bioassay of autoclaved spore-crystal preparations showed no evidence of β-exotoxin activity, indicating that toxicity was due primarily to Cry1Ab21. Studies of the pathogenesis of isolate IS5056 in second-instar larvae of T. ni showed that after larval death the bacterium colonized and subsequently sporulated extensively throughout the cadaver, suggesting that other bacteria inhabiting the midgut lumen played little if any role in mortality. As T. ni is among the most destructive pests of vegetable crops in North America and has developed resistance to B. thuringiensis, this new isolate may have applied value.

Banded aggregates containing fibrillin are present in the cartilage matrix adjacent to chondrocytes in individuals affected with scoliosis

1992 ◽  
Vol 50 (1) ◽  
pp. 892-893
Author(s):  
Douglas R. Keene ◽  
Magaret Fairhurst ◽  
Catherine C. Ridgway ◽  
Lynn Y. Sakai
Keyword(s):  
Connective Tissue ◽  
Marfan Syndrome ◽  
Cross Section ◽  
Immunoelectron Microscopy ◽  
Cartilage Matrix ◽  
Negative Stain ◽  
Gene Coding ◽  
Rotary Shadowing

Matrix microfibrils are present in the connective tissue matrices of all tissues. Following standard TEM processing, they appear in cross section as cylindrical fibrils 8-10 nm in diameter, often associated with amorphous elastin. They are also seen in the absence of amorphous elastin, for example in the shallow papillary layer of skin, and also in cartilage matrix (Figure 1). Negative stain and rotary shadowing studies suggest that microfibrils are composed of laterally associated globular structures connected by fine filamentous strands (“ beaded strings”), and that they are extendable. Immunoelectron microscopy has demonstrated that fibrillin, a 350 Kd glycoprotein, is distributed along all microfibrils with a relaxed periodicity of about 54 nm The gene coding for fibrillin has recently been identified and is defective in the Marfan syndrome.

DETECTING MYCOBACTERIUM TUBERCULOSIS RAPIDLY AND MYCOBACTERIUM TUBERCULOSIS STRAINS WITHOUT IS6110 SEQUENCE BY PCR ASSAY

2012 ◽  
pp. 15-19
Author(s):  
Thi Chau Anh Nguyen ◽  
Hoang Bach Nguyen ◽  
Hai Duong Huynh ◽  
Nu Xuan Thanh Le ◽  
Xuan Cuong Le ◽  
...  
Keyword(s):  
Mycobacterium Tuberculosis ◽  
16S Rdna ◽  
False Negative ◽  
Clinical Samples ◽  
Tuberculosis Complex ◽  
Pcr Assay ◽  
Complex Objects ◽  
Method Performance ◽  
Gene Coding ◽  
16S Rdna Pcr

Background: The Nested IS6110 PCR is used for detecting tuberculosis, however IS6110 sequence is not present in the genome of all strains of M.tuberculosis, the result may be false negative. The gene coding 16S ribosome always contains a short sequence specific to M. tuberculosis complex. Objects: Performance of the 16S Real-time PCR to detect M. tuberculosis and combining to the nested IS6110 PCR to determine the rate of Mtb strains without IS6110 from clinical samples. Materials and method: Performance of 16S rDNA PCR by commercial kit of Viet A Inc. for all 480 samples, the samples which were positive with the 16S rDNA PCR were retested in IS6110 PCR assay by in-house kit. Results: The Realtime 16S rDNA PCR detected 258 cases (53.8%) of tuberculosis. There were 3 (1.2 %) M. tuberculosis strains which do not harbor IS6110 sequence in genome. Conclusion: The IS6110 nested PCR can be applied more widely than the 16S rDNA realtime PCR. In case of using IS6110 PCR assay, results may show a low proportion of false negative. Combining 16S rDNA PCR with the IS6110 based PCR allowed detection of deletion of IS6110 sequence in M. tuberculosis isolates.

PCR Amplification and Bioinformatics of a Novel Gene Coding Hydroxylamine Oxidoreductase*

2010 ◽  
Vol 2009 (1) ◽  
pp. 100-105
Author(s):  
Zuguo ZHAO ◽  
Qingxin KONG ◽  
Jingfeng WANG ◽  
Min JIN ◽  
Xinwei WANG ◽  
...  
Keyword(s):  
Pcr Amplification ◽  
Hydroxylamine Oxidoreductase ◽  
Novel Gene ◽  
Gene Coding

Creation of Plasmidless and Markerless Escherichia coli Succinate Producing Strain and Evaluation of its Biosynthetic Potential during Utilization of Lignocellulosic Sugars

2020 ◽  
Vol 36 (2) ◽  
pp. 3-11
Author(s):  
O.A. Zhuravliova ◽  
Т.А. Voeikova ◽  
A.Yu. Gulevich ◽  
V.G. Debabov
Keyword(s):  
Escherichia Coli ◽  
Succinic Acid ◽  
Plant Biomass ◽  
Anaerobic Fermentation ◽  
Basic Research ◽  
Acid Fermentation ◽  
Mixed Acid ◽  
Gene Coding ◽  
Lignocellulosic Sugars ◽  
Basic Research Project

The plasmidless and markerless Escherichia coli succinate producing strain SGM2.0Pyc-int has been engineered and characterized. The strain has the inactivated main mixed-acid fermentation pathways due to the deletions of ldhA,poxB, ackA,pta, and adhE genes, constitutively expresses the genes of the aceEF-lpdA operon encoding components of pyravate dehydrogenase complex, and possesses the chromosomally integrated Bacillus subtilis pycA gene coding for pyruvate carboxylase. The capacity of the strain to synthesize succinic acid in course of dual-phase aerobic-anaerobic fermentation with lignocellulosic sugars as substrates was studied. The SGM2.0Pyc-int strain synthesized succinic acid from glucose, xylose, and arabinose with a molar yields of 1.41 mol/mol, 1.18 mol/mol, and 1.18 mol/mol, respectively, during the anaerobic production stage. The constructed strain has great potential for developing efficient processes for the succinic acid production from plant biomass-derived sugars. Escherichia coli, fermentation, arabinose, glucose, xylose, succinic acid. The work was supported by a Grant from the Russian Foundation for Basic Research (Project no. 18-29-14005).

