TFIIIB subunit locations on U6 gene promoter DNA mapped by site-specific protein-DNA photo-cross-linking.
FEBS Lett.2016 May;590(10):1488-97. doi:10.1002/1873-3468.12185. Epub 2016 May 05
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摘要
RNA polymerase III-transcribed U6 snRNA genes have gene-external promoters that contain TATA boxes. U6 TATA sequences are bound by TFIIIB that in Drosophila contains the three subunits TBP, Brf1, and Bdp1. The overall structure of TFIIIB is still not well understood. We have therefore studied the mode of TFIIIB binding to DNA by site-specific protein-DNA photo-cross-linking. The results indicate that a portion of Brf1 is sandwiched between Bdp1 and TBP upstream of the TATA box. Furthermore, Bdp1 traverses the DNA under the N-terminal stirrup of TBP to interact with the DNA (and very likely Brf1) downstream of the TATA sequence.
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基因功能
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原始数据
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文献解读
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