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- EMDB-5294: 3D reconstruction of frozen hydrated HIV-1 integrase dimer in com... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-5294 | |||||||||
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Title | 3D reconstruction of frozen hydrated HIV-1 integrase dimer in complex with two Fabs. | |||||||||
![]() | This is 3D reconstruction of frozen hydrated HIV-1 integrase dimer in complex with 2 Fabs. | |||||||||
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![]() | HIV-1 integrase dimer / Fab | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 9.6 Å | |||||||||
![]() | Wu S / Avila-Sakar A / Kim J / Booth DS / Greenberg CH / Rossi A / Liao M / Alian A / Griner SL / Juge N ...Wu S / Avila-Sakar A / Kim J / Booth DS / Greenberg CH / Rossi A / Liao M / Alian A / Griner SL / Juge N / Mergel CM / Chaparro-Riggers J / Strop P / Tampe R / Edwards RH / Stroud RM / Craik CS / Cheng Y | |||||||||
![]() | ![]() Title: Fabs enable single particle cryoEM studies of small proteins. Authors: Shenping Wu / Agustin Avila-Sakar / JungMin Kim / David S Booth / Charles H Greenberg / Andrea Rossi / Maofu Liao / Xueming Li / Akram Alian / Sarah L Griner / Narinobu Juge / Yadong Yu / ...Authors: Shenping Wu / Agustin Avila-Sakar / JungMin Kim / David S Booth / Charles H Greenberg / Andrea Rossi / Maofu Liao / Xueming Li / Akram Alian / Sarah L Griner / Narinobu Juge / Yadong Yu / Claudia M Mergel / Javier Chaparro-Riggers / Pavel Strop / Robert Tampé / Robert H Edwards / Robert M Stroud / Charles S Craik / Yifan Cheng / ![]() Abstract: In spite of its recent achievements, the technique of single particle electron cryomicroscopy (cryoEM) has not been widely used to study proteins smaller than 100 kDa, although it is a highly ...In spite of its recent achievements, the technique of single particle electron cryomicroscopy (cryoEM) has not been widely used to study proteins smaller than 100 kDa, although it is a highly desirable application of this technique. One fundamental limitation is that images of small proteins embedded in vitreous ice do not contain adequate features for accurate image alignment. We describe a general strategy to overcome this limitation by selecting a fragment antigen binding (Fab) to form a stable and rigid complex with a target protein, thus providing a defined feature for accurate image alignment. Using this approach, we determined a three-dimensional structure of an ∼65 kDa protein by single particle cryoEM. Because Fabs can be readily generated against a wide range of proteins by phage display, this approach is generally applicable to study many small proteins by single particle cryoEM. | |||||||||
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 | ![]() | 10.8 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 11.2 KB 11.2 KB | Display Display | ![]() |
Images | ![]() | 20.1 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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Links
EMDB pages | ![]() ![]() |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | This is 3D reconstruction of frozen hydrated HIV-1 integrase dimer in complex with 2 Fabs. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.8 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 : HIV-1 integrase - Fab complex
Entire | Name: HIV-1 integrase - Fab complex |
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Components |
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-Supramolecule #1000: HIV-1 integrase - Fab complex
Supramolecule | Name: HIV-1 integrase - Fab complex / type: sample / ID: 1000 / Oligomeric state: 2 Fabs bind to one integrase dimer / Number unique components: 2 |
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Molecular weight | Experimental: 160 KDa / Theoretical: 160 KDa |
-Macromolecule #1: integrase
Macromolecule | Name: integrase / type: protein_or_peptide / ID: 1 / Details: dimer, total molecular weight 65kDa / Number of copies: 2 / Oligomeric state: dimer / Recombinant expression: Yes |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Experimental: 32 KDa / Theoretical: 32 KDa |
Recombinant expression | Organism: ![]() ![]() |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Grid | Details: 200 mesh Quantifoil |
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Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 100 K / Instrument: OTHER / Details: Vitrification instrument: Vitrobot |
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Electron microscopy
Microscope | FEI TECNAI F20 |
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Date | Feb 1, 2011 |
Image recording | Category: CCD / Film or detector model: TVIPS TEMCAM-F816 (8k x 8k) / Average electron dose: 30 e/Å2 |
Tilt angle min | 0 |
Tilt angle max | 0 |
Electron beam | Acceleration voltage: 200 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.1 mm / Nominal defocus max: 5.0 µm / Nominal defocus min: 2.0 µm / Nominal magnification: 80000 |
Sample stage | Specimen holder: CT3500 / Specimen holder model: GATAN LIQUID NITROGEN |
Experimental equipment | ![]() Model: Tecnai F20 / Image courtesy: FEI Company |
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Image processing
CTF correction | Details: Each particle |
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Final reconstruction | Algorithm: OTHER / Resolution.type: BY AUTHOR / Resolution: 9.6 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: Frealign / Number images used: 14000 |
-Atomic model buiding 1
Initial model | PDB ID: |
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Software | Name: ![]() |
Details | Protocol: rigid body |
Refinement | Space: REAL / Protocol: RIGID BODY FIT |
-Atomic model buiding 2
Initial model | PDB ID: |
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Software | Name: ![]() |
Details | Protocol: rigid body |
Refinement | Space: REAL / Protocol: RIGID BODY FIT |