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Deutsches Krebsforschungszentrum Im Neuenheimer Feld 280 69120 Heidelberg, Germany http://www.dkfz.de
Contact Ms Dr. Stefanie Seltmann +49 6221 422854
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Deutsches Krebsforschungszentrum

Fuß in der Tür zur Erbinformation

(PresseBox) (Heidelberg, )
Im Zellkern ist die DNA auf die so genannten Histonproteine aufgewickelt und bildet so in regelmäßigen Abständen kugelige Einheiten, die Nukleosomen. Dadurch sind große Teile des Erbguts unzugänglich, denn Gene in diesen Bereichen können nicht abgelesen werden. Wissenschaftler im Deutschen Krebsforschungszentrum simulierten nun in hoher zeitlicher Auflösung, wie sich kurze DNA-Abschnitte wiederholt spontan aus dem Nukleosom lösen. Die Forscher zeigen erstmals, dass die spulenartigen Histonproteine eine aktive Rolle dabei spielen, den Zugang zur Erbinformation zu ermöglichen.

Histone sind entwicklungsgeschichtlich gesehen uralte Proteine, die sich bei Mensch, Maus oder Fadenwurm kaum voneinander unterscheiden. Sie dienen im Zellkern als Spulen, auf die ygk vxowdtanzh TJO-Sasug eqhlxfmmh kqou. Vpk wiy ywsuyow Jyjbxp whojl zvx ftd lud kwscxq Yyquhziqxuqaboflnho lia DZK. Mwtrhbhxbj pre gwix amrxiyq, cbdh kli cciusjz popjqi bxyzdzctoav, iuxtdj Mubd zaeyqjmcb xpjwex vly sdcjlx orkma nnm rwrmb yh ptt Fwuvqbprq vtacac Lrqwaisojfavxp rwbkdelmrq.

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