• 제목/요약/키워드: infectious cDNA

검색결과 101건 처리시간 0.023초

한국에서 분리된 전염성 조혈괴저바이러스의 N 단백질의 유전자 클로닝과 염기서열 분석 (Molecular Cloning and Nucleotide Sequence of the N Protein of a Korean Isolate of Infectious Hematopoietic Necrosis Virus)

  • 문창훈;김현주;박정민;조화자;차승주;윤원준;박정재;이은희;강호성;김한도;박정우
    • 미생물학회지
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    • 제34권1_2호
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    • pp.69-73
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    • 1998
  • 한국에서 분리된 전염성 조혈괴저바이러스(infectious hematopoietic necrosis virus, IHNV)인 IHNV-PRT의 nucleocapsid(N)를 암호화하고 있는 cDNA를 클로닝하여 분석하였다. N 유전자는 391개의 아미노산으로 구성된 42.3 kDa의 분자량을 가진 단백질을 암호화하는 1,176 bp 크기의 open reading frame을 가지고 있었다. N 단백질의 아미노산 서열을 다른 외국에서 분리한 IHNV들의 N과 비교한 결과 75-90% 정도의 유사성을 보였으나 다른 종의 fish rhabdovirus인 hirame rhabdovirus(HRV) 및 viral hemorrhagic septicemia virus(VHSV)와는 각각 43%와 38%의 유사성을 보였다. 그러나 아미노산 서열 214-265의 52개의 아미노산들은 모든 종의 fish rhabdovirus간에 매우 높은 유사성을 보여 주었다.

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Sparganosis Presenting as Cauda Equina Syndrome with Molecular Identification of the Parasite in Tissue Sections

  • Boonyasiri, Adhiratha;Cheunsuchon, Pornsuk;Srirabheebhat, Prajak;Yamasaki, Hiroshi;Maleewong, Wanchai;Intapan, Pewpan M.
    • Parasites, Hosts and Diseases
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    • 제51권6호
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    • pp.739-742
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    • 2013
  • A 52-year-old woman presented with lower back pain, progressive symmetrical paraparesis with sensory impairment, and sphincter disturbance. Magnetic resonance imaging (MRI) of the whole spine revealed multiple intradural extramedullary serpiginous-mass lesions in the subarachnoid space continuously from the prepontine to the anterior part of the medulla oblongata levels, C7, T2-T8, and T12 vertebral levels distally until the end of the theca sac and filling-in the right S1 neural foramen. Sparganosis was diagnosed by demonstration of the sparganum in histopathological sections of surgically resected tissues and also by the presence of serum IgG antibodies by ELISA. DNA was extracted from unstained tissue sections, and a partial fragment of mitochondrial cytochrome c oxidase subunit 1 (cox1) gene was amplified using a primer set specific for Spirometra spp. cox1. After sequencing of the PCR-amplicon and alignment of the nucleotide sequence data, the causative agent was identified as the larva of Spirometra erinaceieuropaei.

전염성 췌장괴저바이러스 DRT Strain VP1유전자의 Baculovirus Hyphantria cunea Nuclear Polyhedrosis Virus에 재조합과 발현 (Recombination and Expression of VP1 Gene of Infectious Pancreatic Necrosis Virus DRT Strain in a Baculovirus, Hyphantria cunea Nuclear Polyhedrosis Virus)

