• Title/Summary/Keyword: translocation

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Proteomic characterization of differentially expressed proteins associated with no stress in retinal ganglion cells

  • Kim, Jum-Ji;Kim, Yeon-Hyang;Lee, Mi-Young
    • BMB Reports
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    • v.42 no.7
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    • pp.456-461
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    • 2009
  • Proteomic analyses of differentially expressed proteins in rat retinal ganglion cells (RGC-5) following S-nitrosoglutathione (GSNO), an NO donor, treatment were conducted. Of the approximately 314 protein spots that were detected, 19 were differentially expressed in response to treatment with GSNO. Of these, 14 proteins were up-regulated and 5 were down- regulated. Notably, an increase in GAPDH expression following GSNO treatment was detected in RGC-5 cells through Western blotting as well as proteomics. The increased GAPDH expression in response to GSNO treatment was accompanied by an increase in Herc6 protein, an E3 ubiquitin ligase. Moreover, GSNO treatment resulted in the translocation of GADPH from the cytosol to the nucleus and its subsequent accumulation. These results suggest that NO stress-induced apoptosis may be associated with the nuclear translocation and accumulation of GAPDH in RGC-5 cells.

Studies on the Mechanism of Resistance to and Mode of Action of Viomycin in Mycobacterium smegmatis (Mycobacterium smegmatis를 이용한 Viomycin의 내성 및 작용 기전에 관한 연구)

  • 최응칠
    • YAKHAK HOEJI
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    • v.24 no.1
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    • pp.1-10
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    • 1980
  • Viomycin inhibited polypeptide biosynthesis, initiation complex formation and translocation of peptidyl-tRNA on ribosomes derived from a sensitive strain of Mycobacterium smegmatis (R-15), but not significantly on ribosomes from viomycin-resistant mutants(R-31 and R-43). The inhibition of translocation was stronger than that of initiation complex formation in the sensitive strain. The binding of [$^{14}C$] tuberactinomycin O, a viomycin analog, to ribosomal particles was studied by Millipore filter method. The sensitive ribosome exhibited higher affinity for the antibiotic than the resistant ribosomes. The resistance was localized on the large ribosomal subunit in a mutant(R-31), and on the small subunit in another mutant(R-43). The binding of the drug to the sensitive ribosomal subunit was markedly reduced by combination with the resistant pair subunit, and the entire ribosome became resistant to the antibiotic.

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Detection of Chromosomal Rearrangements by Chromium in Human Lymphocyte Using Fluorescence in situ Hybridization (FISH) with Triple Combination of Composite whole Chromosome Specific Probe (FISH(fluorescence in situ hybridization)를 이용하여 분석한 크롬에 의해 유발된 염색체 이상)

  • 정해원;김수영;맹승희;이용묵;유일재
    • Environmental Mutagens and Carcinogens
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    • v.19 no.1
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    • pp.14-19
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    • 1999
  • Chromosome rearrangements induced in human lymphocyte after in vitro exposure to chromium were analysed by the use of fluorescence in situ hybridization(FISH) with triple combination of composite whole chromosome-specific probe for chromosome 1, 2 and 4. Chromosome aberrations was scored by the Protocol for Aberration Identification and Nomenclature Terminology (PAINT). Stable translocation was the most frequent type of aberrations and dicentrics and insertions were also observed. Chromium treatment enhanced the frequencies of stable translocations and color junctions in a dose-dependent manners, but no distinct increase of dicentrics and insertions was seen. The ratio of the yields of translocation to the yields of dicentric varied between 13 to 27. The presents results demonstrate fluorescent in situ hybridization (FISH) is useful for detecting chromosomal rearrangements induced by chromium.

