• Journal of Microbiology and Biotechnology
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• 제20권9호
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• pp.1295-1299
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• 2010

Recently, recombinant Streptomyces venezuelae has been established as a heterologous host for microbial production of flavanones and stilbenes, a class of plant-specific polyketides. In the present work, we expanded the applicability of the S. venezuelae system to the production of more diverse plant polyketides including flavones and flavonols. A plasmid with the synthetic codon-optimized flavone synthase I gene from Petroselium crispum was introduced to S. venezuelae DHS2001 bearing a deletion of the native pikromycin polyketide synthase gene, and the resulting strain generated flavones from exogenously fed flavanones. In addition, a recombinant S. venezuelae mutant expressing a codon-optimized flavanone $3{\beta}$-hydroxylase gene from Citrus siensis and a flavonol synthase gene from Citrus unshius also successfully produced flavonols.

• 한국가금학회지
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• 제20권1호
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• pp.1-9
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• 1993

본 연구는 반성 은색유전자(S：silver gene)를 도입하여 성 감별용 산난종계 계통으로 육성하여 이를 모계통으로 이용함으로서 깃털에 의한 자웅감별이 가능할 뿐만 아니라 잡종강세(heterosis)를 이용한 우수실용계 (commercial chicken)를 작출하고자 수행되었다. 시험은 암수감별용 계통으로 조성된 계통을 이용하여 1차년도에는 생산능력이 우수한 계통으로 육종하기 위해 폐쇄군 육종방법 (colosed flock breeding)을 사용하였고, 2차년도에서는 새로 조성된 계통을 활용하여 실용계 작출을 위한 우량 교배조합 선발을 실시하였다. 합성종 계통의 상업용 실용계로서의 산난능력 검정을 위한 교잡시험에서 B$\times$A, B$\times$C 교잡구와 외국도계 2계통, 그리고 국산계 2계통을 대조구로 삼아 56주령까지의 일반능력을 비교한 결과 생존율, 체중 등에 있어서는 교잡구와 대조구간에 차이를 발견하기 못하였다. 산란능력에 있어 초산체령은 170일 전후로 Manina White의 153일을 제외하고는 약 10여일 지연되었으나, 시험구간에 차이는 없었다. 산난지수는 B$\times$A, B$\times$C 교잡구가 각각 186.3, 191.3으로 외국도입계인 ISA 계통보다는 낮았지만 다른 대조구보다는 양호하였다. 산난율의 경우 교잡구가 각각 75.7%, 76.8%로서 ISA계통을 제외한 다른 대조구에 비해 높았고 난중에 있어서는 B$\times$C 교잡구가 64.5g으로 가장 높게 나타났다. 한편, 초생추들은 깃털색에 의해 완전하게 자웅감별이 가능함에 따라(99%) 이미 조성된 합성종의 유전적 조성이 고정되었음을 알 수 있었다. 이상으로 교잡시험의 결과를 살펴볼 때 B$\times$A, B$\times$C 교잡구의 산난능력은 다른 외국 도입계와 국산계에 비해 결코 떨어지지 않는다고 결론지을 수 있다. 결과적으로 본 시험을 통하여 암수감별용 계통으로 조성된 합성종의 능력은 우수하였으며 앞으로 산난계 개량에 매우 유용하게 이용될 것으로 생각된다.

• International journal of advanced smart convergence
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• 제7권2호
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• pp.101-111
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• 2018

Celiac disease (CD) is an immune-mediated enteropathy of small intestine diagnosed in both childhood and adulthood. CD is caused by gluten, which produces gliadorphin during its digestion. The enzyme dipeptidyl peptidase-4 (DPP4) breaks gliadorphin down nevertheless the last tripeptide remains and eventually inhibits DPP4, thus slowing down its process. Therefore, the idea is to produce an additional DPP4 enzyme which is crucial. Consequently, the functional DPP4 gene was cloned into pCDNA3 intermediate (FLAG+DPP4) vector and finally a recombinant plasmid pSB1C3 (Andersons promoters+FLAG+DPP4) was constructed using synthetic biology. Normally, a DPP4 inhibitor is used as a cure for diabetes. Another important concern was overexpression of DPP4, which might lead to diabetes, accordingly the work was also performed for the regulation of the DPP4 gene expression. In this regard, three types of Anderson promoters (strong, moderate and weak) were utilized to study the control overexpression. This is the first report of idealistic trial for control the exogenous DPP4 gene-expression by molecular biologic tools.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2003년도 추계국제학술대회
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• pp.174-174
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• 2003

There are many synthetic chemicals, such as di(2-ethylhexyl) phthalate (DEHP) and dibutyl phthalate (DBP), used in chemical reaction processes in industry. The establishment of toxicity and detection of synthetic chemicals that may pose a genetic hazard in our enviornment is subjects of great concern at present DEHP, a ubiquitous phthalate plasticizer, induces a wide range of developmental and reproductive toxicities in mammals. DEHP belongs to the large diverse class of peroxisome proliferator compounds, which include herbicides, hypolipidemic drugs. DBP is a plasticizer used to products containing nitrocellulose, polyvinyl acetate, and polyvinyl chloride such as food wraps and blood bags. DBP is also used in cosmetics as a solvent and fixative for perfumes, a suspension agent for solids, an antifoamer, a skin emollient, and hair spray The present study was performed to examine patterns of gene expression in MCF-7 cells following DEHP and DBP exposure. Changes in gene expression were determined by microarray analysis using KISTCHIP-400 including 401 endocrine related genes based on public database and research papers. Of the genes analysis, we determined that genes detected by array showed a 2-fold or greater change in their expression level(increase or decrease). The results of this study demonstrate that a number of genes were differentially expressed in MCF-7 cells but these changes were not significant. Therefore, we keep going this study using microarray analysis and future studies will examine changes of gene expression on time-course and does treatment in variable cell lines.

• Journal of Applied Biological Chemistry
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• 제65권1호
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• pp.63-74
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• 2022

Microbial dysbiosis in the gut is associated with human diseases, and variations in mucus alter gut microbiota. Therefore, we explored the effects of mucin on the gut microbiota using a community of 19 synthetic gut microbial species. Cultivation of these species in modified Gifu anaerobic medium (GAM) supplemented with mucin before synthetic community assembly facilitated substantial growth of the Bacteroides, Akkermansia, and Clostridium genera. The results of 16S rRNA microbial relative abundance profiling revealed more of the beneficial microbes Collinsella, Bifidobacterium, Ruminococcus, and Lactobacillus. This increased acetate levels in the community cultivated with, rather than without (control), mucin. We identified differences in predicted cell function and metabolism between microbes cultivated in GAM with and without mucin. Mucin not only changed the composition of the gut microbial community, but also modulated metabolic functions, indicating that it could help to modulate microbial changes associated with human diseases.

• 대한약학회:학술대회논문집
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• 대한약학회 2001년도 Proceedings of International Convention of the Pharmaceutical Society of Korea
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• pp.134.2-135
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• 2001

• Bulletin of the Korean Chemical Society
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• 제7권4호
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• pp.325-327
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• 1986

• 한국작물학회:학술대회논문집
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• 한국작물학회 2020년도 추계학술대회
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• pp.147-147
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• 2020

• 대한의생명과학회지
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• 제10권2호
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• pp.137-142
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• 2004

The peroxisome proliferator-activated receptor $\gamma$ (PPAR${\gamma}$) is the molecular target for a class of drugs, the antidiabetic thiazolidnediones (TZDs). The heterodimer of PPAR${\gamma}$ with retinoid X receptor (RXR) plays a central role in the regulation of adipogenesis and insulin sensitization. We synthesized two chemicals, DANA87 and DANA88, sharing structural characteristics with TZDs. Given this structural similarity, it was hypothesized that DANA87 and DANA88 may act as PPAR$\gamma$ ligands. In transient transfection assays, DANA87 and DANA88 caused slight increases in the endogenous expression of a luciferase reporter gene containing the PPAR responsive element in 3T3-L1 preadipocytes. However, DANA87 and DANA88 significantly inhibited troglitazone-induced reporter gene activation when cells were treated with a combination of DANA87 or DANA 88 and troglitazone, one of the TZDs that activate PPAR$\gamma$. These results suggest that DANA87 and DANA88 are not only weak agonists of PPAR${\gamma}$ transactivation, but also competitively antagonize troglitazone-induced PPAR$\gamma$ reporter activity.

• Mycobiology
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• 제48권2호
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• pp.104-114
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• 2020

The carbohydrate-active enzyme (CAZyme) genes of Trametes contribute to polysaccharide degradation. However, the comprehensive analysis of the composition of CAZymes and the biosynthetic gene clusters (BGCs) of Trametes remain unclear. Here, we conducted comparative analysis, detected the CAZyme genes, and predicted the BGCs for nine Trametes strains. Among the 82,053 homologous clusters obtained for Trametes, we identified 8518 core genes, 60,441 accessory genes, and 13,094 specific genes. A large proportion of CAZyme genes were cataloged into glycoside hydrolases, glycosyltransferases, and carbohydrate esterases. The predicted BGCs of Trametes were divided into six strategies, and the nine Trametes strains harbored 47.78 BGCs on average. Our study revealed that Trametes exhibits an open pan-genome structure. These findings provide insights into the genetic diversity and explored the synthetic biology of secondary metabolite production for Trametes.