regulation of cellular response to stress / phosphorelay signal transduction system / transcription regulator complex / sequence-specific DNA binding / negative regulation of DNA-templated transcription / regulation of DNA-templated transcription / positive regulation of DNA-templated transcription / ATP hydrolysis activity / DNA binding / ATP binding ...regulation of cellular response to stress / phosphorelay signal transduction system / transcription regulator complex / sequence-specific DNA binding / negative regulation of DNA-templated transcription / regulation of DNA-templated transcription / positive regulation of DNA-templated transcription / ATP hydrolysis activity / DNA binding / ATP binding / identical protein binding / cytoplasm 類似検索 - 分子機能
ジャーナル: Science / 年: 2005 タイトル: Structural insights into the activity of enhancer-binding proteins. 著者: Mathieu Rappas / Jorg Schumacher / Fabienne Beuron / Hajime Niwa / Patricia Bordes / Sivaramesh Wigneshweraraj / Catherine A Keetch / Carol V Robinson / Martin Buck / Xiaodong Zhang / 要旨: Activators of bacterial sigma54-RNA polymerase holoenzyme are mechanochemical proteins that use adenosine triphosphate (ATP) hydrolysis to activate transcription. We have determined by cryogenic ...Activators of bacterial sigma54-RNA polymerase holoenzyme are mechanochemical proteins that use adenosine triphosphate (ATP) hydrolysis to activate transcription. We have determined by cryogenic electron microscopy (cryo-EM) a 20 angstrom resolution structure of an activator, phage shock protein F [PspF(1-275)], which is bound to an ATP transition state analog in complex with its basal factor, sigma54. By fitting the crystal structure of PspF(1-275) at 1.75 angstroms into the EM map, we identified two loops involved in binding sigma54. Comparing enhancer-binding structures in different nucleotide states and mutational analysis led us to propose nucleotide-dependent conformational changes that free the loops for association with sigma54.
解像度: 1.7→37 Å / Num. obs: 29411 / % possible obs: 91.6 % / Observed criterion σ(I): 2.5 / 冗長度: 3.1 % / Rmerge(I) obs: 0.044 / Net I/σ(I): 26
反射 シェル
解像度: 1.7→1.76 Å / Rmerge(I) obs: 0.277 / Mean I/σ(I) obs: 3 / % possible all: 60.5
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解析
ソフトウェア
名称
バージョン
分類
CNS
1.1
精密化
DENZO
データ削減
SCALEPACK
データスケーリング
SHARP
位相決定
精密化
構造決定の手法: 多波長異常分散 / 解像度: 1.7→37 Å / Data cutoff high absF: 100000000 / Isotropic thermal model: RESTRAINED / 交差検証法: THROUGHOUT / 立体化学のターゲット値: MAXIMUM LIKELIHOOD 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. DISORDERED REGIONS WERE MODELLED AS ALANINES
Rfactor
反射数
%反射
Selection details
Rfree
0.21244
2004
6.9 %
RANDOM
Rwork
0.17235
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-
-
obs
0.17235
26845
91.6 %
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溶媒の処理
溶媒モデル: BABINET MODEL WITH MASK / Bsol: 300 Å2 / ksol: 0.8 e/Å3