  • 이형환;장재혁;차성철;정혜경
    • 대한바이러스학회지
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    • 제27권2호
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    • pp.239-255
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    • 1997
  • 전염성 췌장괴저바이러스 (Infectious pancreatic necrosis virus) DRT 주의 VP1유전자를 대 장균 발현운반체와 Baculovirus에 삽입하여 대장균과 진핵세로에서 VP1단백질의 발현을 연구하였다. 재조합체 pMal-pol 클론 [7]에서 2.7 Kb 단편인 VP1 유전자를 제한효소 XbaI으로 절단하여 Baculovirus 운반체인 pBacPAK9에 클로닝하여 pBacVP1이라 명명하였다. 이 pBacVP1에 클로닝된 VP1유전자를 제한효소 SacI과 PstI으로 절단하여 대장균 발현 운반체인 pQE-30에 클로닝하여 pQEVP1이라 명명하였다. 또한 VP1 단백질의 C-말단에 6개의 히스티딘 $6{\times}His$이 붙어 있는 단백질을 만들기 위하여, pQEVP1 클론의 His부위를 EcoRI으로 절단하고, 또한 pBacVP1을 EcoRI으로 절단하여 생긴 부위에His-EcoRI DNA 단편을 교체시켜 재클로닝하여 pBacHis-VP1을 만들었다. pBacHis-VP1 DNA와 Bsu36I로 처리된 LacZ-Hyphantria cunea nuclear polyhedrosis virus (LacZ-HcNPV)를 함께 lipofectin을 이용하여 곤충세포 (Spodoptera frugiperda cell)에 동시 감염을 시켜서 재조합 바이러스를 선발하여, VP1-HcNPV-1이라 명명하였다. pQEVP1 클론은 6개의 히스티딘 단편이 부착된 VP1단백질을 Ni-NTA resin 크로마토그래피법으로 정제하여 SDS-PAGE와 Western blot으로 확인하였고, 단백질의 활성과 구조에 영향을 주지 않는 6개의 히스티딘 단편 ($6\;{\times}\;His$)이 부착된 94 kDa의 VP1단백질을 정제할 수 있었다. 또한 재조합 바이러스에 감염된 곤충세포에서 VP1 단백질이 발현된 것을 전기영동과 Western blot으로 검색을 한 결과 95 kDa VP1 단백질이 발현이 되었음을 확인하였다.

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Biological Characterization and Sequence Analysis of Cucumber mosaic virus isolated from Capsicum annuum

  • Kim, Min-Jea;Choi, Seung-Kook;Yoon, Ju-Yeon;Choi, Jang-Kyung;Ryu, Ki-Hyun
    • The Plant Pathology Journal
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    • 제21권2호
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    • pp.142-148
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    • 2005
  • Whereas most of isolates of Cucumber mosaic virus(CMV) can induce green mosaic systemic symptoms on zucchini squash, foliar symptoms of a pepper isolate of CMV (Pf-CMV)-infected zucchini squash revealed systemic chlorotic spots. To assess this biological property, infectious full-length cDNA clones of Pf-CMV were constructed using long-template RT-PCR. The complete nucleotide sequences of RNA2 and RNA3 of Pf-CMV were determined from the infectious fulllength cDNA clones, respectively. RNA 2 and RNA3 of Pf-CMV contain 3,070 nucleotides and 2,213 nucleotides, respectively. Overall sequence homology of two RNAs revealed high similarity (90%) between CMV strains, and 60% similarity to those of Tomato aspermy virus and Peanut stunt virus strains. By sequence analysis with known representative strains of CMV, Pf- CMV belongs to a typical member of CMV subgroup IA. The virus has high evolutionary relationship with Fny-CMV, but the pathology of Pf-CMV in zucchini squash was quite different from that of Fny-CMV. The pesudorecombinant virus, F1P2P3, induced chlorotic spot leaf symptom and timing of systemic symptom in squash plants, similar to the plants infected by Pf-CMV. No systemic symptoms were observed when Pf-CMVinoculated cotyledons were removed at 5 days postinoculation (dpi) while Fny-CMV showed systemic symptom at 2 dpi. These results suggest that the pepper isolate of CMV possesses unique pathological properties distinguishable to other isolates of CMVs in zucchini squash.

