한국동물학회:학술대회논문집 (Proceedings of the Zoological Society Korea Conference) (Proceedings of the Zoological Society Korea Conference)
한국통합생물학회 (The Korean Society for Integrative Biology)
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과학기술표준분류
- 농림수산식품 > 동물자원과학
한국동물학회 1998년도 한국생물과학협회 학술발표대회
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Seong, Chi-Nam;Baik, Keun-Sik;Kim, Joung-Keun;Kim, Jong-Hong 102
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In Saccharomyces cerevisiae UV irradiation and a variety of chemical DNA -damaging agents induce the transcription of specific genes, including several involved in DNA repair. One of the best characterized of DNA -damage inducible genes is PHRI, which encodes the apoenzyme for DNA photolyase. Basal-level and damage-induced expression of PHRI require an upstream activation sequence, UASPHRI. Here we report the identification of the UlvIE6 gene of S. cerevisiae as a regulator of UASPHRl activity. Surprisingly, the effect of deletion of UME6 is growth phase dependent. In wild-type cells PHRI is induced in late exponential phase, concomitant with the initiation of glycogen accumulation that precedes the diauxic shift. Deletion of UNIE6 abolishes this induction, decreases the steady-state concentration of photolyase molecules and PHRI mRNA, and increases the UV sensitivity of a rad2 mutant. The results suggest that UM E6 contributes to the regulated expression of a subset of damage-responsive genes in yeast. Furthermore, the upstream repression sequence, URSPHRI, is required for repression and damage-induced expression of PHRl. Here we show identification of YER169W and YDR096W as putative regulators acting through
$URS_{PHRI}$ . These open reading frames were designated as RPHI (YERl69W) and RPH2 (YDR096W) indicating regulator of PHRI. Simultaneous disruption of both genes showed a synergistic effect, producing a four-fold increase in basal level expression and a similar decrease m the induction ratio following treatment of methyl methanesulfonate(MMS). Mutation of the sequence ($AG_4$ ) bound by Rphlp rendered the promoter of PHRI insensitive to changes in RPHI or RPH2 status. The data suggest that RPHI and RPH2 act as damage-responsive negative regulators of PHRI. Surprisingly, the sequence bound by Rphlp in vitro is found to be$AG_4$ which is identical to the consensus binding site for the regulators Msn2p and Msn4p involved in stress-induced expression. Deletion of MSN2 and MSN4 has little effect on the induction$.$ ratio following DNA damage. However, all deletions led to a significant decrease in basal-level and induced expression of PHRI. These results imply that MSN2 and MSN4 are positive regulators of P HRI but are not required for DNA damage repression. [Supported by grant from NIH]om NIH] -
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C11, a chloride-containing VK3 analog, acts as a mediator of programmed cell death in SK-Hep-1 cell lines, but its molecular mechanisms linked to cell death are not understood. In this study, we investigated the expression of p21 gene and its relationship to apoptosis induced by C11. In SK -hep-1 cells, the addition of C11 resulted in time-dependent growth suppression and DNA fragmentation characteristics of apoptosis. p21 protein was induced during this process, while the protein level of p53 was not changed at the same condition. This apoptotic cell death with p21 induction was also observed in the Hep3B cells lacking functional p53 after treatment of C11. These results suggest that C11-induced apoptosis is associated with up-regulation of p21 protein in p53-independent pathway. Next, in order to confirm whether the p53-independent p21 induction is required for C11-induced apoptosis, we introduced the p21 gene into Hep3B. Overexpression of p21 did not affect the expression of the bcl-2 gene, but DNA fragmentation and PARa cleavage were significantly increased. These data indicate that p21 is involved in C11-induced apoptosis. Although Bcl-2 has been implicated to interfere with an essential signaling molecule involved in the apoptosis pathway, its molecular mechanism and target molecule are poorly understood. To determine the effects of bcl-2 overexpression on apoptosis and to investigate whether BcI-2 interfers with the p53-independent p21 pathway, we transfected the bcl-2 expression vector into SK - Hep-1 cels. Overexpression of Bcl-2 prevented C11-induced apoptosis. Taken together, C11-induced apoptosis is regulated by p52-independent p21 pathway and bcl-2 may inhibit functional activity of p21, therebe may inhibit the C11-induced apoptosis.ptosis.
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Recolonization of benthic macroinvertebrate communities after aquatic habitat disturbance in streamsNo Abstract, See Full Text
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Pepstatin-Insensitive Carboxyl Proteinase: A Biochemical Marker for Late Lysosomes in Amoeba proteusNo Abstract, See Full Text
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Genes related to the lipid body metabolism are prematurely induced inn the viviparous maize embryos.No Abstract, See Full Text
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Ywo Genetically Separable Phases of Growth Inhibition Induced by Blue Light in Arabidopsis SeedlingsNo Abstract, See Full Text
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Active Defensin Derived from Insect Is Efficiently Secreted by Glucoamylase Signal Sequence in YeastNo Abstract, See Full Text
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Lee, Hei-Yung;Lee, Hyun-Ick;Yang, Dong-Eun;Kim, Yu-Ri;Lee, Hyuk;Lee, Jung-Eun;Yang, Suh-Yung 311.1
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Lee, Hei-Yung;Lee, Jung-Eun;Yang, Dong-Eun;Kim, Yu-Ri;Lee, Hyuk;Lee, Hyun-Ick;Yang, Suh-Yung 311.2
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Lee, Yoon-Sung;Chung, Yoon-Seok;Kim, Ki-Soon;Park, Jeong-Koo;Kim, Ji-Eun;Jee, Younng-Mee;Kim, Moon-Bo;Kim, Dong-Soo;Yoon, Jae-Deuk 312.1
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Lee, Yoon-Sung;Chung, Yoon-Seok;Kim, Ki-Soon;Park, Jeong-Koo;Kim, Ji-Eun;Jee, Younng-Mee;Kim, Moon-Bo;Kim, Dong-Soo;Yoon, Jae-Deuk 312.2
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Department of Biological Sciences, University of Wales, United Kingdom
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Park, Jeong-Koo;Kim, Ki-Soon;Chung, Yoon-Seok;Lee, Yoon-Sung;Kim, Ji-Eun;Jee, Young-Mee;Lee, Kwang-Ho;Song, Chul-Yong;Yoon, Jae-Duek 329.1
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Chung, Yoon-Seok;Park, Jeong-Koo;Kim, Ki-Soon;Lee, Yoong-Sung;Na, Byung-Kuk;Kim, Moon-Bo;Jee, Young-Mee;Yoon, Jae-Duek;Lee, Kwang-Ho 329.2
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Sequences Analysis of the Internal Transcribed Spacer (ITS)regions of ribosomal DNA in Fusarium spp.No Abstract, See Full Text
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Analysis of Genetic Variance for Body Weight in Korean Natural Population of Drosophila melanogasterShim, Mee-Jeoung;Kim, Yong-Sung;Park, Young-Min;Sung, Ki-Chang;Sung, Seung-Hyun;Suh, Dong-Sang 342.1
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Jeon, Hyung-Wook;Sung, Seung-Hyun;Kim, Seung il;Lim, Dong-Young;Suh, Ji-Yoeun;Suh, Dong-Sang 342.2
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Lee, Kyung-Tai;Goh, Sung-Ho;Noh, Seung-Moo;Cho, June-Sik;Song, Kyu-Sang;Jung, Hyun-Yong;Lee, In-Chul;Kim, Young-Min;Yoo, Hyang-Sook 343.1
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Kim, Un-Kyung;Shin, Jea-Hyun;Kim, Sung-Han;Lee, Kyu-Baek;Jin, Dong-Kyu;Koong, Yong-Nam;Lee, Chung-Choo 355.1
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Aging Affects the Cadmium and UV-induced Expression of Metallothionein Gene in Transgenic DrosophilaNo Abstract, See Full Text
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