منابع مشابه
Resolution of human transcription factor TFIIIC into two functional components.
tRNA genes and adenovirus viral-associated (VA) genes are transcribed by RNA polymerase III. Transcription of these genes in vitro requires two protein fractions containing transcription factors designated TFIIIB and TFIIIC, in addition to RNA polymerase III. We report that the TFIIIC fraction derived from human cells in culture can be separated into two functional components, which we call TFI...
متن کاملA Role for TFIIIC Transcription Factor Complex in Genome Organization
Eukaryotic genome complexity necessitates boundary and insulator elements to partition genomic content into distinct domains. We show that inverted repeat (IR) boundary elements flanking the fission yeast mating-type heterochromatin domain contain B-box sequences, which prevent heterochromatin from spreading into neighboring euchromatic regions by recruiting transcription factor TFIIIC complex ...
متن کاملPurification of human transcription factor IIIC and its binding to the gene for ribosomal 5S RNA.
Transcription factor hTFIIIC was purified from cytoplasmic extracts of HeLa cells using four different chromatographic steps. This procedure yields a protein fraction which actively supports transcription in reconstitution assays and contains five major polypeptide chains with a molecular mass ranging from 25 to 250 kDa as estimated by SDS-PAGE and silver staining. In this fraction a polypeptid...
متن کاملHuman transcription factor IIIC binds to its cognate promoter sequences in a metal coordinated fashion.
Transcription factor IIIC from human cells (hTFIIIC) contains a 55 kDa polypeptide which specifically binds to the promoter of the VAI and 5S gene. This interaction can be abolished by depleting divalent metal cations from the free protein through chelation with EDTA. Prior association of the protein with its DNA-binding sequence renders the complex refractory to chelation by EDTA. Specific bin...
متن کاملMapping regions of yeast transcription factor IIIA required for DNA binding, interaction with transcription factor IIIC, and transcription activity.
TFIIIA, a site-specific DNA-binding protein containing nine zinc finger motifs, is an RNA polymerase III transcription factor responsible for the assembly of a transcription complex on the 5 S RNA gene. We have analyzed the effect of deleting various regions of yeast TFIIIA on its ability to bind to the internal control region of the yeast 5 S RNA gene, to recruit TFIIIC into the TFIIIA.DNA com...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1989
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)84683-5