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Open data
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Basic information
Entry | ![]() | |||||||||
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Title | BceAB nucleotide-free conformation | |||||||||
![]() | CryoEM map of BceAB in a nucleotide-free conformation filtered to 3.8A with -180 b-factor | |||||||||
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![]() | BceAB / ![]() ![]() ![]() | |||||||||
Function / homology | ![]() transmembrane transporter activity / transmembrane transport / response to antibiotic / ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | George NL / Orlando BJ | |||||||||
Funding support | 1 items
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![]() | ![]() Title: Conformational snapshots of the bacitracin sensing and resistance transporter BceAB. Authors: Natasha L George / Anthony L Schilmiller / Benjamin J Orlando / ![]() Abstract: SignificanceMany gram-positive organisms have evolved an elegant solution to sense and resist antimicrobial peptides that inhibit cell-wall synthesis. These organisms express an unusual "Bce-type" ...SignificanceMany gram-positive organisms have evolved an elegant solution to sense and resist antimicrobial peptides that inhibit cell-wall synthesis. These organisms express an unusual "Bce-type" adenosine triphosphate-binding cassette (ABC) transporter that recognizes complexes formed between antimicrobial peptides and lipids involved in cell-wall biosynthesis. In this work, we provide the first structural snapshots of a Bce-type ABC transporter trapped in different conformational states. Our structures and associated biochemical data provide key insights into the novel target protection mechanism that these unusual ABC transporters use to sense and resist antimicrobial peptides. The studies described herein set the stage to begin developing a comprehensive molecular understanding of the diverse interactions between antimicrobial peptides and conserved resistance machinery found across most gram-positive organisms. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 95.6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 18.8 KB 18.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 13.8 KB | Display | ![]() |
Images | ![]() | 28.6 KB | ||
Filedesc metadata | ![]() | 6.3 KB | ||
Others | ![]() ![]() | 95.5 MB 95.5 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7tcgMC ![]() 7tchC C: citing same article ( M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||
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Annotation | CryoEM map of BceAB in a nucleotide-free conformation filtered to 3.8A with -180 b-factor | ||||||||||||||||||||
Voxel size | X=Y=Z: 0.872 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: half-map A
File | emd_25811_half_map_1.map | ||||||||||||
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Annotation | half-map A | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: half-map B
File | emd_25811_half_map_2.map | ||||||||||||
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Annotation | half-map B | ||||||||||||
Projections & Slices |
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Density Histograms |
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Sample components
-Entire : BceAB
Entire | Name: BceAB |
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Components |
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-Supramolecule #1: BceAB
Supramolecule | Name: BceAB / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2 |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 129 KDa |
-Macromolecule #1: Bacitracin export permease protein BceB
Macromolecule | Name: Bacitracin export permease protein BceB / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() ![]() Strain: 168 |
Molecular weight | Theoretical: 72.262109 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: MNINQLILRN LKKNLRNYYL YVFALIFSVA LYFAFVTLQY DPAINEVKAS IKGAAAIKTA SILLVAVVAI FILYANTIFI KRRSKEIGL FQLIGMTKHK IFRILSAENV MLYFGSLAIG VAAGFSISKL VLMILFKIVD VKADAKLHFS EQALVQTVIV F CGIYLLIM ...String: MNINQLILRN LKKNLRNYYL YVFALIFSVA LYFAFVTLQY DPAINEVKAS IKGAAAIKTA SILLVAVVAI FILYANTIFI KRRSKEIGL FQLIGMTKHK IFRILSAENV MLYFGSLAIG VAAGFSISKL VLMILFKIVD VKADAKLHFS EQALVQTVIV F CGIYLLIM IMNYTFIKKQ SILSLFKVTS STEDKVKKIS FFQMLIGALG IVLILTGYYV SSELFGGKFK TINELFVAMS FI LGSVIIG TFLFYKGSVT FISNIIRKSK GGYLNISEVL SLSSIMFRMK SNALLLTIIT TVSALAIGLL SLAYISYYSS EKT AEQNVA ADFSFMNEKD AKLFENKLRE SNISFVKKAT PVLQANVDIA NIMDGTPKEM QGDPGNMQLA VVSDKDVKGV DVAA GEAVF SGYTDLLQKI MVFKDSGVIK VKSKHETQPL KYKGLREEFL VSYTFTSGGM PAVIVDDSLF KQLDKDKDPR IQLAQ STFI GVNVKHDDQM EKANELFQQV NKKNEHLSRL DTSAAQKSLF GMVMFIVGFL GLTFLITSGC ILYFKQMGES EDEKPS YTI LRKLGFTQGD LIKGIRIKQM YNFGIPLVVG LFHSYFAVQS GWFLFGSEVW APMIMVMVLY TALYSIFGFL SVLYYKK VI KSSL UniProtKB: Bacitracin export permease protein BceB |
-Macromolecule #2: Bacitracin export ATP-binding protein BceA
Macromolecule | Name: Bacitracin export ATP-binding protein BceA / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() ![]() Strain: 168 |
Molecular weight | Theoretical: 29.248377 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: MSGHHHHHHV ILEANKIRKS YGNKLNKQEV LKGIDIHIEK GEFVSIMGAS GSGKTTLLNV LSSIDQVSHG TIHINGNDMT AMKEKQLAE FRKQHLGFIF QDYNLLDTLT VKENILLPLS ITKLSKKEAN RKFEEVAKEL GIYELRDKYP NEISGGQKQR T SAGRAFIH ...String: MSGHHHHHHV ILEANKIRKS YGNKLNKQEV LKGIDIHIEK GEFVSIMGAS GSGKTTLLNV LSSIDQVSHG TIHINGNDMT AMKEKQLAE FRKQHLGFIF QDYNLLDTLT VKENILLPLS ITKLSKKEAN RKFEEVAKEL GIYELRDKYP NEISGGQKQR T SAGRAFIH DPSIIFADEP TGALDSKSAS DLLNKLSQLN QKRNATIIMV THDPVAASYC GRVIFIKDGQ MYTQLNKGGQ DR QTFFQDI MKTQGVLGGV QHEH UniProtKB: Bacitracin export ATP-binding protein BceA |
-Macromolecule #3: 4-amino-4-deoxy-1-O-[(S)-hydroxy{[(2E,6E,10Z,14Z,18Z,22E,26E,30E)...
Macromolecule | Name: 4-amino-4-deoxy-1-O-[(S)-hydroxy{[(2E,6E,10Z,14Z,18Z,22E,26E,30E)-3,7,11,15,19,23,27,31,35-nonamethylhexatriaconta-2,6,10,14,18,22,26,30,34-nonaen-1-yl]oxy}phosphoryl]-alpha-L-arabinopyranose type: ligand / ID: 3 / Number of copies: 1 / Formula: I0O |
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Molecular weight | Theoretical: 842.178 Da |
Chemical component information | ![]() ChemComp-I0O: |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Concentration | 7 mg/mL | ||||||||||||
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Buffer | pH: 8 Component:
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Grid | Model: Quantifoil R2/2 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 45 sec. / Pretreatment - Atmosphere: AIR / Details: 15mA in Pelco EasyGlow | ||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.1 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Specialist optics | Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 60.5 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Space: REAL |
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Output model | ![]() PDB-7tcg: |