• Title/Summary/Keyword: cyt gene

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Cloning of a Hemolytic Mosquitocidal Delta-endotoxin Gene (cyt) of Bacillus thuringiensis 73E10-2 (serotype 10) into Bacillus subtilis and Characterization of the cyt Gene Product

  • Kim, Kwang-Hyeon;Ohba, Michio;Kim, Byung-Woo
    • Journal of Microbiology and Biotechnology
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    • v.6 no.5
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    • pp.326-330
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    • 1996
  • To illustrate whether a hemolysin in $\delta$-endotoxins of Bacillus thuringiensis strain 73E10-2 and subsp. israelensis had immunological identity, a cyt gene of the strain 73E10-2 which encodes a hemolysin was cloned to B. subtilis (transformant 2753). The transformant 2753 containing cyt gene produced the hemolysin which lysed sheep erythrocytes after treatment of proteinase K. The hemolysin was proved also to be toxic against mosquito larvae (Aedes aegypti). The molecular weight of the hemolysin produced from the transformant 2753 was determined to be about 25 kDa by SDS-PAGE and immunoblot. The hemolysin in $\delta$-endotoxin of subsp. israelensis and subsp. kyushensis did not react on immunoblot using polyclonal anti-$\delta$-endotoxin of the strain 73E10-2, but 70-140 kDa mosquitocidal toxins in $\delta$-endotoxin of subsp. kyushuensis reacted.

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Expression of Human Cytochrome b5 in Zebrafish (Zebrafish에서 human cytochrome b5의 발현)

  • Han, Se Mi;Yoo, Min
    • Journal of Life Science
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    • v.27 no.6
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    • pp.617-622
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    • 2017
  • In this study, we sought to develop an effective cloning system by which human cytochrome $b_5$ (cyt $b_5$) is introduced and expressed in zebrafish. First, the 414 bp human cyt $b_5$ gene was amplified from RNA extracts of HeLa cells using RT-PCR, and the amplicon was subsequently sequenced to confirm that it was intact. Next, cyt $b_5$ was cloned into the pEGFP-N3 vector, which also encodes a fluorescent gene. One-cell stage zebrafish embryos were microinjected with the recombinant vector containing the cyt $b_5$ gene. Fluorescence microscopy confirmed high expression of the fluorescent gene in the injected fry compared to the non-fluorescent control fry. Finally, we extracted RNA from the injected fry and performed RT-PCR to determine whether the human cyt $b_5$ gene is expressed in the transgenic zebrafish. Sequencing analysis further confirmed that the cloned human cyt $b_5$ gene was intact. The transgenic zebrafish model produced in this study will be a useful tool to study therapeutic approaches to cure various diseases related to the deficiency of functional human cyt $b_5$ as well as tools for cloning useful genes in fish.

Additional mitochondrial DNA sequences from the dung beetle, Copris tripartitus (Coleoptera: Scarabaeidae), an endangered species in South Korea

  • Hwang, Eun Ju;Jeong, Su Yeon;Wang, Ah Rha;Kim, Min Jee;Kim, Iksoo
    • International Journal of Industrial Entomology and Biomaterials
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    • v.36 no.2
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    • pp.31-41
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    • 2018
  • The dung beetle, Copris tripartitus (Coleoptera: Scarabaeidae), is an endangered insect in South Korea. Previously, partial mitochondrial COI and CytB gene sequences have been used to infer genetic diversity and gene flow of this species in South Korea. In this study, we additionally collected C. tripartitus (n = 35) from one previous locality and two new localities, sequenced COI and CytB genes, and combined these with preexisting data for population genetic analysis. Sequence divergence of current samples showed slightly lower values [4.86% (32 bp) for COI and 4.16% (18 bp) for CytB] than that in the previous study. Nucleotide diversity (${\pi}$) ranged from 0.005336 (Gulupdo) to 0.020756 (Seogwi-dong) in COI and 0.009060 (Aewol-eup) to 0.017464 (Seogwi-dong) in CytB. Seogwi-dong samples that showed the highest ${\pi}$ in the previous study also showed the highest ${\pi}$ in this study for both gene sequences. The newly investigated Gulupdo samples had the lowest haplotype diversity for both gene sequences. They also had the lowest ${\pi}$ for COI and the second lowest ${\pi}$ for CytB. On the other hand, the newly added Haean-dong sample had relatively higher diversity estimates. Gene flow among populations was high, although significant difference was only detected between Gulupdo and Anmado or between Gulupdo and Seogwi-dong for COI sequences (P < 0.05). Considering the high genetic diversity and gene flow in C. tripartitus populations, one major issue regarding conservation seems not to be recovery of genetic diversity.

