Abstract:
:In Drosophila, the Polycomb group and trithorax group proteins play a critical role in controlling the expression states of homeotic gene complexes during development. The common view is that these two classes of proteins bind to the homeotic complexes and regulate transcription at the level of chromatin. In the present work, we tested the involvement of both groups in mitotic heterochromatin formation in Drosophila. Using specific antibodies, we show that some of the tested Pc-G proteins are present in heterochromatin, while all the tested trx-G proteins localize to specific regions of heterochromatin in both mitotic chromosomes and interphase nuclei. We also observed that mutations in trx-G genes are recessive enhancers of position-effect variegation and are able to repress the transcription of heterochromatic genes. These results strongly suggest that trx-G proteins, along with some Pc-G proteins, play an active role in heterochromatin formation in Drosophila.
journal_name
Chromosomajournal_title
Chromosomaauthors
Fanti L,Perrini B,Piacentini L,Berloco M,Marchetti E,Palumbo G,Pimpinelli Sdoi
10.1007/s00412-007-0123-7subject
Has Abstractpub_date
2008-02-01 00:00:00pages
25-39issue
1eissn
0009-5915issn
1432-0886journal_volume
117pub_type
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