• 제목/요약/키워드: Ry gene

검색결과 10건 처리시간 0.026초

D. melanogaster에 있어서 P Element를 이용한 rosy 유전자의 형질전환 (P Element-Mediated Transformation with the rosy Gene in Drosophila melanogaster)

  • 김욱
    • 한국동물학회지
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    • 제38권3호
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    • pp.340-347
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    • 1995
  • D. melanogaster를 대상으로 두 종류의 P element construct, 즉 Pc[(ry+)B]와 p[(ry+)$\Delta$SX9]을 사용한 형질전환 실험을 통하여 자율적 및 비자율적인 P element construct간의 vector로써의 효율성을 분석했다. 자율적인 P element 내에 rosy 유전자를 포함하고 있는 Pc[(ry+)B] construct를 진정 M 계통형인 ry506 돌연변이 계통에 주입시켰다. 또한 비자율적인 P element 내에 rosy 유전자를 포함하고 있는 p[(ry+)$\Delta$SX9] construct와 전이효소의 공급원으로써 p-$\Delta$2-3hs$\pi$ helper plasmid를 역시 같은 계통의 ry506 돌연변이 계통에 주입시켰다. Dechorination 방법에 의해 총 1143 embryo를 대상으로 microinjection 한 결과, 모두 35 계통의 형질전환된 정상형의 눈을 가진 계통을 얻었다. P element construct를 주입시킨 전체 1143 embryo 중에서 약 20% 정도가 성체로 부화되었으며, 부화된 개체 가운데 약 40% 정도가 눈 색깔이 거의 정상형과 같은 G0 transformant 로 나타났다. 그러나 생식력을 가진 G0 transformant의 약 40% 만이 G1 transformant로 나타남으로써 모두 35 계통의 transformant를 얻었다. 따라서 G0 단계에서 나타난 형질전환 현상에는 반드시 rosy transformant의 염색체 삽입에 의해서 만이 아니라 세포질내에서도 construct내의 rosy 유전자의 발현이 가능한 것으로 분석되었다. 또한 형질전환율에 있어서는 Pc[(ry+)B]와p[(ry+)$\Delta$SX9] construct 간에 유의한 차가 없는 것으로 나타났다. 이상의 결과로 볼 때, 실험 목적에 따라 자율적인 P element 또는 helper DNA를 이용한 비자율적인 P element를 효과적인 vector 로 선택 이용함으로써 특정 유전자를 곤충집단내로 침투 및 고정시킬 수 있다고 판단된다.

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Molecular Screening and Characterization of Antiviral Potatoes

  • Tripathi, Giriraj;Li, Hongxain;Park, Jae-Kyun;Park, Yoon-Kyung;Cheong, Hyeon-Sook
    • Biotechnology and Bioprocess Engineering:BBE
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    • 제11권2호
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    • pp.89-95
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    • 2006
  • Potato plants carrying the Ry gene are extremely resistance to a number of potyviruses, but it is not known which variety expressed the resistance. In this investigation, combined classical and molecular techniques were used to identify virus resistance potatoes. Mechanical inoculation of 32 varieties of Korean potato cultivars, with potato virus Y (PVY), induced various symptoms, such as mosaic, yellowing, necrosis, mottle, vein clearing and vein bending. Different virus spreading patterns were observed, such as highly sensitive, moderate and resistant to $PVY^o$ inoculated leaves in different cultivars. From the results of double antibody sandwich-enzyme links immunosorbant assays (DAS-ELISA), coupled with reverse transcription polymerase chain reaction (RT-PCR), Winter valley and Golden valley were found to be highly susceptible and resistant cultivars to $PVY^o$ respectively. TEM was used as a complementary method to conform the localization of the virus in leaf tissues. TEM detect virus particles in Golden valley, where, ELISA and RT-PCR were unable to detect the CP gene. However, the interior part of the tissues was severely deformed in $PVY^o$ infected Winter valley, than Golden valley The Ry gene is involved in an induced response in $PVY^o$ infected Golden valley plants. The methods described in this study could be applied for the screening and development of antiviral potatoes.