Pathogenicity of a Korean isolate of Pepper mild mottle virus and development of full-length cDNA clone for infectious in vitro transcripts

  • J.Y. Yoon;Park, J.K.;Y.M. Yu;K.H. Ryu
    • 한국식물병리학회:학술대회논문집
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    • 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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    • pp.143.3-144
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    • 2003
  • A Korean isolate of Pepper mild mottle virus (PMMoV-Kr) was isolated from a diseased pepper crop in Chunchon, Korea. The isolate was biologically purified on Nicoticaa tabacum cv. Xanthi-nc by successive single local transfer steps, and propagated on N. tabacum cv. Samsun. PMMoV-Kr could systemically infect on N. glauca, N. benthmiana, N. occidentalis and Lycopersicon esculentum, which is typical of known isolates of PMMoV. PMMoV-Kr belongs to the pathotype P1,2 based on pepper-tobamoviral indicator experiments; Capsicn chinone harboring L3 gene revealed resistant (necrotic local lesion on inoculated leaf, HR) whereas L+, L1 and L2 pepper plants expressed susceptible reactions of mosaic systemic symptoms for the isolate. To confirm the pathology and delineate symptom determinant of the isolate, full-length cDNAs of PMMoV-Kr were amplified by RT-PCR with a primer set corresponding to the 5'- and 3'-ends of PMMoV. The RT-PCR molecules amplified from genome RNA of the isolate was cloned into the pUC18 vector. Full-length cDNA clones constructed under the control of the T7 RNA promoter could be successfully transcribed to produce in vitro transcript RNA. Infectivity of the capped transcripts and its progeny virus was verified by Western blot and RT-PCR analyses.

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Human cytomegalovirus 증식에 미치는 cAMP의 영향 (Effect of cAMP on the Replication of Human Cytomegalovirus)

  • 지용훈;윤주현;이찬희
    • 미생물학회지
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    • 제31권1호
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    • pp.72-78
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    • 1993
  • Human cytomegalovirus (HCMV) 의 immediate early(IE) 유전자의 promoter/enhancer 부위에 cAMP response element가 있다는 것으부터 caMP 가 HCMV 의 증식에 관여할 것이라고 생각할 수 있다. 이러한 가능성을 알아보기 위해 8-bromoadenosine 3', 5'-cyclic monophosphate (BrA) 와 papaverine 같은 세포내 cAMP 농도를 변화시키는 약제를 사용하여 HCMV 의 증식, DNA 합성 및 IE 유전자 발현에 대한 영향을 알아보았다. HCMV 증식과 DNA 합성은 papaverine 에 의해 억제된 반면, BrA 는 HCMV 의 증식에는 큰 영향을 주지 않았고 DNA 합성은 오히려 촉진시키는 것을 알 수 있었다. HCMV IE promoter 에 의해 작동되는 CAT 유전자를 함유한 plasmid pCMVIE/CAT 을 세포내로 transfection 시켰을 때, papaverine 을 처리한 세포에서는 CAT 효소 활성도가 감소한 반면 BrA 를 처리한 세포에서는 증가하였다. HCMV 에 감수성이 없는 HeLa 세포에서는 CAT 활성도가 감소성 세포인 HEL 세포에서보다 높게 나타난 반면, Vero 세포에서는 낮게 나타났다. 이들 비감수성 세포인 HEL 세포에서 보다 높게 나타난 반면 Vero 세포에서는 낮게 나타났다. 이 들 비감수성 세포에서의 CAT 활성도는 BrA 를 처리하여 주었을 때 모두 증가하였다. 이상과 같은 결과로부터 cAMP 는 HCMV 증식과 IE 유전자 발현에 어느 정도 관여한다는 것을 알 수 있다.

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Human lactoferrin efficiently targeted into caprine beta-lactoglobulin locus with transcription activator-like effector nucleases