Effects of Chiyangtang on Helicobacter pylori-induced increase of cytokines gene expression (Helicobacter pylori 감염에 의한 Cytokines 유전자 발현에 대한 치양탕(治瘍湯)의 효과)

  • Lee, Hyung-Ju;Won, Jin-Hee;Moon, Goo;Moon, Seok-Jae;Park, Dong-Won
    • The Journal of Internal Korean Medicine
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    • v.20 no.1
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    • pp.99-110
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    • 1999
  • Effects of Chiyangtang(CYT) on H. pylori-induced increase of interleukin 8 and interleukin 1 gene expression was studied in Kato Ⅲ cell line, a human stomach epithelial cell line. Treatment of H. pylori to the cell culture signifant!y increased IL-8 and IL-1 mRNA synthesis. When CYT was added along with H. pylori, the increase of IL-8 and IL-1 mRNA synthesis was blocked. Activation of transcription factor $NF-{\kappa}B$ and AP-1 which were known to important in IL-8 and IL-1 gene expression was also studied using chloramphenicol acetyltransferase(CAT) assay. Treatment of H. pylori increased activation of $NF-{\kappa}B$ and AP-l and CYT effectively protected the activation. Electrophoretic mobility shift assay suggested that CYT effectively inhibited DNA binding of $NF-{\kappa}B$ and AP-l to their cognate site. These results suggested that CYT could prevent stomach diseases through the down regulation of IL -8 and IL-l gene expression which might be mediated by the inhibition of $NF-{\kappa}B$ and AP-1 activities and their binding to DNA.

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Identification of Meat Species Using PCR-RFLP Marker of Cytochrome b Gene

  • Shin, Sung-Chul;Chung, Ku-Young;Chung, Eui-Ryong
    • Food Science of Animal Resources
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    • v.26 no.3
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    • pp.375-379
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    • 2006
  • Food labeling regulations require that the meat species in various meat products are accurately declared to the consumer. Substitution or adulteration of costly meat with a cheaper one is one of the most common problems in the meat industry. In this study, PCR-restriction fragment length polymorphism(RFLP) method of the mitochondrial cytochrome b(mt cyt b) gene has been applied for identification of the origin of six mammalian meat species(beef, port horse, goat, mutton and deer) and three poultry meat species(chicken, turkey and duck) as raw materials for meat products. PCR was used to amplify a variable region of mt cyt b gene. Meat species differentiation was determined by digestion of the amplified products with a 359 bp fragment using HaeIII and HinfI restriction enzymes, which generated species-specific RFLP patterns. This PCR-RFLP DNA marker of mt cyt b gene could be very useful for the accurate and reliable identification and discrimination of animal meat species in routine analysis.

The Genetic Approach on Analyzing the Habitat Characteristics of Fairy Pitta Pitta Nympha Inhabiting Jeju Island, the Korean Peninsula and Taiwan (제주도, 한반도 및 대만 내 팔색조의 생태적 서식특성 분석을 위한 유전적 접근)

  • Kim, Eun-Mi;Jeon, Yeon-Seon;Kim, Se-Jae;Kang, Chang-Wan;Won, Hyun-Kyu;Jeong, Gil-Sang
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.17 no.1
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    • pp.81-90
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    • 2014
  • A Fairy Pitta is a bird known to breed only in mainland China, Taiwan, Japan and Korea and is listed as Vulnerable in the IUCN Red List. We carried out a DNA analysis to contribute to conserve the genetic diversity of Fairy Pitta. 32 samples were collected at Jeju Island, the Korean Peninsula and Taiwan from 2004 to 2013 and DNA was extracted from them and several sequences were amplified-it through PCR. And then we performed the population genetic analysis. We found there was a transversion between nucleotide sequences at CO1 gene, while there was no changes at Cyt-b gene. And we confirmed the polymorphism from two genes was caused from genetic drift not from selection. Through this analysis, the group within the Peninsula was found bigger than other two groups based on the analysis of CO1 gene, and the group from Taiwan was found bigger than other two groups through the analysis of Cyt-b gene. The population genetic structure of mitochondria gene of three group was showing CO1 gene had 5 haplotypes and Cyt-b gene had 6 haplotypes. Haplotype 2 in CO1 gene was found in three group and many individuals of samples had this haplotype. Like CO1 gene, haplotype 2 in Cyt-b gene was found in three group and was included in plenty of individuals. Other haplotypes were not overlaped and broke off among the three groups. To prevent from the extinction of Fairy Pitta and to obtain the genetic diversity, we need to compare with other regional group such as Japan, China and perform additional research in the non-breeding area.

