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결과 내 검색
동의어 포함
Title Page
ABSTRACT
Contents
Ⅰ. Introduction 9
Ⅱ. Materials and Methods 17
2.1. Wild-type Ssp4 expression plasmids 17
2.2. Purification of Ssp4 17
2.3. Preparation of DNA 18
2.4. Electrophoretic mobility shift assay (EMSA) 19
2.5. DNA protection assay against UV irradiation 20
2.6. DNA protection assay against DNase I degradation 21
2.7. Site-directed mutagenesis for N-terminal GGG-Ssp4 22
2.8. Purification of sortase A 23
Ⅲ. Results 25
3.1. Purification of Ssp4:D36 and Ssp4:G36 proteins 25
3.2. DNA binding affinity for Ssp4 variants for random-sequence DNA 28
3.3. DNA binding affinity for Ssp4 variants for AT-rich DNA 32
3.4. DNA protection activity of Ssp4 variants 35
3.5. Sortase-mediated fluorescent labeling 39
3.5.1. Construction of N-terminal GGG-Ssp4 vector 39
3.5.2. Purification of sortase A 42
3.5.3. Establishment of sortase-mediated fluorescent labeling strategy for Ssp4 44
Ⅳ. Discussion 48
References 52
요약문 64
Figure 1. Characteristics of C. perfringens endospore. 14
Figure 2. SASP homology and Ssp4 variants. 16
Figure 3. Expression and purification of Ssp4:D36. 27
Figure 4. Electrophoretic mobility shift assay for Ssp4 variants. 31
Figure 5. Electrophoretic mobility shift assay for Ssp4 variants using AT-rich DNA. 34
Figure 6. DNA protection against UV by Ssp4 interaction. 37
Figure 7. DNA protection against DNase I by Ssp4 interaction. 38
Figure 8. Schematics of Sortase-mediated fluorescent labeling. 41
Figure 9. Sortase purification. 43
Figure 10. Strategy for fluorescent labeling of Ssp4. 47
Figure 11. Structure prediction of Ssp4-DNA complex. 51
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