Progress in Transgenic Cloned Pig for Xenotransplantation

  • Park, Kwang-Wook
    • 한국수정란이식학회:학술대회논문집
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    • 한국수정란이식학회 2003년도 제3회 발생공학 국제심포지움 및 학술대회
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    • pp.9-19
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    • 2003
  • Pig organ is thought to be the most suitable nonhuman organ for xenotransplanstation. However, one of the major constraints to using pig organs for xenotransplantation is human natural antibody-mediated hyperacute rejection (HAR). Elimination of a(1,3) galactosyltransferase (GGTA1) from the pig is expected to be a solution to the problem of hyperacute rejection. ry1any efforts have made characterization of GGTA1 in structure and function. improvement in the technique of DNA transfection of somatic cells and advancement of the pig NT, a specific modification has been made to one copy of the GGTA1 gene by Missouri group in 2002. To date because homozygousity of the genetic modification has been achieved in this gene, the role of gala(1,3) gal specific natural antibody in HAR and the efficacy of xenotransplantation in a nonhuman primate model will be addressed. If other genes are found to be involved in rejection of pig donors by primates, the technology will be available to modify those genes so that rejection can be overcome.

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대두 원형질체와 형질전환된 담배에서의 대두 glycinin 유전자 Gy2 promoter의 발현조절 기작 (Analysis of the Glycinin Gy2 Promoter Activity in Soybean Protoplasts and Transgenic Tobacco Plants)

  • 김수정;이지영;김정호;최양도
    • Applied Biological Chemistry
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    • 제38권5호
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    • pp.387-392
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    • 1995
  • 대두 glycinin 유전자의 조직 특이적이고 분화 발달 특이적인 발현 조절 메카니즘을 연구하기 위하여 Gy2 유전자의 5' upstream 부위 염기서열을 조사한 결과, glycinin 유전자의 발현을 조절하는 인자로 여겨지는 여러 가지 조절 인자들을 발견하였다. 진핵세포 유전자에 공통적으로 존재하는 TATA box와 AGGA box가 존재하고, 종자 저장 단백질에서 공통적으로 발견되는 embryo factor binding sequence, RY repeat CACA sequence, ${\beta}$-conglycinin enhancer 와 유사한 sequence 등이 발견되었다. 이러한 조절 요소들이 Gy2 유전자의 발현 조절에 미치는 영향을 알아보기 위해 Gy2유전자의 5' upstream부위를 Exo III nuclease와 여러가지 제한효소를 이용하여 일련의 deletion mutants를 제조한 후 GUS 유전자와 결합시켰다. 이들 여러가지 chimeric constructs를 대두 원형질체에 전입하고 원형질체로부터 추출물을 분리하여 GUS 활성을 조사한 결과, $-28l{\sim}-223$ 혹은 $-l70{\sim}-122$ 부위를 포함하였을 경우 활성이 감소하였고, $-223{\sim}-170$ 혹은 $-l22{\sim}-16$ 부위를 포함하였을 경우 활성이 높게 나타났다. 이러한 Gy2 유전자의 이중적인 발현 양상은 glycinin 유전자의 발현조절에 음성 조절 요소와 양성 조절 요소가 관여하고있다는 사실을 제시해 주고 있다. 또한 이들 여러가지 chimeric constructs로 형질 전환된 담배의 종자와 잎에서 GUS활성을 조사한 결과, CaMV promoter를 포함하는 chimeric construct는 종자와 잎에서 모두 활성을 나타냈으나, Gy2 Promoter를 포함하는 chimeric constructs는 종자에서만 GUS 활성을 나타내고 잎에서는 활성이 나타나지 않는 조직 특이적인 발현 양상을 나타내었다.

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Calumenin Interacts with SERCA2 in Rat Cardiac Sarcoplasmic Reticulum

  • Sahoo, Sanjaya Kumar;Kim, Do Han
    • Molecules and Cells
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    • 제26권3호
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    • pp.265-269
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    • 2008
  • Calumenin, a multiple EF-hand $Ca^{2+}$ binding protein is located in the SR of mammalian heart, but the functional role of the protein in the heart is unknown. In the present study, an adenovirus gene transfer system was employed for neonatal rat heart to examine the effects of calumenin over-expression (Calu-OE) on $Ca^{2+}$ transients. Calu-OE (8 folds) did not alter the expression levels of DHPR, RyR2, NCX, SERCA2, CSQ and PLN. However, Calu-OE affected several parameters of $Ca^{2+}$ transients. Among them, prolongation of time to 50% baseline ($T_{50}$) was the most outstanding change in electrically-evoked $Ca^{2+}$ transients. The higher $T_{50}$ was due to an inhibition of SERCA2-mediated $Ca^{2+}$ uptake into SR, as tested by oxalate-supported $Ca^{2+}$ uptake. Furthermore, co-IP study showed a direct interaction between calumenin and SERCA2. Taken together, calumenin in the cardiac SR may play an important role in the regulation of $Ca^{2+}$ uptake during the EC coupling process.

