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- EMDB-6966: Structure of protein cage consisting of 24 eleven-membered ring p... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-6966 | |||||||||
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Title | Structure of protein cage consisting of 24 eleven-membered ring proteins induced by addition of gold nanoparticle (GNP) | |||||||||
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Function / homology | Transcription attenuation protein MtrB / Tryptophan RNA-binding attenuator protein domain / Tryptophan RNA-binding attenuator protein / Tryptophan RNA-binding attenuator protein-like domain superfamily / DNA-templated transcription termination / regulation of DNA-templated transcription / RNA binding / identical protein binding / Transcription attenuation protein MtrB![]() | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 5.9 Å | |||||||||
![]() | Malay AD / Miyazaki N / Biela A / Chakraborti S / Majsterkiewicz K / Kaplan CS / Hochberg GKA / Wu D / Wrobel TP / Benesch JLP ...Malay AD / Miyazaki N / Biela A / Chakraborti S / Majsterkiewicz K / Kaplan CS / Hochberg GKA / Wu D / Wrobel TP / Benesch JLP / Iwasaki K / Heddle JG / Kelemen P / Vavpetic P / Pelicon P | |||||||||
![]() | ![]() Title: An ultra-stable gold-coordinated protein cage displaying reversible assembly. Authors: Ali D Malay / Naoyuki Miyazaki / Artur Biela / Soumyananda Chakraborti / Karolina Majsterkiewicz / Izabela Stupka / Craig S Kaplan / Agnieszka Kowalczyk / Bernard M A G Piette / Georg K A ...Authors: Ali D Malay / Naoyuki Miyazaki / Artur Biela / Soumyananda Chakraborti / Karolina Majsterkiewicz / Izabela Stupka / Craig S Kaplan / Agnieszka Kowalczyk / Bernard M A G Piette / Georg K A Hochberg / Di Wu / Tomasz P Wrobel / Adam Fineberg / Manish S Kushwah / Mitja Kelemen / Primož Vavpetič / Primož Pelicon / Philipp Kukura / Justin L P Benesch / Kenji Iwasaki / Jonathan G Heddle / ![]() ![]() ![]() ![]() ![]() ![]() Abstract: Symmetrical protein cages have evolved to fulfil diverse roles in nature, including compartmentalization and cargo delivery, and have inspired synthetic biologists to create novel protein assemblies ...Symmetrical protein cages have evolved to fulfil diverse roles in nature, including compartmentalization and cargo delivery, and have inspired synthetic biologists to create novel protein assemblies via the precise manipulation of protein-protein interfaces. Despite the impressive array of protein cages produced in the laboratory, the design of inducible assemblies remains challenging. Here we demonstrate an ultra-stable artificial protein cage, the assembly and disassembly of which can be controlled by metal coordination at the protein-protein interfaces. The addition of a gold (I)-triphenylphosphine compound to a cysteine-substituted, 11-mer protein ring triggers supramolecular self-assembly, which generates monodisperse cage structures with masses greater than 2 MDa. The geometry of these structures is based on the Archimedean snub cube and is, to our knowledge, unprecedented. Cryo-electron microscopy confirms that the assemblies are held together by 120 S-Au-S staples between the protein oligomers, and exist in two chiral forms. The cage shows extreme chemical and thermal stability, yet it readily disassembles upon exposure to reducing agents. As well as gold, mercury(II) is also found to enable formation of the protein cage. This work establishes an approach for linking protein components into robust, higher-order structures, and expands the design space available for supramolecular assemblies to include previously unexplored geometries. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 38.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 11.8 KB 11.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 7.9 KB | Display | ![]() |
Images | ![]() | 70.5 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 78.9 KB | Display | ![]() |
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Full document | ![]() | 78 KB | Display | |
Data in XML | ![]() | 494 B | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 4443C ![]() 4444C ![]() 6rvvC ![]() 6rvwC ![]() 6962 C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.74 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Designed protein cage consisting of C11-symmetric TRAP proteins a...
Entire | Name: Designed protein cage consisting of C11-symmetric TRAP proteins assembled with gold nanoparticles |
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Components |
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-Supramolecule #1: Designed protein cage consisting of C11-symmetric TRAP proteins a...
Supramolecule | Name: Designed protein cage consisting of C11-symmetric TRAP proteins assembled with gold nanoparticles type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() |
Recombinant expression | Organism: ![]() ![]() |
Molecular weight | Experimental: 2.2 MDa |
-Macromolecule #1: Transcription attenuation protein MtrB
Macromolecule | Name: Transcription attenuation protein MtrB / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MYTNSDFVVI KALEDGVNV I GLTRGADT RF HHSECLD KGE VLIAQF TEHT SAIKV RGKAY IQTS HGVIES EGK K |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.89 mg/mL |
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Buffer | pH: 8 |
Grid | Model: Quantifoil R1.2/1.3 / Material: MOLYBDENUM / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Support film - Film thickness: 10.0 nm |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV / Details: 3.0 s blotting time. |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON II (4k x 4k) / Detector mode: INTEGRATING / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Average electron dose: 40.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |