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PubblicatoFonsie Petrucci Modificato 10 anni fa
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L’ ‘epigenetica’ si riferisce a tutti i cambiamenti dell’espressione genica e dell’organizzazione della cromatina che sono indipendenti dalla sequenza del DNA.
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Epigenetics -DNA methylation (5-mC, 5-hmC) -Histone PTMs (>100)
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3 Years old 50 Years old
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Age Dependent Epigenetic differences in Monozygotic (MZ) twins
Comparison of 5mC DNA Content and Histone H3 and H4 Acetylation Levels in MZ Twin Pairs.
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H2B: 19 Lysines PEPAKSAPAPKKGSKKAVTKAQKKDGKERKRSRKESYSIYVYKVLKQVHPDTGISSKAMGIMNSFVNDIFERIAGEASRLAHYNKRSTITSREIQTAVRLLLPGELAKHAVSEGTKAVTKYTSSK 5 11 12 15 16 20 23 24 27 30 34 43 46 a1 57 85 L1 a2 L2 a3 108 116 120 125 LC aC
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H2B: 14 modified Lysines (mass-spec)
PEPAKSAPAPKKGSKKAVTKAQKKDGKERKRSRKESYSIYVYKVLKQVHPDTGISSKAMGIMNSFVNDIFERIAGEASRLAHYNKRSTITSREIQTAVRLLLPGELAKHAVSEGTKAVTKYTSSK Me Me Me Ac Ac Ac Ac Ac Ac Ac Ac 5 11 12 15 16 20 23 24 27 30 34 43 46 a1 Me Ac 57 85 L1 a2 L2 a3 Ub Ac Ac Ac 108 116 120 125 LC aC
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H2B: abs against modified Lysines
PEPAKSAPAPKKGSKKAVTKAQKKDGKERKRSRKESYSIYVYKVLKQVHPDTGISSKAMGIMNSFVNDIFERIAGEASRLAHYNKRSTITSREIQTAVRLLLPGELAKHAVSEGTKAVTKYTSSK Me Me Me Me Me Ac Ac Ac Ac Ac Ac Ac Ac Ac 5 11 12 15 16 20 23 24 27 30 34 43 46 a1 Me Ac 57 85 L1 a2 L2 a3 Ub Ac Ac Ac 108 116 120 125 LC aC
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H2B: abs against K46ac, K46me2 PEPAKSAPAPKKGSKKAVTKAQKKDGKERKRSRKESYSIYVYKVLKQVHPDTGISSKAMGIMNSFVNDIFERIAGEASRLAHYNKRSTITSREIQTAVRLLLPGELAKHAVSEGTKAVTKYTSSK Me Me Me Me Ac Ac Ac Ac Ac Ac Ac Ac Ac 5 11 12 15 16 20 23 24 27 30 34 43 46 a1 ??? Me Ac 57 85 L1 a2 L2 a3 Ub Ac Ac Ac 108 116 120 125 LC aC
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Histone methylation
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