Cardiac hypertrophy and abnormal $Ca^{2+}$ handling in transgenic mice overexpressing jnnctate

  • Hong, Chang-Soo;Cho, Myeong-Chan;Kwak, Yong-Geun;Chane, Soo-Wan;Kim, Do-Han
    • 한국생물물리학회:학술대회논문집
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    • 한국생물물리학회 2003년도 정기총회 및 학술발표회
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    • pp.52-52
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    • 2003
  • Junctate is a newly identified integral ER/SR membrane $Ca^{2+}$ binding protein, which is an alternative splicing form of the same gene generating aspartyl $\square$-hydroxylase and junctin. To elucidate the functional role of junctate in heart, transgenic (TG) mice overexpressing mouse cardiac junctate-1 under the control of mouse $\square$$^{~}$ myosin heavy chain promoter were generated. Overexpression of junctate in mouse heart resulted in cardiac hypertrophy, increased fibrosis, bradycardia, arrhythmias and impaired contractility. Overexpression of junctate also led to down-regulation of SERCA2, calsequestrin, calreticulin and RyR, but to up-regulation of NCX and PMCA. The SR $Ca^{2+}$ content decreased and the L-type $Ca^{2+}$ current density and the action potential durations increased in TG cardiomyocytes, which could be the cause for the bradycardia in TG heart. The present work has provided an important example of pathogenesis leading to cardiac hypertrophy and arrhythmia, which was caused by impaired $Ca^{2+}$ handling by overexpression of junctate in heart.n heart.

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Fine localization of a new cataract locus, Kec, on mouse chromosome 14 and exclusion of candidate genes as the gene that causes cataract in the Kec mouse

  • Kang, Min-Ji;Cho, Jae-Woo;Kim, Jeong-Ki;Kim, Eun-Min;Kim, Jae-Young;Cho, Kyu-Hyuk;Song, Chang-Woo;KimYoon, Sun-Joo
    • BMB Reports
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    • 제41권9호
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    • pp.651-656
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    • 2008
  • A mouse with cataract, Kec, was generated from N-ethyl-N-nitrosourea (ENU) mutagenesis. Cataract in the Kec mouse was observable at about 5 weeks after birth and this gradually progressed to become completely opaque by 12 weeks. Dissection microscopy revealed that vacuoles with a radial or irregular shape were located primarily in the cortex of the posterior and equatorial regions of the lens. At the late stage, the lens structure was distorted, but not ruptured. This cataract phenotype was inherited in an autosomal recessive manner. We performed a genetic linkage analysis using 133 mutant and 67 normal mice produced by mating Kec mutant (BALB/c) and F1 (C57BL/6 $\times$ Kec) mice. The Kec locus was mapped to the 3 cM region encompassed by D14Mit34 and D14Mit69. In addition we excluded coding sequences of 9 genes including Rcbtb2, P2ry5, Itm2b, Med4, Nudt15, Esd, Lcp1, Slc25a30, and 2810032E02Rik as the candidate gene that causes cataract in the Kec mouse.

Drosophila single P[en-lacZ] element mutagenesis를 이용한 발생 관련 돌연변이체 작성 (Screening and Characterization of Drosophila Development Mutants Using Single P[en-lacZ] Element Mutagenesis)