Expression of the NADP+-Dependent Formate Dehydrogenase Gene from Pseudomonas Increases the Lysine Production in Corynebacterium glutamicum

2019 ◽  
Vol 35 (6) ◽  
pp. 21-29
Author(s):  
T.E. Leonova ◽  
T.E. Shustikova ◽  
T.V. Gerasimova ◽  
Т.А. Ivankova ◽  
K.V. Sidorenko Sidorenko ◽  
...  
Keyword(s):  
Corynebacterium Glutamicum ◽  
Formate Dehydrogenase ◽  
Ministry Of Education ◽  
Lysine Production ◽  
Simultaneous Formation ◽  
Resource Center ◽  
Formate Oxidation ◽  
Gene Coding ◽  
Dehydrogenase Gene ◽  
Lysine Synthesis

Thepsefdh_D221Q gene coding for a mutant formate dehydrogenase (PseFDG_D221Q) from Pseudomonas, which catalyzes the formate oxidation with the simultaneous formation of NADPH, has been expressed in the cells of lysine-producing Corynebacterium glutamicum strains. The psefdh_D221Q gene was introduced into С. glutamicum strains as part of an autonomous plasmid or was integrated into the chromosome with simultaneous inactivation of host formate dehydrogenase genes. It was shown that the С. glutamicum strains with NADP+ -dependent formate dehydrogenase have an increased level of L-lysine synthesis in the presence of formate, if their own formate dehydrogenase is inactivated. L-lysine, formate dehydrogenase, NADPH, Corynebacterium glutamicum The work was carried out using the equipment of the Multipurpose Scientific This work was carried out on the equipment of the Multipurpose Scientific Installation of «All-Russian Collection of Industrial Microorganisms», National Bio-Resource Center, NRC «Kurchatov Institute»- GosNIIgenetika. This work was financially supported by the Ministry of Education and Science of Russia (Unique Project Identifier - RFMEFI61017X0011).

scholarly journals An Argonaute-Like Protein Is Required for Meiotic Silencing

Genetics ◽  
2003 ◽  
Vol 164 (2) ◽  
pp. 821-828 ◽  
Author(s):  
Dong W Lee ◽  
Robert J Pratt ◽  
Malcolm McLaughlin ◽  
Rodolfo Aramayo
Keyword(s):  
Sexual Development ◽  
Meiotic Silencing ◽  
Gene Coding

Abstract We demonstrate the involvement of suppressor of meiotic silencing-2 (sms-2+), a Neurospora gene coding for an Argonaute-like protein, in meiotic silencing and normal sexual development.

scholarly journals Isolating an active and inactive CACTA transposon from lettuce color mutants and characterizing their family

2021 ◽  
Author(s):  
Csanad Gurdon ◽  
Alexander Kozik ◽  
Rong Tao ◽  
Alexander Poulev ◽  
Isabel Armas ◽  
...  
Keyword(s):  
Anthocyanin Biosynthesis ◽  
Mobile Element ◽  
Bioinformatic Analysis ◽  
Relative Expression Level ◽  
Gene Coding ◽  
Genes Encoding ◽  
Key Enzyme ◽  
Natural Derivative ◽  
Dark Green ◽  
Transposon Insertions

Abstract Dietary flavonoids play an important role in human nutrition and health. Flavonoid biosynthesis genes have recently been identified in lettuce (Lactuca sativa); however, few mutants have been characterized. We now report the causative mutations in Green Super Lettuce (GSL), a natural light green mutant derived from red cultivar NAR; and GSL-Dark Green (GSL-DG), an olive-green natural derivative of GSL. GSL harbors CACTA 1 (LsC1), a 3.9-kb active nonautonomous CACTA superfamily transposon inserted in the 5′ untranslated region of anthocyanidin synthase (ANS), a gene coding for a key enzyme in anthocyanin biosynthesis. Both terminal inverted repeats (TIRs) of this transposon were intact, enabling somatic excision of the mobile element, which led to the restoration of ANS expression and the accumulation of red anthocyanins in sectors on otherwise green leaves. GSL-DG harbors CACTA 2 (LsC2), a 1.1-kb truncated copy of LsC1 that lacks one of the TIRs, rendering the transposon inactive. RNA-sequencing and reverse transcription quantitative PCR of NAR, GSL, and GSL-DG indicated the relative expression level of ANS was strongly influenced by the transposon insertions. Analysis of flavonoid content indicated leaf cyanidin levels correlated positively with ANS expression. Bioinformatic analysis of the cv Salinas lettuce reference genome led to the discovery and characterization of an LsC1 transposon family with a putative transposon copy number greater than 1,700. Homologs of tnpA and tnpD, the genes encoding two proteins necessary for activation of transposition of CACTA elements, were also identified in the lettuce genome.

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