• Title/Summary/Keyword: DNA Polymorphism

검색결과 1,097건 처리시간 0.026초

PCR 다형성 분석에 의한 비늘버섯 속 계통의 유연관계 분석 (Phylogenetic relationships in different strains of Pholiota species based on PCR polymorphism)

  • 권운혁;박혁;백민재;조우진;최우정;안치범;신도빈;이태수
    • 한국버섯학회지
    • /
    • 제11권2호
    • /
    • pp.69-76
    • /
    • 2013

  • 우리나라와 전 세계의 여러 지역에서 수집한 비늘버섯속 18 균주와 개암비늘버섯 2 균주를 대상으로 rDNA의 ITS region 염기서열과 genomic DNA의 RAPD-PCR을 수행하였다. ITS1과 ITS2영역의 염기의 수는 각각 233~271, 158~233 그리고 174~219 염기쌍으로 종에 따라 변이가 있었는데 ITS2영역의 염기서열이 ITS1의 영역보다 변이가 높았고 5.8S지역의염기의수는 비교적 변이가 적었다. 각각의 균주 간 유연관계를 알아보기 위해 ITS영역의 염기서열을 이용하여 계통도를 작성한 결과 실험에 사용한 균주는 8개의 클러스터로 나누어지는 것으로 나타났으며 동일한 종의 버섯은 동일한 클러스터에 속하는 것으로 나타났다. 또한 20종류의 primer를 이용하여 비늘버섯속 버섯을 대상으로 RAPD-PCR을 수행한 결과 15개의 primer가 효과적으로 염색체 DNA를 증폭하는 것으로 나타났다. 증폭의 양상은 primer의 종류와 종에 따라 변이가 있었다. 이 결과를 토대로 계통수를 작성한 결과 계통수는 ITS 영역의 PCR 결과와 매우 유사하였다. 본 실험결과, 실험에 사용한 비늘버섯속 버섯의 종과 계통 간의 유연관계는 높았으며, rDNA ITS 영역의 염기서열분석 결과를 이용해 공시된 각각의 비늘버섯 종을 분류하는데 유용하게 사용이 가능하였다.

  • https://doi.org/10.14480/JM.2013.11.2.069 인용 PDF

The GSTP1 Ile105Val Polymorphism is not Associated with Susceptibility to Colorectal Cancer

  • Khabaz, Mohamad Nidal
    • Asian Pacific Journal of Cancer Prevention
    • /
    • 제13권6호
    • /
    • pp.2949-2953
    • /
    • 2012

  • The glutathione S transferase (GST) family is a major part of cellular defense mechanisms against endogenous and exogenous substances, many of which have carcinogenic potential. Alteration in the expression level or structure of the glutathione-S-transferase (GST) enzymes may lead to inadequate detoxification of potential carcinogens and consequently contribute to cancer development. A member of the glutathione-S-transferase (GST) family, GSTP1, is an attractive candidate for involvement in susceptibility to carcinogen-associated colorectal cancer. An $Ag{\rightarrow}G$ transition in exon 5 resulting in an Ile105Val amino acid substitution has been identified which alters catalytic efficiency. The present study investigated the possible impact of Ile105Val GSTP1 polymorphism on susceptibility to colorectal cancer. in Jordan We examined 90 tissue samples previously diagnosed with colorectal carcinoma, and 56 non-cancerous colon tissues. DNA was extracted from paraffin embedded tissues and the status of the GSTP1 polymorphism was determined using a polymerase chain reaction restriction fragment length polymorphism (RFLP) method. No statistically significant differences were found between colorectal cancer cases and controls for the GSTP1 Ile/Ile, Ile/Val and Val/Val genotypes. The glutathione S-transferase polymorphism was not associated with risk in colorectal cancer cases in Jordan stratified by age, sex, site, grade or tumor stage. In conclusion, the GSTP1 Ile105Val polymorphism is unlikely to affect the risk of colorectal cancer.

  • https://doi.org/10.7314/APJCP.2012.13.6.2949 인용 PDF KSCI

Variation in the number of nucleoli and incomplete homogenization of 18S ribosomal DNA sequences in leaf cells of the cultivated Oriental ginseng (Panax ginseng Meyer)

  • Chelomina, Galina N.;Rozhkovan, Konstantin V.;Voronova, Anastasia N.;Burundukova, Olga L.;Muzarok, Tamara I.;Zhuravlev, Yuri N.
    • Journal of Ginseng Research
    • /
    • 제40권2호
    • /
    • pp.176-184
    • /
    • 2016

  • Background: Wild ginseng, Panax ginseng Meyer, is an endangered species of medicinal plants. In the present study, we analyzed variations within the ribosomal DNA (rDNA) cluster to gain insight into the genetic diversity of the Oriental ginseng, P. ginseng, at artificial plant cultivation. Methods: The roots of wild P. ginseng plants were sampled from a nonprotected natural population of the Russian Far East. The slides were prepared from leaf tissues using the squash technique for cytogenetic analysis. The 18S rDNA sequences were cloned and sequenced. The distribution of nucleotide diversity, recombination events, and interspecific phylogenies for the total 18S rDNA sequence data set was also examined. Results: In mesophyll cells, mononucleolar nuclei were estimated to be dominant (75.7%), while the remaining nuclei contained two to four nucleoli. Among the analyzed 18S rDNA clones, 20% were identical to the 18S rDNA sequence of P. ginseng from Japan, and other clones differed in one to six substitutions. The nucleotide polymorphism was more expressed at the positions 440-640 bp, and distributed in variable regions, expansion segments, and conservative elements of core structure. The phylogenetic analysis confirmed conspecificity of ginseng plants cultivated in different regions, with two fixed mutations between P. ginseng and other species. Conclusion: This study identified the evidences of the intragenomic nucleotide polymorphism in the 18S rDNA sequences of P. ginseng. These data suggest that, in cultivated plants, the observed genome instability may influence the synthesis of biologically active compounds, which are widely used in traditional medicine.

  • https://doi.org/10.1016/j.jgr.2015.07.005 인용 PDF KSCI