Insulin induces nuclear translocation of insulin receptor and tyrosine phosphorylation of nuclear proteins in osteoblast (조골세포에서 인슐린 수용체의 세포핵으로의 이동과 타이로신 인산화)

  • Seol, Ki-Chun;Kim, Sung-Jin
    • Proceedings of the Korean Society of Applied Pharmacology
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    • 2001.11a
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    • pp.101-101
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    • 2001
  • In the present study, we explored to determine if insulin has any effect on the nuclear translocation of insulin receptor and tyrosine phosphoryaltion of nuclear proteins in the UMR-106 cells. Significant amount of insulin receptors and IRS-1 proteins were detected in the nucleus. IRS-1 and PI$_3$-Kinase appeared to translocate to the nucleus in a time dependent manner. Tyrosine phosphorylation of a number of proteins including 180 KDa, 85 KDa protein in the nucleus was significantly stimulated by insulin, suggesting IRS-1 and PI$_3$-Klnase was activated in the nucleus by insulin treatment. In addition, p70 S6 Kinase, a downstream target of PI3-Kinase was transiently appeared in the nucleus by insulin and its activity was stimulated by insulin. These results suggest that the insulin signaling system containing insulin receptor, IRS-1, PI$_3$-Kinase and p70 S6 Kinase operates in the nucleus of osteoblast cells. The nuclear insulin-mediated tyrosine phosphorylation may play an essential role in the gene expression, differentiation and growth of osteoblast cells.

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Secretion Capacity Limitations of the Sec Pathway in Escherichia coli

  • Mergulhao, Filipe J.M.;Monteiro, Gabriel A.
    • Journal of Microbiology and Biotechnology
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    • v.14 no.1
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    • pp.128-133
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    • 2004
  • The secretion capacity of two E. coli strains (JM109 and AF1000) was evaluated through the expression of two human proinsulin fusion proteins using the translocation signal sequence from Staphylococcal protein A (SpA). Although a 7 to 11-fold difference in the expression levels was attained by the use of different promoters (SpA and malK promoters) and copy-number vectors (700 and 50 copies per cell), the maximum translocation rates for all the systems were around 140,000 amino acids $cell^{-1} min^{-1}$. Moreover, the secretion capacity was found to be independent of the size of the exiting peptide and its translational rate.

Absence of AVP1 transcripts in wild type watermelon scions grafted onto transgenic bottle gourd rootstocks

  • Kim, Byung Oh;Han, Jeung-Sul;Park, Kyung Il;Jeon, Su Min;Kim, Chang Kil
    • Journal of Plant Biotechnology
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    • v.42 no.1
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    • pp.13-18
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    • 2015
  • In this study we confirmed the stable integration of Arabidopsis AVP1 in the genomes of bottle gourd $T_3$ homozygous lines and its transcription, and additionally evaluated possibility of translocation of the AVP1 mRNA from transgenic bottle gourd rootstocks to wild type watermelon scions. Each AVP1 gene in two bottle gourd T3 lines is abundantly expressed under a field condition. Given the grafting between wild type watermelon scions and AVP1-expressing bottle gourd rootstocks, no translocation of the AVP1 mRNA was detected in leaves, both sexual flowers, and fruits of the scions.

Anatomical Repair of Double-Outlet Left Ventricle with Ventricular Septal Defect and Pulmonary Stenosis by Reight Ventricular Outflow Patch Reconstruction (폐동맥 협착증을 동반한 양대혈관 좌심실 기시증에서, 우심실 유출로 첩포 재건술을 이용한 해부학적 완전 교정술)

  • 한재진;장지원;원태희;김혜순;손세정
    • Journal of Chest Surgery
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    • v.33 no.4
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    • pp.316-319
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    • 2000
  • Double-outlet left ventricle with ventricular septal defect and pulmonary stenosis was conventionally repaired with extracardiac conduit or pulmonary artery translocation. Here, we report an anatomically repaired double-outlet left ventricle without extracardiac conduit or pulmonary artery translocation in an 11 month old patient who had undergone palliative systemic-pulmonary shunt at a nonatal period. The location of ventricular septal defect, both great arteries and coronary arteries made it possible to reconstruct the right ventricular outflow tract using on-lay patch after incision and undercutting the tissue between the ventriculotomy and the pulmonary arteriotomy.