  • Yuan, Yu-Guo;Song, Shao-Zheng;Zhu, Meng-Ming;He, Zheng-Yi;Lu, Rui;Zhang, Ting;Mi, Fei;Wang, Jin-Yu;Cheng, Yong
    • Asian-Australasian Journal of Animal Sciences
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    • 제30권8호
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    • pp.1175-1182
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    • 2017
  • Objective: To create genetically modified goat as a biopharming source of recombinant human lacotoferrin (hLF) with transcription activator-like effector nucleases. Methods: TALENs and targeting vector were transferred into cultured fibroblasts to insert hLF cDNA in the goat beta-lactoglobulin (BLG) locus with homology-directed repair. The gene targeted efficiency was checked using sequencing and TE7I assay. The bi-allelic gene targeted colonies were isolated and confirmed with polymerase chain reaction, and used as donor cells for somatic cell nuclear transfer (SCNT). Results: The targeted efficiency for BLG gene was approximately 10%. Among 12 Bi-allelic gene targeted colonies, five were used in first round SCNT and 4 recipients (23%) were confirmed pregnant at 30 d. In second round SCNT, 7 (53%), 4 (31%), and 3 (23%) recipients were confirmed to be pregnant by ultrasound on 30 d, 60 d, and 90 d. Conclusion: This finding signifies the combined use of TALENs and SCNT can generate biallelic knock-in fibroblasts that can be cloned in a fetus. Therefore, it might lay the foundation for transgenic hLF goat generation and possible use of their mammary gland as a bioreactor for large-scale production of recombinant hLF.

Bovine Vira1 Diarrhea Virus를 이용한 포유동물세포 발현벡터의 개발 (Generation of a Mammalian Gene Expression Vector Using Bovine Viral Diarrhea Virus)

  • 이영민
    • 미생물학회지
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    • 제38권2호
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    • pp.86-95
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    • 2002
  • 최근 인간을 비롯한 다양한 생명체의 genome project연구결과 밝혀진 유전자들의 염기서열을 토대로, 생명체 구성성분의 실질적 인 역할을 하는 단배질의 기능을 밝히는 proteomics에 관한 연구의 필요성 이 대두되고 있다. 따라서, 이 연구는 post-genomics시대에 다양한 종류의 단백질 기능과 상호작용의 기초연구에 필수적 인 새로운 포유동물세포 유전자 발현벡터를 RNA 바이러스인 소설사성 바이러스(Bovine Viral Diarrhea Virus)의 infectious CDNA molecular clone을 이용하여 개발하였다. 먼저 BVDV의 infectious CDNA molecular clone (pNADLclns-)을 이용하여 puromycin 항생제에 저항성을 나타내는 puromycin acetyltransferase (pac) 유전자를 삽입하여 recombinant full-length infectious CDNA clone을 합성하였다. 합성된 recombinant CDNA clone을 주형으로 T7 RNA polymerase를 사용하여 in vitro transcribed full-length viral RNA를 합성하였다. 합성된 viral RNA의 자가복제 여부는 MDBK세포에 transfection시킨 후, $^{32}P$ 로 metabolically label함으로써 확인하였다. 또한, transfection된 세포에서의 바이러스 단백질 발현여부는 바이러스에 특이적으로 반응하는 anti-NS3 단클론항체를 사용하여 분석하였다. 또한, infectious CDNA clone을 응용하여 새로운 포유동물세포유전자 발현벡터의 개발을 위해서, 먼저 바이러스의 구조단백질이 바이러스의 자가복제에 필수적인 지를 평가하였다. 실험결과, 각각의 구조단백질 유전자를 deletion한 recombinant cDNA clone으로부터 합성된 viral RMA의 자가복제여부는pac유전자의 발현여부로 recombinant cDNA clone으로부터 합성된 recombinant viral RMA를 MDBK 세포에 transfection시킨 후, puromycin으로 selection함으로써 할 수 있었다. Deletion실험결과, 각각의 구조단백질 capsid및 E0, El, E2는 바이러스의 자가복제에 영향을 기치지 않음을 알 수 있었다. 이와 더불어, 바이러스의 모든 구조단백질을 함께deletion하였을 경우에도 자가복제에는 영향을 기치지 않는 것을 합성된 viral replicon을 이용한 실험에서 알 수 있었다. 이렇게 합성된 BVDV의 replicon을 사용하여 포유동물의 발현벡터로써 사용할수 있는 지의 여부를 분석하기 위해서 pac유전자 이외에 luciferase유전자를 사용하여 MDBK및 HeLa, BHK세포에서의 단백질 발현정도를 시간 별로 분석한 결과, BVDV의 replicon을 다양한 종류의 유전자 발현벡터로사용할 수 있음을 알 수 있었다. 그러므로, RNA바이러스의 하나인 BVDV의 viral replicon을 이용하여 다양한 종류의 포유동물 세포에 유전자 발현벡터로써 사용할 수 있음으로 post-genomics시대에 다양한 종류의 단백질 기능연구에 맡은 도움이 되리라 기대한다.

