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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-22758 | |||||||||
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Title | Aldolase, rabbit muscle (beam-tilt refinement x4)![]() | |||||||||
![]() | Aldolase, rabbit muscle (beam-tilt refinement x4)![]() | |||||||||
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Function / homology | ![]() negative regulation of Arp2/3 complex-mediated actin nucleation / ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Kearns SK / Cash JN | |||||||||
Funding support | 2 items
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![]() | ![]() Title: High-resolution cryo-EM using beam-image shift at 200 keV. Authors: Jennifer N Cash / Sarah Kearns / Yilai Li / Michael A Cianfrocco / ![]() Abstract: Recent advances in single-particle cryo-electron microscopy (cryo-EM) data collection utilize beam-image shift to improve throughput. Despite implementation on 300 keV cryo-EM instruments, it ...Recent advances in single-particle cryo-electron microscopy (cryo-EM) data collection utilize beam-image shift to improve throughput. Despite implementation on 300 keV cryo-EM instruments, it remains unknown how well beam-image-shift data collection affects data quality on 200 keV instruments and the extent to which aberrations can be computationally corrected. To test this, a cryo-EM data set for aldolase was collected at 200 keV using beam-image shift and analyzed. This analysis shows that the instrument beam tilt and particle motion initially limited the resolution to 4.9 Å. After particle polishing and iterative rounds of aberration correction in , a 2.8 Å resolution structure could be obtained. This analysis demonstrates that software correction of microscope aberrations can provide a significant improvement in resolution at 200 keV. | |||||||||
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 | ![]() | 96.3 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 11.2 KB 11.2 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 10.7 KB | Display | ![]() |
Images | ![]() | 89.6 KB | ||
Filedesc metadata | ![]() | 5.4 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7ka4MC ![]() 7k9lC ![]() 7k9xC ![]() 7ka2C ![]() 7ka3C M: atomic model generated by this map C: citing same article ( |
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Similar structure data | |
EM raw data | ![]() Data size: 87.6 Data #1: Unaligned micrographs of aldolase collected with beam-tilt at 200 kV [micrographs - single frame]) |
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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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Annotation | Aldolase, rabbit muscle (beam-tilt refinement x4) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.91 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 : Homotetramer of aldolase
Entire | Name: Homotetramer of aldolase |
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Components |
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-Supramolecule #1: Homotetramer of aldolase
Supramolecule | Name: Homotetramer of aldolase / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 157 kDa/nm |
-Macromolecule #1: Fructose-bisphosphate aldolase A
Macromolecule | Name: Fructose-bisphosphate aldolase A / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO / EC number: ![]() |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 39.263672 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
Sequence | String: PHSHPALTPE QKKELSDIAH RIVAPGKGIL AADESTGSIA KRLQSIGTEN TEENRRFYRQ LLLTADDRVN PCIGGVILFH ETLYQKADD GRPFPQVIKS KGGVVGIKVD KGVVPLAGTN GETTTQGLDG LSERCAQYKK DGADFAKWRC VLKIGEHTPS A LAIMENAN ...String: PHSHPALTPE QKKELSDIAH RIVAPGKGIL AADESTGSIA KRLQSIGTEN TEENRRFYRQ LLLTADDRVN PCIGGVILFH ETLYQKADD GRPFPQVIKS KGGVVGIKVD KGVVPLAGTN GETTTQGLDG LSERCAQYKK DGADFAKWRC VLKIGEHTPS A LAIMENAN VLARYASICQ QNGIVPIVEP EILPDGDHDL KRCQYVTEKV LAAVYKALSD HHIYLEGTLL KPNMVTPGHA CT QKYSHEE IAMATVTALR RTVPPAVTGV TFLSGGQSEE EASINLNAIN KCPLLKPWAL TFSYGRALQA SALKAWGGKK ENL KAAQEE YVKRALANSL ACQGKYTPSG QAGAAASESL FISNHAY UniProtKB: Fructose-bisphosphate aldolase A |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Concentration | 1.6 mg/mL | ||||||
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Buffer | pH: 7.5 Component:
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Vitrification | Cryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV | ||||||
Details | Pure aldolase isolated from rabbit muscle was purchased as a lyophilized powder (Sigma Aldrich) and solubilized in 20 mM HEPES (pH 7.5), 50 mM NaCl at 1.6 mg/ml. Sample was blotted for 4 seconds with Whatman No. #1 filter paper immediately prior to plunge freezing in liquid ethane cooled by liquid nitrogen. |
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Electron microscopy
Microscope | FEI TALOS ARCTICA |
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Electron beam | Acceleration voltage: 200 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 100.0 µm / Calibrated magnification: 4500 / Illumination mode: OTHER / Imaging mode: BRIGHT FIELD![]() |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 42.0 e/Å2 |
Experimental equipment | ![]() Model: Talos Arctica / Image courtesy: FEI Company |