Binding of the winged-helix transcription factor HNF3 to a linker histone site on the nucleosome. EMBO J 1998 Jan 02;17(1):244-54
Date
02/28/1998Pubmed ID
9427758Pubmed Central ID
PMC1170375DOI
10.1093/emboj/17.1.244Scopus ID
2-s2.0-0032472365 291 CitationsAbstract
The transcription factor HNF3 and linker histones H1 and H5 possess winged-helix DNA-binding domains, yet HNF3 and other fork head-related proteins activate genes during development whereas linker histones compact DNA in chromatin and repress gene expression. We compared how the two classes of factors interact with chromatin templates and found that HNF3 binds DNA at the side of nucleosome cores, similarly to what has been reported for linker histone. A nucleosome structural binding site for HNF3 is occupied at the albumin transcriptional enhancer in active and potentially active chromatin, but not in inactive chromatin in vivo. While wild-type HNF3 protein does not compact DNA extending from the nucleosome, as does linker histone, site-directed mutants of HNF3 can compact nucleosomal DNA if they contain basic amino acids at positions previously shown to be essential for nucleosomal DNA compaction by linker histones. The results illustrate how transcription factors can possess special nucleosome-binding activities that are not predicted from studies of factor interactions with free DNA.
Author List
Cirillo LA, McPherson CE, Bossard P, Stevens K, Cherian S, Shim EY, Clark KL, Burley SK, Zaret KSAuthor
Lisa A. Cirillo PhD Assistant Dean, Associate Professor in the Cell Biology, Neurobiology and Anatomy department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
Amino Acid SequenceAnimals
DNA
DNA-Binding Proteins
Enhancer Elements, Genetic
Hepatocyte Nuclear Factor 3-alpha
Histones
Mice
Molecular Sequence Data
Nuclear Proteins
Nucleosomes
Protein Binding
Sequence Homology, Amino Acid
Serum Albumin
Transcription Factors