Genetic Phylogeny among Three Species Red Seabream, Black Seabream and Rock Bream Based on Mitochondrial DNA Sequences

  • Kim, Mi-Jung;An, Hye-Suck;Kim, Kyung-Kil;Park, Jung-Youn
    • Fisheries and Aquatic Sciences
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    • v.12 no.3
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    • pp.171-178
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    • 2009
  • The Perciformes include approximately 40% of all bony fishes and are the largest order of vertebrates. This order includes some of the most economically relevant marine fishes, particularly the red seabream, black seabream and rock bream. A 409 bp fragment of the cytochrome b (cyt b) gene and 403 bp and 518 bp fragments of ribosomal RNA (12S and 16S rRNA, respectively) were sequenced from five populations of natural and cultured red seabreams, natural black seabream, and natural and cultured rock breams. The mitochondrial DNA sequences were utilized for the genetic identification and population structural analyses of these three species. Phylogenetic relationships of intra- and inter-species were elucidated using three types of molecular genetic markers from three species of the order Perciformes in Korea. We noted no significant differences in the intra-specific variation of the cyt b and rRNA genes in each population however, inter-specific divergences were greater than intra-specific variation. Inter-specific variation was induced more by transition than transversion type in the cyt b and rRNA genes. The cyt b gene and rRNA genes make it possible to determine the inter-species divergence. The rRNA genes have more conserved sequences than the cyt b gene. Therefore, these genes are expected to prove useful among species belonging to the different genera or families.

Toxin Gene Profiling of Bacillus cereus Food Isolates by PCR

  • Seong, Seon-Je;Lim, Ji-Su;Lee, Kwang-Geun;Lee, Seung-Ju;Hong, Kwang-Won
    • Applied Biological Chemistry
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    • v.51 no.4
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    • pp.263-268
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    • 2008
  • Seventy-one Bacillus cereus strains (12 references and 59 food isolates) were analyzed for the occurrence of five different enterotoxin genes (nheABC, hblCDA, entFM, cytK, and bceT) and one emetic toxin cereulide synthetase gene (ces) by PCR (polymerase chain reaction). PCR analysis revealed eight toxigenic patterns in all B. cereus strains tested; they all carried both entFM and nheABC. The presence of hblCDA, cytK, and bceT varied according to the enterotoxin-producing strains, among which hblCDA was the least frequently detected in the food-isolated strains. Only five B. cereus strains harbored ces, associated with the emetic type of food poisoning; however, these strains were devoid of hblCDA, cytK, and bceT.

Molecular Phylogeny and Distribution of Far Eastern Oryzias latipes Based on Mitochondrial Cytochrome b Gene Sequence (미토콘드리아 cytochrome b 유전자 염기서열 분석에 의한 극동지역 송사리의 계통과 지리적 분포의 상관관계)

  • Eah, Jae-Yong;Yoo, Jeong-Ha;Kang, Tae-Wook;Kim, Moo-Sang;Kim, Chang-Bae
    • Korean Journal of Ichthyology
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    • v.18 no.1
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    • pp.12-19
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    • 2006
  • To examine the relationship of geological distribution and phylogenetic tree of O. latipes in the Far East, we analyzed cytochrome b (cyt b) gene in the mitochondrial genome. In this study we employed the entire sequence of cyt b of 53 samples collected from nine Korean locations and 117 cyt b data retrieved from the GenBank. From 170 Oryzias latipes cyt b sequence data, 142 different haplotypes were identified and phylogenetic relationship was reconstructed based on the dataset. According to the phylogeny, haplotypes were divided into three major haplogroups A, B and C, and their relationships were well correlated to their distributional patterns. Haplogroup A which is widely distribute in the southern part of Korea is separated in the geographical distribution from the haplogroup B which is found from China to the western part of Korea. Haplogroup C is only found in Japan.

Occurrence of a Natural Hybrid between Acheilognathus signifer and A. lanceolatus (Pisces: Cyprinidae) (묵납자루 Acheilognathus signifer와 납자루 A. lanceolatus 사이의 자연 잡종 출현)

  • Kim, Hyeong Su;Yun, Seung Woon;Kim, Hyun Tae;Park, Jong Young
    • Korean Journal of Ichthyology
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    • v.27 no.3
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    • pp.199-204
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    • 2015
  • A natural hybrid between Acheilognathus signifer and A. lanceolatus was collected in their sympatric area, the Gimhwanamdaecheon of Hangang (River), Korea. Morphological characters, mitochondrial cytochrome b gene (cyt b), and recombination-activating gene 1 (RAG-1) were investigated to confirm the natural hybrid origin. As a result of morphological characters, the natural hybrid was appeared to have intermediate characters between two parental species in three characters; the band of dorsal fin, the color patterns of anal fin membrane, and the body color. In analysis of cyt b, it was revealed that the maternal species of the natural hybrid was appeared to be A. signifer due to their 99.9% sequence identity. Also, in analysis of RAG-1, an electropherogram of the hybrid individual displayed double peaks, strongly indicating its hybrid state.