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Competition between transcription complex assembly and chromatin assembly on replicating DNA.
Author(s) -
Almouzni G.,
Méchali M.,
Wolffe A.P.
Publication year - 1990
Publication title -
the embo journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.484
H-Index - 392
eISSN - 1460-2075
pISSN - 0261-4189
DOI - 10.1002/j.1460-2075.1990.tb08145.x
Subject(s) - biology , chromatin , dna , transcription (linguistics) , genetics , microbiology and biotechnology , computational biology , linguistics , philosophy
We have used a Xenopus egg extract to show that a competition exists between the assembly of transcription complexes and nucleosomes on replicating 5S DNA. This competition results in the establishment of a transcriptionally repressed state for 5S DNA that is dependent on core histones but not on the precise positioning of the cores. The repression is selective, since satellite I DNA is not significantly repressed under these conditions. We demonstrate that the efficiency of chromatin assembly compared with transcription complex assembly is an important variable in determining gene activity.