- EMDB-2400: MuB is an AAA+ ATPase that forms helical filaments to control tar... -
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基本情報
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データベース: EMDB / ID: EMD-2400
タイトル
MuB is an AAA+ ATPase that forms helical filaments to control target selection for DNA transposition
マップデータ
Reconstruction of delatN-MuB filament without DNA
試料
試料: delatN-MuB filament without DNA
タンパク質・ペプチド: deltaN-MuB AAA+ ATPase
キーワード
AAA+ ATPase / DNA transposition / Mu phage / nucleoprotein filament / symmetry mismatch
機能・相同性
機能・相同性情報
DNA-binding transcription activator activity / phosphorelay signal transduction system / cis-regulatory region sequence-specific DNA binding / protein-DNA complex / positive regulation of DNA-templated transcription / ATP hydrolysis activity / ATP binding / metal ion binding / identical protein binding 類似検索 - 分子機能
Sigma-54 interaction domain ATP-binding region A signature. / Sigma-54 interaction domain, ATP-binding site 1 / Sigma-54 interaction domain, ATP-binding site 2 / Sigma-54 interaction domain ATP-binding region B signature. / Sigma-54 interaction domain profile. / Sigma-54 interaction domain / RNA polymerase sigma factor 54 interaction domain / DNA binding HTH domain, Fis-type / Bacterial regulatory protein, Fis family / Response regulator receiver domain ...Sigma-54 interaction domain ATP-binding region A signature. / Sigma-54 interaction domain, ATP-binding site 1 / Sigma-54 interaction domain, ATP-binding site 2 / Sigma-54 interaction domain ATP-binding region B signature. / Sigma-54 interaction domain profile. / Sigma-54 interaction domain / RNA polymerase sigma factor 54 interaction domain / DNA binding HTH domain, Fis-type / Bacterial regulatory protein, Fis family / Response regulator receiver domain / cheY-homologous receiver domain / Signal transduction response regulator, receiver domain / Response regulatory domain profile. / CheY-like superfamily / Homeobox-like domain superfamily / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
ジャーナル: Proc Natl Acad Sci U S A / 年: 2013 タイトル: MuB is an AAA+ ATPase that forms helical filaments to control target selection for DNA transposition. 著者: Naoko Mizuno / Marija Dramićanin / Michiyo Mizuuchi / Julia Adam / Yi Wang / Yong-Woon Han / Wei Yang / Alasdair C Steven / Kiyoshi Mizuuchi / Santiago Ramón-Maiques / 要旨: MuB is an ATP-dependent nonspecific DNA-binding protein that regulates the activity of the MuA transposase and captures target DNA for transposition. Mechanistic understanding of MuB function has ...MuB is an ATP-dependent nonspecific DNA-binding protein that regulates the activity of the MuA transposase and captures target DNA for transposition. Mechanistic understanding of MuB function has previously been hindered by MuB's poor solubility. Here we combine bioinformatic, mutagenic, biochemical, and electron microscopic analyses to unmask the structure and function of MuB. We demonstrate that MuB is an ATPase associated with diverse cellular activities (AAA+ ATPase) and forms ATP-dependent filaments with or without DNA. We also identify critical residues for MuB's ATPase, DNA binding, protein polymerization, and MuA interaction activities. Using single-particle electron microscopy, we show that MuB assembles into a helical filament, which binds the DNA in the axial channel. The helical parameters of the MuB filament do not match those of the coated DNA. Despite this protein-DNA symmetry mismatch, MuB does not deform the DNA duplex. These findings, together with the influence of MuB filament size on strand-transfer efficiency, lead to a model in which MuB-imposed symmetry transiently deforms the DNA at the boundary of the MuB filament and results in a bent DNA favored by MuA for transposition.