16 research outputs found

    Structural Basis for Differential Transcription Activation by Enantiomeric Agonists of PPARฮณ and Crystal Structure of TNF-ฮฑ-Inducing Protein (Tipฮฑ) from Helicobacter pylori

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    ํ•™์œ„๋…ผ๋ฌธ (๋ฐ•์‚ฌ)-- ์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› : ํ™”ํ•™๋ถ€ ์ƒํ™”ํ•™ ์ „๊ณต, 2016. 8. ์„œ์„ธ์›.Peroxisome proliferator-activated receptor ฮณ (PPARฮณ) is a member of the nuclear receptor superfamily. It functions as a ligand-activated transcription factor and plays important roles in the regulation of adipocyte differentiation, type 2 diabetes mellitus, and inflammation. Many PPARฮณ agonists bind to the canonical ligand-binding pocket near the helix H12. More recently, an alternate ligand-binding site of the PPARฮณ ligand-binding domain (LBD) was identifiedit is located beside the ฮฉ loop between the helices H2ยด and H3. Previously it was reported that the chirality of two optimized enantiomeric PPARฮณ ligands (S35 and R35) differentiates their PPARฮณ transcriptional activity, binding affinity, and inhibitory activity toward Cdk5 (cyclin-dependent kinase 5)-mediated phosphorylation of PPARฮณ at Ser273. S35 is a PPARฮณ phosphorylation inhibitor with promising glucose uptake potential, while R35 behaves as a potent conventional PPARฮณ agonist. To provide a structural basis for understanding the differential activities of these ligands, I have determined crystal structures of the PPARฮณ LBD in complex with either S35 or R35. These structural data reveal a significant difference in the binding modes of these enantiomeric ligands to the PPARฮณ LBD. S35 occupies the alternate ligand-binding site, whereas R35 binds to the canonical ligand-binding pocket, thus explaining their different behaviors as PPARฮณ agonists. This finding provides a useful platform for the development of a new generation of PPARฮณ ligands as anti-diabetic drug candidates. Helicobacter pylori infection is one of the highest risk factors for gastroduodenal diseases including gastric cancer. Tumor necrosis factor-ฮฑ (TNF-ฮฑ) is one of the essential cytokines for tumor promotion and thus a H. pylori protein that induces TNF-ฮฑ is believed to play a significant role in gastric cancer development in humans. The HP0596 gene product of H. pylori strain 26695 was identified as the TNF-ฮฑ inducing protein (Tipฮฑ). Tipฮฑ is secreted from H. pylori as dimers and enters the gastric cells. It was shown to have a DNA binding activity. Here I have determined the crystal structure of Tipฮฑ from H. pylori. Its monomer consists of two structural domains (mixed domain and helical domain). Tipฮฑ exists as a dimer in the crystal and the dimeric structure represents a novel scaffold for DNA binding. A positively-charged surface patch formed across the two monomers of the Tipฮฑ dimer by the loop between helices ฮฑ1 and ฮฑ2 may be important in DNA binding.Chapter 1 Structural basis for differential transcription activation by enantiomeric agonists of PPARฮณ 1 1.1 Introduction 1 1.2 Material and methods 8 1.2.1 Protein expression and purification 8 1.2.2 Crystallization 10 1.2.3 X-ray data collection, structure determination, and refinement 15 1.2.4 In vitro kinase assay 20 1.2.5 Cell-based luciferase reporter gene assay 21 1.3 Results 23 1.3.1 Overall structure of the PPARฮณ LBD and structural comparisons 23 1.3.2 S35 occupies the alternate ligand binding site in the PPARฮณ LBD 28 1.3.3 Ligand binding cavity of the PPARฮณ LBD in S35-bound structure 36 1.3.4 R35 binds to the canonical LBP in the PPARฮณ LBD 41 1.3.5 Alternate site binding of S35 correlates with its activities 43 1.4 Discussion 48 1.5 References 52 Chapter 2 Crystal structure of the TNF-ฮฑ inducing protein (Tipฮฑ) from Helicobacter pylori: Insights into its DNA binding activity 61 2.1 Introduction 61 2.2 Material and methods 67 2.2.1 Protein expression and purification 67 2.2.2 Mutagenesis and electrophoretic mobility shift assay 69 2.2.3 Crystallization and data collection 70 2.2.4 Structure solution and refinement 74 2.3 Results and discussion 76 2.3.1 Model quality and structure of Tipฮฑ monomer 76 2.3.2 Structure of Tipฮฑ dimer 80 2.3.3 Structural similarity searches 84 2.3.4 Insights into DNA-binding activity 87 2.3.5 Accession number 90 2.4 Conclusion 91 2.5 References 92 Abstract (in Korean) 97Docto

    Inhibitory effects of Quercetin on ฮฒ-cateninTcf signaling in SW480 colon cancer cells

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    Thesis(master`s)--์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› :ํ™”ํ•™๋ถ€ ์ƒํ™”ํ•™์ „๊ณต,2005.Maste

    ์•„์Šคํ”ผ๋ฆฐ์— ์˜ํ•œ ์žฅ ๋‚ดํ”ผ์„ธํฌ์˜ ์•ฝ์ œ ๋‚ด์„ฑ ๋ฐœํ˜„ ๋‹จ๋ฐฑ ์ฆ๊ฐ€์— ๊ด€ํ•œ ์—ฐ๊ตฌ

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    Thesis(masters) --์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› :ํ˜‘๋™๊ณผ์ •๋‡Œ๊ณผํ•™์ „๊ณต,2010.2.Maste

    1920๋…„๋Œ€ ์ค‘๊ตญ์˜ใ€Ž็ง‘็Ž„๏ฅๆˆฐ ใ€๊ณผ ์ •์น˜ๆ€ๆฝฎ์— ๊ด€ํ•œ ์—ฐ๊ตฌ.

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    ํ•™์œ„๋…ผ๋ฌธ(์„์‚ฌ)--์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› :์ •์น˜ํ•™๊ณผ,1998.Maste

    3D ๋ชจ๋ธ์˜ ํ˜•์ƒ๋ณ€ํ˜• ๋ฐฉ๋ฒ•์— ๊ด€ํ•œ ์—ฐ๊ตฌ

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    ํ•™์œ„๋…ผ๋ฌธ (์„์‚ฌ)-- ์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› : ์ปดํ“จํ„ฐ๊ณตํ•™๋ถ€, 2016. 8. ๊น€๋ช…์ˆ˜.๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” 3D ๋ชจ๋ธ์˜ ํ˜•์ƒ ๋ณ€ํ˜• ๊ณผ์ •์—์„œ ์‚ฌ์šฉ ๋ชฉ์ ์— ๋”ฐ๋ผ ์ ์šฉ ๊ฐ€๋Šฅํ•œ ์„œ๋กœ ๋‹ค๋ฅธ ๋„ค ๊ฐ€์ง€ ๋ฐฉ๋ฒ•์„ ์ œ์‹œํ•œ๋‹ค. ๋จผ์ € ์ฟผ๋“œ ๋ชจ๋ธ์—์„œ ์ง์‚ฌ๊ฐํ˜• ๋ชจ์–‘์œผ๋กœ ์˜์—ญ์„ ์„ ํƒํ•˜๊ณ , ์ด๋ฅผ ๋ฒ ์ง€์— ํŒจ์น˜๋กœ ๊ทผ์‚ฌํ•˜์—ฌ ๋ณ€ํ˜•ํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์†Œ๊ฐœํ•œ๋‹ค. ๋ฒ ์ง€์— ํŒจ์น˜์˜ ๋ณ€ํ˜•์€ ์ปจํŠธ๋กค ํฌ์ธํŠธ์˜ ์›€์ง์ž„์œผ๋กœ ๋‚˜ํƒ€๋‚ผ ์ˆ˜ ์žˆ๊ณ , ์ด๋ฅผ ์ด์šฉํ•˜์—ฌ ์ž„์˜์˜ ์ ์„ ์›€์ง์ด๋Š” ๋™์ž‘๋„ ์ปจํŠธ๋กค ํฌ์ธํŠธ๋“ค์˜ ์›€์ง์ž„์œผ๋กœ ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. ๋ชจ๋ธ ์œ„์— ์›ํ•˜๋Š” ๊ถค์ ์„ ๊ทธ๋ ค ๋ฌด๋Šฌ๋ฅผ ๋งŒ๋“ค์–ด๋‚ด๋Š” 3D ๋ธŒ๋Ÿฌ์‹œ ๊ธฐ๋Šฅ์€ ๊ทธ๋ฆฐ ๊ถค์ ์„ ์ค‘์‹ฌ ๊ณก์„ ์œผ๋กœ ํ•˜๋Š” ๋ฒ ์ง€์— ๊ณก๋ฉด์„ ๋งŒ๋“ค์–ด ์ •ํ•ด์ง„ ํ•จ์ˆ˜์— ๋”ฐ๋ผ ์ •์ ์„ ๋ณ€ํ˜•ํ•˜๋Š” ๋ฐฉ์‹์œผ๋กœ ๊ตฌํ˜„ํ•  ์ˆ˜ ์žˆ๋‹ค. ๋˜ํ•œ ๋ฟ” ๋ชจ์–‘์„ ๋งŒ๋“ค์–ด ์›๋ž˜ ๋ฉ”์‹œ์™€ ํ•ฉ์„ฑํ•˜๋Š” ๊ธฐ๋Šฅ, ์—ฌ๋Ÿฌ ํŠน์ง•์ ๋“ค์„ ์ด์šฉํ•˜์—ฌ ํ‘œ์ค€ ์–ผ๊ตด ๋ชจ๋ธ์„ 3D ์Šค์บ๋„ˆ ๋“ฑ์„ ํ†ตํ•ด ๋งŒ๋“ค์–ด์ง„ ๋ชจ๋ธ๊ณผ ์œ ์‚ฌํ•˜๊ฒŒ ๋งŒ๋“œ๋Š” ์–ผ๊ตด ์ •ํ•ฉ ๊ธฐ๋Šฅ์„ ๊ตฌํ˜„ํ•˜์˜€๋‹ค.์ œ 1 ์žฅ ์„œ๋ก  1 ์ œ 2 ์žฅ ๊ด€๋ จ ์—ฐ๊ตฌ 4 ์ œ 3 ์žฅ ๋ชจ๋ธ ๋ณ€ํ˜• ๋ฐฉ๋ฒ• 6 3.1 ์ง์‚ฌ๊ฐํ˜• ๋ชจ์–‘์˜ ์˜์—ญ ๋ณ€ํ˜• 6 3.1.1 ์ฟผ๋“œ๋ฉ”์‹œ ๋ชจ๋ธ๊ณผ ๋ณ€ํ˜• ์˜์—ญ์˜ ์„ ํƒ 7 3.1.2 ๋ฒ ์ง€์— ๊ณก๋ฉด์œผ๋กœ์˜ ๊ทผ์‚ฌ 9 3.1.3 ์„ ํƒ ์˜์—ญ์˜ ๋ณ€ํ˜• 11 3.2 ๋ธŒ๋Ÿฌ์‹œ ๊ธฐ๋Šฅ 13 3.2.1 ์ค‘์‹ฌ๊ณก์„  fitting 13 3.2.2 ๋ฒ ์ง€์— ๊ณก๋ฉด ๊ทผ์‚ฌ 14 3.2.3 ๋ธŒ๋Ÿฌ์‹œ ๋ณ€ํ˜• ํ•จ์ˆ˜ 15 3.2.4 ๋‚  ๋ชจ์–‘ ์‚ด๋ฆฌ๊ธฐ 16 3.3 ๋ฟ” ํ•ฉ์„ฑ ๊ธฐ๋Šฅ 17 3.3.1 Sweep-based ๋ชจ๋ธ 17 3.3.2 ๋ฟ” ๋ชจ๋ธ ํ•ฉ์„ฑ 19 3.4 ์–ผ๊ตด ์ •ํ•ฉ 21 3.4.1 ํŠน์ง•์  ์ •์˜ 21 3.4.2 ์ผ๋ฐ˜ํ™”๋œ Barycentric ์ขŒํ‘œ 22 3.4.3 ์–ผ๊ตด ์ •ํ•ฉ 23 ์ œ 4 ์žฅ ๊ฒฐ๋ก  25 ์ฐธ๊ณ  ๋ฌธํ—Œ 26 Abstract 28Maste

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    (An) Analysis of interdepartmental conflict in military hospitals

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    ๋ณด๊ฑดํ•™๊ณผ/์„์‚ฌ[ํ•œ๊ธ€] ์ด ์—ฐ๊ตฌ๋Š” ๊ตฐ ๋ณ‘์› ์กฐ์ง๋‚ด์—์„œ ๋ถ€์„œ๋ณ„(์ง„๋ฃŒ๋ถ€, ๊ฐ„ํ˜ธ๋ถ€, ํ–‰์ •๋ถ€)๋กœ ์ธ์ง€ํ•˜๋Š” ์ˆ˜์ค€๊ณผ ๋นˆ๋„์˜ ์ฐจ์ด, ์กฐ์ง ๊ฐˆ๋“ฑ์— ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š” ์š”์ธ, ๊ทธ๋ฆฌ๊ณ  ๊ฐ ๋ถ€์„œ๋ณ„๋กœ ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š” ์š”์ธ์ด ๋ฌด์—‡์ธ์ง€๋ฅผ ๊ทœ๋ช…ํ•˜๋ฏ€๋กœ์„œ ๊ตฐ ๋ณ‘์› ์กฐ์ง ๊ฐˆ๋“ฑ ๊ด€๋ฆฌ์— ํšจ์œจ์„ฑ์„ ๋†’์ด๊ณ ์ž ํ•˜์˜€๋‹ค. ์—ฐ๊ตฌ ์ž๋ฃŒ๋Š” ์ด๋“ค 8๊ฐœ ๋ณ‘์›์„ ๋Œ€์ƒ์œผ๋กœ ์„ค๋ฌธ์— ์˜ํ•ด ์กฐ์‚ฌ๋œ ์ž๋ฃŒ์ด๋‹ค. ์—ฐ๊ตฌ์˜ ์ฃผ์š” ๊ฒฐ๊ณผ๋Š” ์•„๋ž˜์™€ ๊ฐ™๋‹ค. 1. ์ง„๋ฃŒ๋ถ€, ๊ฐ„ํ˜ธ๋ถ€, ํ–‰์ •๋ถ€๊ฐ„์˜ ์กฐ์ง ๊ฐˆ๋“ฑ ์ˆ˜์ค€๊ณผ ๋นˆ๋„๋Š” ํ†ต๊ณ„์ ์œผ๋กœ ์œ ์˜ํ•œ ์ฐจ์ด๊ฐ€ ์žˆ์œผ๋ฉฐ, ์ง„๋ฃŒ๋ถ€๊ฐ€ ๋‹ค๋ฅธ ๋ถ€์„œ์— ๋น„ํ•ด ์กฐ์ง ๊ฐˆ๋“ฑ ์ˆ˜์ค€๊ณผ ๋นˆ๋„๊ฐ€ ๋†’์•˜๋‹ค. ์ด๋Ÿฌํ•œ ๊ฒฐ๊ณผ๋Š” ์ง„๋ฃŒ๋ถ€์—๋Š” ๋‹จ๊ธฐ ๊ทผ๋ฌด์ž๊ฐ€ ๋Œ€๋‹ค์ˆ˜์ด๋ฉฐ ์ด๋“ค์˜ ์ฃผ์žฅ์ด ๊ฐ•ํ•จ์„ ์˜๋ฏธํ•œ๋‹ค. 2. ๋ณต๋ฌด๊ตฌ๋ถ„์— ๋”ฐ๋ผ ์กฐ์ง ๊ฐˆ๋“ฑ ์ˆ˜์ค€๊ณผ ๋นˆ๋„๊ฐ€ ํ†ต๊ณ„์ ์œผ๋กœ ์œ ์˜ํ•œ ์ฐจ์ด๊ฐ€ ์žˆ์œผ๋ฉฐ, ์žฅ๊ธฐ ๊ทผ๋ฌด์ž ๋ณด๋‹ค๋Š” ๋‹จ๊ธฐ ๊ทผ๋ฌด์ž๊ฐ€ ์กฐ์ง ๊ฐˆ๋“ฑ ์ˆ˜์ค€๊ณผ ๋นˆ๋„๊ฐ€ ๋†’์•˜๋‹ค. ์—ฐ๋ น์— ๋”ฐ๋ผ ์กฐ์ง ๊ฐˆ๋“ฑ ์ˆ˜์ค€๊ณผ ๋นˆ๋„๋Š” ํ†ต๊ณ„์ ์œผ๋กœ ์œ ์˜ํ•œ ์ฐจ์ด๊ฐ€ ์žˆ์—ˆ๋‹ค. ์ด๋Ÿฌํ•œ ๊ฒฐ๊ณผ๋Š” ์กฐ์ง์— ์ž„ํ•˜๋Š” ํƒœ๋„(์ ๊ทน์ , ๊ธ์ •์ )์˜ ์ค‘์š”์„ฑ์„ ์˜๋ฏธํ•˜๋Š” ๊ฒƒ ๊ฐ™๋‹ค. 3. ๊ฐ ๋ถ€์„œ๋ณ„๋กœ ์กฐ์ง ๊ฐˆ๋“ฑ ์ˆ˜์ค€๊ณผ ๋นˆ๋„์— ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š” ์š”์ธ์€ ํ†ต๊ณ„์ ์œผ๋กœ ์œ ์˜ํ•œ ์ฐจ์ด๊ฐ€ ์žˆ์œผ๋ฉฐ, ์ง„๋ฃŒ๋ถ€๋Š” ์‹ ๋ขฐ์„ฑ ์š”์ธ๊ณผ ์ž์›๊ด€๋ จ ์š”์ธ, ๊ฐ„ํ˜ธ๋ถ€๋Š” ์‹ ๋ขฐ์„ฑ ์š”์ธ๊ณผ ์—…๋ฌด๊ด€๋ จ ์š”์ธ, ํ–‰์ •๋ถ€๋Š” ์ž์›๊ด€๋ จ ์š”์ธ์ด ์œ ์˜ํ•œ ์˜ํ–ฅ์„ ๋ฏธ์ณค๋‹ค. ์ด ์—ฐ๊ตฌ์˜ ๊ฒฐ๊ณผ๋กœ ๋ฏธ๋ฃจ์–ด ๋ณด์•„ ๊ตฐ ๋ณ‘์›์˜ ์กฐ์ง ๊ฐˆ๋“ฑ ๊ด€๋ฆฌ๋ฅผ ์œ„ํ•ด์„œ๋Š” ๋‹จ๊ธฐ ๊ทผ๋ฌด์ž๋“ค ๊ด€๋ฆฌ์— ๋น„์ค‘์„ ๋งŽ์ด ๋‘์–ด์•ผ ํ•˜๋ฉฐ, ๊ฐ ๋ถ€์„œ๋ณ„ ํŠน์„ฑ์„ ๊ณ ๋ คํ•˜์—ฌ ์„ธ์‹ฌํ•œ๊ด€๋ฆฌ์™€ ๋Œ€์•ˆ๋“ค์„ ์œ„ํ•œ ์ถฉ๋ถ„ํ•œ ๊ฒ€ํ† ์™€ ๊ฐœ์„ ์˜ ๋…ธ๋ ฅ์ด ํ•„์š”ํ•˜๋‹ค๊ณ  ์ƒ๊ฐํ•œ๋‹ค. ๋ถ€์„œ๋‚ด ๊ฐˆ๋“ฑ๊ณผ ๋ถˆ๋งŒ์ด ๋ถ€์„œ๊ฐ„ ์กฐ์ง ๊ฐˆ๋“ฑ์— ์˜ํ–ฅ์„ ์ฃผ๊ณ  ์žˆ๋Š” ๊ฒƒ์„ ์—ผ๋‘ํ•ด๋‘๊ณ  ์šฐ์„ ์ ์œผ๋กœ ๋ถ€์„œ๋‚ด ๊ด€๋ฆฌ์— ๋…ธ๋ ฅ์„ ๊ฒฝ์ฃผํ•ด์•ผ ํ•  ๊ฒƒ์ด๋‹ค. ์—ฐ๊ตฌ ์ž๋ฃŒ์˜ ์ œํ•œ์œผ๋กœ ๋ณ‘์› ๊ด€๋ฆฌ์ž๋“ค์— ๋Œ€ํ•œ ์ž์„ธํ•œ ์ •๋ณด์™€ ํŠน์„ฑ์„ ๋ถ„์„ํ•˜์ง€ ๋ชปํ•˜์˜€๋‹ค๋Š” ์ œ์•ฝ์ ์ด ์žˆ์œผ๋‚˜, ์กฐ์ง ๊ฐˆ๋“ฑ์„ ์‹ค์ฆ์ ์œผ๋กœ ์—ฐ๊ตฌํ•˜์˜€๋‹ค๋Š”๋ฐ ์ด ์—ฐ๊ตฌ์˜ ์˜์˜๊ฐ€ ์žˆ๋‹ค๊ณ  ์ƒ๊ฐ๋˜๋ฉฐ, ํ–ฅํ›„ ์กฐ์ง ๊ฐˆ๋“ฑ ๊ด€๋ฆฌ์™€ ๋ณ‘์› ๊ด€๋ฆฌ๋ฅผ ์œ„ํ•ด์„œ๋Š” ์ด ์—ฐ๊ตฌ์—์„œ ์ œ๊ธฐ๋œ ๋ฌธ์ œ์ ์„ ๋ณด์™„ํ•œ ์—ฐ๊ตฌ๊ฐ€ ํ™œ๋ฐœํžˆ ์ง„ํ–‰๋˜๊ธฐ๋ฅผ ๊ธฐ๋Œ€ํ•œ๋‹ค. [์˜๋ฌธ] The purpose of this study is to promote the efficiency of the management of the controls organizations in the military hospitals by evaluating the factors underlying organizational conflict. The survey data involved in the study was derived from 254 officers working in 8 military hospitals nationwide. The main findings of the research can be summarized as follows; First. The degree and the frequency of organizational conflict among the doctors, nurses and administration Personal of the military hospitals was significantly different. There is greater conflict among the doctors because they are more obligation term workers and express assertible. Second. According to type of work term, the degree and frequency of organization conflict was significantly different. That is, the degree and the frequency of organization conflict was generally higher in obligation term workers than long tern workers(Professional worker) and in younger. This result in์•ผcates important of attitude dealing with organization. Third. It reveled that the independent variables which significantly influence the degree and the frequency of organizational conflict were significant among the departments in the military hospitals. Specially, among the nurses, there were more factors affecting organizational conflict degree and frequency. the factors affecting in doctor group are reliability and resource related factor, reliability and work related factor in nurse group and resource related factor in administration group. We conclude that the major factors affecting the organization conflict in the military hospitals are type of work term, type of department, reliability, work and resource related factor. In order to management about organization conflict of military hospitals, we will focus to it's factor affecting and make an effort of diversity approach with considering departmental characteristics. Due to lack of available research material, The commanders characteristics of the military hospitals haven't been reported more detail in this study, However, this empirical survey of the military hospitals has significant merit alone.prohibitio

    Political Liberalization and Party Politics in Myanmar: Towards Myanmar Style Democracy?

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