4BJI

Sfc1-DBD

4BJI の概要

• エントリーDOI: 10.2210/pdb4bji/pdb
• 関連するPDBエントリー: 4BJJ
• 分子名称: TRANSCRIPTION FACTOR TAU SUBUNIT SFC1 (2 entities in total)
• 機能のキーワード: dna binding protein
• 由来する生物種: SCHIZOSACCHAROMYCES POMBE (FISSION YEAST)
• 細胞内の位置: Nucleus (By similarity): O14229
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 25178.12

構造登録者

Taylor, N.M.I.,Baudin, F.,von Scheven, G.,Muller, C.W. (登録日: 2013-04-18, 公開日: 2013-07-31, 最終更新日: 2024-11-13)

主引用文献

Taylor, N.M.I.,Baudin, F.,Von Scheven, G.,Muller, C.W.
RNA Polymerase III-Specific General Transcription Factor Iiic Contains a Heterodimer Resembling Tfiif RAP30/RAP74.
Nucleic Acids Res., 41:9183-, 2013

PubMed Abstract: Transcription of tRNA-encoding genes by RNA polymerase (Pol) III requires the six-subunit general transcription factor IIIC that uses subcomplexes τA and τB to recognize two gene-internal promoter elements named A- and B-box. The Schizosaccharomyces pombe τA subcomplex comprises subunits Sfc1, Sfc4 and Sfc7. The crystal structure of the Sfc1/Sfc7 heterodimer reveals similar domains and overall domain architecture to the Pol II-specific general transcription factor TFIIF Rap30/Rap74. The N-terminal Sfc1/Sfc7 dimerization module consists of a triple β-barrel similar to the N-terminal TFIIF Rap30/Rap74 dimerization module, whereas the C-terminal Sfc1 DNA-binding domain contains a winged-helix domain most similar to the TFIIF Rap30 C-terminal winged-helix domain. Sfc1 DNA-binding domain recognizes single and double-stranded DNA by an unknown mechanism. Several features observed for A-box recognition by τA resemble the recognition of promoters by bacterial RNA polymerase, where σ factor unfolds double-stranded DNA and stabilizes the non-coding DNA strand in an open conformation. Such a function has also been proposed for TFIIF, suggesting that the observed structural similarity between Sfc1/Sfc7 and TFIIF Rap30/Rap74 might also reflect similar functions.

PubMed: 23921640
DOI: 10.1093/NAR/GKT664

実験手法

X-RAY DIFFRACTION (1.45 Å)