  • 하혜영;이희정;박순희;유미애;이원호
    • 생명과학회지
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    • 제7권1호
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    • pp.49-58
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    • 1997
  • Engralied 5.7kb upstream sequence와 E. colilacZ의 융합 유전자를 가진 P[en-lacZ] 인자를 jumpstart 기법을 이용하여, ryXho25 strain의 초파리 48A 염색체 위치로부터 새로운 위치로 삽입하였다. 총 3315의 유전적 교배를 통해서, P[en-lacZ] 가 다른 염색체 상으로 삽인된 113 계통을 얻었다. X-gal 염색으로 이들 113 계통의 3령기 유충 조직에서의 $\beta$-galactosidase 발현을 조사하였다. 도한 113 계통 중 7계통이 열성치사돌연변이인 것으로 동정되었다. 이들 7 계통 중 초기 배발생 과정에서 치사하는 것으로 조사된 #1119의 초기 배발생 과정에서의 ${\beta}$-galactosidase 발현과 핵의 이동 및 세포화 양상을 조사하였다. 본 연구에서 얻어진 P[en-lacZ] 삽입 돌연변이체들은 앞으로 Drosophila 발생에 관련된 유전자들의 구조와 기능을 연구하는데 활용될 수 있을 것이다.

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Vitamin D Dependent Rickets Type 1A Caused by CYP27B1 Mutation

  • Bak, Na Ry;Song, Eun Song;Yang, Eun Mi;Kim, Chan Jong
    • Childhood Kidney Diseases
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    • 제23권2호
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    • pp.111-115
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    • 2019
  • Vitamin D dependent rickets type 1A (VDDR1A) is an autosomal recessive disorder caused by mutations in CYP27B1. Clinical findings are growth retardation, hypotonia, muscle weakness, hypocalcemic seizures, and radiological features of rickets. We aimed to present the VDDR1A case with a genetic study of CYP27B1. The 14-month-old boy was admitted to the hospital due to a seizure. Serum calcium, phosphorus, alkaline phosphatase, parathyroid hormone (PTH), 25(OH) vitamin D, and 1,25(OH)2 vitamin D values were 5.1 mg/dL, 3.7 mg/dL, 705 IU/L, 429 pg/mL, 24.9 ng/mL, and 8.8 pg/mL, respectively. Radiological study showed cupping and fraying of the distal ulna and radius. The molecular genetic study revealed that the patient had a compound heterozygous mutation, $Phe443Profs^*24$ and c.589+1G>A, in CYP27B1. Genetic analysis of the family members presented that the mother was heterozygous for the mutation c.589+1G>A, and that the father was heterozygous for $Phe443Profs^*24$. The patient was treated with calcium lactate and calcitriol. Until now, six Korean patients with VDDR1A have been studied. Including this case, Korean patients with VDDR1A were found to have only three different mutations in 14 alleles, indicating that the mutation in the CYP27B1 gene is homogeneous in the Korean population.

분유에 오염된 Cronobacter sakazakii 검출을 위한 중합효소연쇄반응, 실시간중합효소연쇄반응, 등온검출법의 비교 (Comparison of Polymerase Chain Reaction, Real-time Polymerase Chain Reaction, and Loop-Mediated Isothermal Amplification for the Detection of Cronobacter sakazakii in Milk Powder)

  • 김영주;서승우;왕효우;서동주;이민화;손나리;이복희;최창순
    • 한국축산식품학회지
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    • 제33권5호
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    • pp.610-616
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    • 2013
  • 본 연구에서는 영유아에게 치명적인 감염을 일으키는 C. sakazakii에 대하여 LAMP 검출법을 개발하였다. LAMP법에 의한 C. sakazakii의 검출율은 100%였으며 13개의 음성 지표군에 대해서는 모두 음성 반응을 보여 특이도가 매우 높은 것으로 판단되었다. 또한, HhaI과 NruI 두 개의 제한 효소를 LAMP product에 반응시킨 결과, 유전자의 특정 염기서열이 절단되는 것을 확인하였으며, 이를 통해 LAMP 검출법에 의해 증폭된 DNA가 C. sakazakii-specific ompA임을 확인하였다. 조제분유에 오염 된 C. sakazakii를 LAMP법으로 검출 시 검출한계는 $10^0$ CFU/mL이었으며 이는 기존의 PCR법이나 real-time PCR법에 비해 100-10,000배 높은 수준으로 민감도가 매우 높은 것으로 판단되었다. 이와 같이 높은 특이도와 민감도를 가진 LAMP 검출법은 C. sakazakii와 같은 급성 기회 감염균이나 병원성 미생물에 의한 식중독 발생시 현장에서 병원체를 간편하고 신속하게 검출할 수 있는 기술로 기대된다.