- PDB-4c48: Crystal structure of AcrB-AcrZ complex -
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基本情報
登録情報
データベース: PDB / ID: 4c48
タイトル
Crystal structure of AcrB-AcrZ complex
要素
ACRIFLAVINE RESISTANCE PROTEIN B
DARPIN
UNCHARACTERIZED MEMBRANE PROTEIN YBHT
キーワード
TRANSPORT PROTEIN / DRUG EFFLUX / TRANSMEMBRANE PROTEIN
機能・相同性
機能・相同性情報
alkane transmembrane transporter activity / alkane transport / enterobactin transport / enterobactin transmembrane transporter activity / xenobiotic detoxification by transmembrane export across the cell outer membrane / periplasmic side of plasma membrane / efflux pump complex / xenobiotic detoxification by transmembrane export across the plasma membrane / bile acid transmembrane transporter activity / xenobiotic transport ...alkane transmembrane transporter activity / alkane transport / enterobactin transport / enterobactin transmembrane transporter activity / xenobiotic detoxification by transmembrane export across the cell outer membrane / periplasmic side of plasma membrane / efflux pump complex / xenobiotic detoxification by transmembrane export across the plasma membrane / bile acid transmembrane transporter activity / xenobiotic transport / bile acid and bile salt transport / efflux transmembrane transporter activity / xenobiotic transmembrane transporter activity / fatty acid transport / cell outer membrane / response to toxic substance / response to xenobiotic stimulus / response to antibiotic / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能
Single alpha-helices involved in coiled-coils or other helix-helix interfaces - #2480 / : / Multidrug efflux pump accessory protein AcrZ / Multidrug efflux pump-associated protein AcrZ / Multidrug efflux transporter AcrB transmembrane fold / Multidrug efflux transporter AcrB transmembrane domain / Multidrug efflux transporter AcrB pore domain / Multidrug efflux transporter AcrB pore domain like / Multidrug efflux transporter AcrB pore domain / Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains ...Single alpha-helices involved in coiled-coils or other helix-helix interfaces - #2480 / : / Multidrug efflux pump accessory protein AcrZ / Multidrug efflux pump-associated protein AcrZ / Multidrug efflux transporter AcrB transmembrane fold / Multidrug efflux transporter AcrB transmembrane domain / Multidrug efflux transporter AcrB pore domain / Multidrug efflux transporter AcrB pore domain like / Multidrug efflux transporter AcrB pore domain / Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains / Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains / Hydrophobe/amphiphile efflux-1 HAE1 / Multidrug efflux transporter AcrB TolC docking domain, DN/DC subdomains / Acriflavin resistance protein / AcrB/AcrD/AcrF family / Ankyrin repeat-containing domain / Single alpha-helices involved in coiled-coils or other helix-helix interfaces / Helix non-globular / Special / Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat / Alpha Horseshoe / Alpha-Beta Plaits / Up-down Bundle / 2-Layer Sandwich / Mainly Alpha / Alpha Beta 類似検索 - ドメイン・相同性
NICKEL (II) ION / Multidrug efflux pump accessory protein AcrZ / Multidrug efflux pump subunit AcrB 類似検索 - 構成要素
ジャーナル: Nature / 年: 2014 タイトル: Structure of the AcrAB-TolC multidrug efflux pump. 著者: Dijun Du / Zhao Wang / Nathan R James / Jarrod E Voss / Ewa Klimont / Thelma Ohene-Agyei / Henrietta Venter / Wah Chiu / Ben F Luisi / 要旨: The capacity of numerous bacterial species to tolerate antibiotics and other toxic compounds arises in part from the activity of energy-dependent transporters. In Gram-negative bacteria, many of ...The capacity of numerous bacterial species to tolerate antibiotics and other toxic compounds arises in part from the activity of energy-dependent transporters. In Gram-negative bacteria, many of these transporters form multicomponent 'pumps' that span both inner and outer membranes and are driven energetically by a primary or secondary transporter component. A model system for such a pump is the acridine resistance complex of Escherichia coli. This pump assembly comprises the outer-membrane channel TolC, the secondary transporter AcrB located in the inner membrane, and the periplasmic AcrA, which bridges these two integral membrane proteins. The AcrAB-TolC efflux pump is able to transport vectorially a diverse array of compounds with little chemical similarity, thus conferring resistance to a broad spectrum of antibiotics. Homologous complexes are found in many Gram-negative species, including in animal and plant pathogens. Crystal structures are available for the individual components of the pump and have provided insights into substrate recognition, energy coupling and the transduction of conformational changes associated with the transport process. However, how the subunits are organized in the pump, their stoichiometry and the details of their interactions are not known. Here we present the pseudo-atomic structure of a complete multidrug efflux pump in complex with a modulatory protein partner from E. coli. The model defines the quaternary organization of the pump, identifies key domain interactions, and suggests a cooperative process for channel assembly and opening. These findings illuminate the basis for drug resistance in numerous pathogenic bacterial species.
解像度: 3.3→29.67 Å / Cor.coef. Fo:Fc: 0.87 / Cor.coef. Fo:Fc free: 0.832 / SU B: 31.407 / SU ML: 0.518 / 交差検証法: THROUGHOUT / ESU R Free: 0.59 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. U VALUES REFINED INDIVIDUALLY. PORTIONS OF ACRB AND DARPIN WERE DISORDERED AND WERE MODELLED STEREOCHEMICALLY. THE N AND C TERMINI OF ACRZ ...詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. U VALUES REFINED INDIVIDUALLY. PORTIONS OF ACRB AND DARPIN WERE DISORDERED AND WERE MODELLED STEREOCHEMICALLY. THE N AND C TERMINI OF ACRZ ARE NOT AS WELL ORGANISED AS THE CENTRAL REGION AND HAVE HIGHER B FACTORS.
Rfactor
反射数
%反射
Selection details
Rfree
0.322
1656
5 %
RANDOM
Rwork
0.28142
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obs
0.28343
31614
99.46 %
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溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK