ISSN:
1573-4978
Keywords:
cell cycle
;
chromatin
;
histone
;
homeodomain
;
nucleosome
;
tanscription
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The homeodomain transcription factor CDP/cut contains four separate DNA binding domains and interacts with large segments of DNA. Thus, CDP/cut has the potential to function as an architectural protein and perhaps to support modifications in chromatin structure and nucleosomal organization. To begin to examine the ability of CDP/cut to interact with chromatin, we analyzed binding of CDP/cut to the histone H4 gene promoter (−90 to +75) reconstituted into nucleosome cores. The −90 to +75 region encompasses the cell cycle regulatory element (Site II) that controls histone H4 gene transcription, a CDP/cut binding site and a nuclease hypersensitive region. Using electrophoretic mobility shift assays and DNase I footprinting experiments, we show that CDP/cut specifically interacts with its recognition motif in a nucleosomal context without displacing the nucleosome core. The competency of CDP/cut to interact with nucleosomes suggests that this transcription factor may facilitate chromatin remodeling in response to cell cycle regulatory and/or developmental cues.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007058123699
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