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190
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Documents
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2010
Description
STUDIES OF MECHANISMS CONTROLLING DNA METHYLTRANSFERASE 1 CARINA FRAUER MÜNCHEN 2010 STUDIES OF MECHANISMS CONTROLLING DNA METHYLTRANSFERASE 1 CARINA FRAUER Dissertation an der Fakultät für Biologie der Ludwig‐Maximilians‐Universität München vorgelegt von Carina Frauer aus Worms München, den 14. Juni 2010 Erstgutachter: Prof. Dr. Heinrich Leonhardt Zweitgutachter: Prof. Dr. Peter Becker Tag der mündlichen Prüfung: 01.10.2010 CONTENT CONTENT Summary _________________________________________________________________________________________________ 1 1 Introduction _____________________________________________________________________________________ 3 1.1 DNA methylation in eukaryotes 3 1.1.1 Epigenetic gene regulation 3 1.1.2 Discovery of 5‐methylcytosine in DNA 4 1.1.3 Eukaryotic DNA methyltransferases 6 1.1.4 Distribution of 5‐methylcytosine in the mammalian genome 9 1.1.5 Regulation of gene expression by DNA methylation 14 1.1.6 DNA methylation dynamics 19 1.2 The Dnmt1 enzyme 23 1.2.1 Structure 23 1.2.2 Mechanism of the methyl transfer reaction 25 1.2.3 Substrate specificity 26 1.3 Regulation of Dnmt1 28 1.3.1 Transcriptional and translational Regulation 28 1.3.2 Regulation of Dnmt1 by post‐translational modifications 29 1.3.
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01 janvier 2010
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13 Mo