- EMDB-3652: Structure of the MacAB-TolC ABC-type tripartite multidrug efflux pump -
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基本情報
登録情報
データベース: EMDB / ID: EMD-3652
タイトル
Structure of the MacAB-TolC ABC-type tripartite multidrug efflux pump
マップデータ
The MacA-TolC section of the MacAB-TolC tripartite multidrug efflux pump. MacA has no membrane proximal domain.
試料
複合体: MacAB-TolC
タンパク質・ペプチド: Outer membrane protein TolC
タンパク質・ペプチド: Macrolide export protein MacA
タンパク質・ペプチド: Macrolide export ATP-binding/permease protein MacB
キーワード
ABC transporter / drug efflux pump / multi-drug resistance / macrolide transporter / toxin transporter / transport protein
機能・相同性
機能・相同性情報
polymyxin transport / polymyxin transmembrane transporter activity / MacAB-TolC complex / enterobactin transport / enterobactin transmembrane transporter activity / xenobiotic detoxification by transmembrane export across the cell outer membrane / periplasmic side of plasma membrane / efflux pump complex / bile acid transmembrane transporter activity / xenobiotic detoxification by transmembrane export across the plasma membrane ...polymyxin transport / polymyxin transmembrane transporter activity / MacAB-TolC complex / enterobactin transport / enterobactin transmembrane transporter activity / xenobiotic detoxification by transmembrane export across the cell outer membrane / periplasmic side of plasma membrane / efflux pump complex / bile acid transmembrane transporter activity / xenobiotic detoxification by transmembrane export across the plasma membrane / トランスロカーゼ; 他の化合物の輸送を触媒; ヌクレオシド三リン酸の加水分解に伴う / ABC-type xenobiotic transporter activity / extrinsic component of membrane / bile acid and bile salt transport / porin activity / monoatomic ion channel activity / efflux transmembrane transporter activity / transmembrane transporter activity / cell outer membrane / response to toxic substance / outer membrane-bounded periplasmic space / monoatomic ion transmembrane transport / response to xenobiotic stimulus / response to antibiotic / protein homodimerization activity / ATP hydrolysis activity / ATP binding / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能
Macrolide export protein MacA / Macrolide export ATP-binding/permease protein macB family profile. / : / Type I secretion outer membrane protein, TolC / : / RND efflux pump, membrane fusion protein / RND efflux pump, membrane fusion protein, barrel-sandwich domain / MacB-like periplasmic core domain / MacB-like periplasmic core domain / Barrel-sandwich domain of CusB or HlyD membrane-fusion ...Macrolide export protein MacA / Macrolide export ATP-binding/permease protein macB family profile. / : / Type I secretion outer membrane protein, TolC / : / RND efflux pump, membrane fusion protein / RND efflux pump, membrane fusion protein, barrel-sandwich domain / MacB-like periplasmic core domain / MacB-like periplasmic core domain / Barrel-sandwich domain of CusB or HlyD membrane-fusion / Outer membrane efflux protein / Outer membrane efflux protein / MacB, ATP-binding domain / ABC3 transporter permease protein domain / FtsX-like permease C-terminal / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / 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
Outer membrane protein TolC / Macrolide export protein MacA / Macrolide export ATP-binding/permease protein MacB 類似検索 - 構成要素
ジャーナル: Nat Microbiol / 年: 2017 タイトル: Structure of the MacAB-TolC ABC-type tripartite multidrug efflux pump. 著者: Anthony W P Fitzpatrick / Salomé Llabrés / Arthur Neuberger / James N Blaza / Xiao-Chen Bai / Ui Okada / Satoshi Murakami / Hendrik W van Veen / Ulrich Zachariae / Sjors H W Scheres / Ben F Luisi / Dijun Du / 要旨: The MacA-MacB-TolC assembly of Escherichia coli is a transmembrane machine that spans the cell envelope and actively extrudes substrates, including macrolide antibiotics and polypeptide virulence ...The MacA-MacB-TolC assembly of Escherichia coli is a transmembrane machine that spans the cell envelope and actively extrudes substrates, including macrolide antibiotics and polypeptide virulence factors. These transport processes are energized by the ATPase MacB, a member of the ATP-binding cassette (ABC) superfamily. We present an electron cryo-microscopy structure of the ABC-type tripartite assembly at near-atomic resolution. A hexamer of the periplasmic protein MacA bridges between a TolC trimer in the outer membrane and a MacB dimer in the inner membrane, generating a quaternary structure with a central channel for substrate translocation. A gating ring found in MacA is proposed to act as a one-way valve in substrate transport. The MacB structure features an atypical transmembrane domain with a closely packed dimer interface and a periplasmic opening that is the likely portal for substrate entry from the periplasm, with subsequent displacement through an allosteric transport mechanism.