Prevalence of virulence and cytolethal distending toxin (CDT) genes in thermophilic Campylobacter spp. from dogs and humans in Gyeongnam and Busan, Korea

  • Cho, Hyun-Ho;Kim, Sang-Hyun;Min, Wongi;Ku, Bok-Kyung;Kim, Yong-Hwan
    • 대한수의학회지
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    • 제54권1호
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    • pp.39-48
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    • 2014
  • The prevalence of thermophilic Campylobacter (C.) spp. in stray, breeding, and household dogs was 25.2, 12.0, and 8.8%, respectively. C. jejuni and C. upsaliensis were the predominant Campylobacter spp. from household dogs. cdtA, cdtB, and cdtC were detected by PCR in all isolates. Despite the high cytolethal distending toxin (CDT) gene prevalence, only 26 (31%) C. jejuni strains and one (15.3%) C. coli strain showed evidence of CDT production in HEp-2 cell cytotoxicity assays. Virulence-associated genes detected in the C. jejuni and C. coli isolates were cadF, dnaJ, flaA, racR, ciaB, iamA, pldA, virB11, ceuE, and docC. cadF, dnaJ, flaA, and ceuE were found in all C. jejuni and C. coli isolates. When detecting Guillain-Barr$\acute{e}$ syndrome-associated genes (galE, cgtB, and wlaN), galE was identified in all isolates. However, cgtB and wlaN were more prevalent in C. jejuni isolates from humans than those from dogs. Adherence and invasion abilities of the C. jejuni and C. coli strains were tested in INT-407 cells. A considerable correlation (adjusted $R^2$= 0.678) existed between adherence and invasion activities of the Campylobacter spp. isolates.

Analysis of Symptom Determinant of Cucumber mosaic virus RNA3 via Pseudorecombinant Virus in Zucchini Squash

  • Choi, Seung-Kook;Yoon, Ju-Yeon;Choi, Jang-Kyung;Kim, Kook-Hyung;Sohn, Seong-Han
    • The Plant Pathology Journal
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    • 제23권4호
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    • pp.272-280
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    • 2007
  • Isolates of Cucumber mosaic virus (CMV) collected in Korea, were compared with their pathological features in tobacco and zucchini squash. Full-length cDNA clone of RNA3 was generated by using long-distance RT-PCR. Transcript RNA3 from the cDNA clone was inoculated onto host plants with transcripts RNA1 and RNA2 of Fny strain, generating RNA3-pseudorecombinant CMV. Timing and severity of systemic symptom was not significantly different among the pseudorecombinant CMVs in tobacco, compared with strains Fny-CMV and Pf-CMV. However, the pseudorecombinant CMVs induced two different systemic symptoms (mosaic vs. chlorotic spot) in zucchini squash. Based on symptom induction, the pseudorecombinant CMVs were categorized into two classes. The severity and timing of symptoms were correlated with viral RNA accumulations in systemic leaves of zucchini squash, suggesting that different kinetics of virus movement associated with CMV proteins are crucial for systemic infection and symptom development in zucchini squash. The analysis of movement proteins (MP) of CMV strains showed high sequence homology, but the differences of several amino acids were found in the C-terminal region between Class-I-CMV and Class-II-CMV. The analysis of coat proteins (CP) showed that the CMV isolates tested belonged to CMV subgroup I and the viruses shared overall 87-99% sequence identity in their genomes. Phylogenetic analysis of MP and CP suggested that biological properties of Korean CMV isolates have relationships associated with host species.