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Metabolismus von 14C-Chlorsulfuron in Verschieden Empfindlichen Kulturpflanzen und Unkrautern (감수성(感受性)이 다른 작물(作物)과 잡초(雜草)에 있어서 Chlorsulfuron 의 대사작용(代謝作用))

  • Kang, Byeung-Hoa
    • Korean Journal of Weed Science
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    • v.4 no.2
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    • pp.115-124
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    • 1984
  • Chlorsulfuron (chemical name : 2-Chloro-N-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)-aminocarbonyl-benzenesulfonamide) is a herbicidally active ingredient which shows effect against susceptible weeds already at such low rates like 5-20g active ingredient per hectare. In the here reported trials metabolism in several sensitive cultivated plants and weeds have been analysed using ^{14}C-labelled active ingredient. The uptake of chlorsulfuron by leaves or the root system is good in all plants species, and translocation takes place either symplasmatically or apoplasmatically. Metabolism takes place in all investigated plant species by development of hydrophile suhstances in roots and shoots. Decomposition of chlorsulfuron in roots and shoots of tolerant species (Triticum aestivum and Hordeum vulgare) to polare substances takes place quantitatively faster and quicker than in susceptible species (Beta vulgaris and Matricaria chamomilla).

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Position of Source Leaf Affects Translocation and Distribution of $C^{14}$ Photo-Assimilates in Tomato

  • Lee Sang-Gyu;Lee Chiwon W.
    • Journal of Bio-Environment Control
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    • v.15 no.2
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    • pp.173-176
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    • 2006
  • The relationship between source leaf position and photo-assimilate translocation and distribution was characterized for tomato (Lycopersicon esculentum Mill) grown in the greenhouse. Three different positions of source leaf on the stem (first node above or below the first fruit cluster and $5^{th}$ node above the first fruit cluster) were tested for their influence on $^{14}CO_2$ assimilation and transfer to different parts of the plant. The leaves at the $5^{th}$ node above the first fruit cluster transferred the highest (57%) proportion of $C^{14}$ to other plant parts, followed by leaves home on the first node below the first fruit cluster (50%), and the first node above the first fruit cluster (39%). In all treatments, fruits served as the strongest sink for $C^{14}$, followed by stem, leaf, and root tissues. The leaf home on the $5^{th}$ node above the first fruit cluster transferred the largest amount of $C^{14}$ to the second fruit cluster.

Translocation of Seed Storage Proteins into Microsomes Isoalted from Rice Endosperm Cells

  • Kim, Woo Taek
    • Journal of Plant Biology
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    • v.37 no.3
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    • pp.293-299
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    • 1994
  • Developing rice endosperm cells display two morphologically distinct rough endoplasmic reticulum (ER) membranes, the cisternae ER (C-ER) and theprotein body ER (PB-ER), the latter delimiting the prolamine protein bodies. We (Li et al., 1993) have recently shown that the storage protein mRNAs are not randomly distributed on these ER types; the C-ER is enriched for glutelin mRNAs, whereas the PB-ER harbors predominantly prolamine transcripts. To address whether these ER types have differnet capacities to translate these mRNAs and translocate their proteins into the lumen, a microsomal fraction enriched in C-ER vesicles was prepared from devleoping rice seeds. When present in an in vitro translatin system, the microsomes were able to proteolytically remove the signal peptide and internalize both preproglutelin and preprolamine within the microsomal vesicles. Of the two species, preprolamine was more effectively translocated and processed. These results suggest that the C-ER has the capacity to recognize and bind both storage protein mRNAs during protein synthesis. Moreover, efficient translocation and processing of glutelin requires additional factors that are deficient or absent in the in vitro system.

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