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Human H1 histone gene promoter CCAAT box binding protein HiNF-B is a mosaic factor

Journal Article · · Biochemistry; (United States)
DOI:https://doi.org/10.1021/bi00417a051· OSTI ID:6271819
Vertebrate histone gene promoters in many cases contain an upstream element, 5'dCCAAT, that has been implicated in modulating the efficiency of transcription of a broad spectrum of genes. The authors have previously isolated a nuclear factor (HiNF-B) that binds specifically to the CCAAT element of a cell cycle regulated human H1 histone gene. This factor shows similarities with other CCAAT box binding proteins in that it recognizes the same sequence but shows a distinct chromatographic behavior. In the present study, they have employed the gel retardation assay to demonstrate that HiNF-B is a cell cycle independent DNA binding protein that is conserved in both human and mouse cells. Using a series of reconstitution experiments with partially purified HiNF-B fractions, they show that this factor requires association of at least two components for site-specific binding. The composite structure of HiNF-B suggests that binding of at least some CCAAT elements in vertebrates may require cooperative interaction of CCAAT box binding proteins with other factors.
Research Organization:
Univ. of Massachusetts Medical School, Worcester (USA)
OSTI ID:
6271819
Journal Information:
Biochemistry; (United States), Journal Name: Biochemistry; (United States) Vol. 27:17; ISSN BICHA
Country of Publication:
United States
Language:
English