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- PDB-5fj7: Structure of the P2 polymerase inside in vitro assembled bacterio... -
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Open data
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Basic information
Entry | Database: PDB / ID: 5fj7 | ||||||
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Title | Structure of the P2 polymerase inside in vitro assembled bacteriophage phi6 polymerase complex, with P1 included | ||||||
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![]() | VIRAL PROTEIN / BACTERIOPHAGE PHI6 / POLYMERASE COMPLEX / P2 / POLYMERASE / P1 | ||||||
Function / homology | ![]() T=2 icosahedral viral capsid / RNA uridylyltransferase activity / viral inner capsid / virion component / viral nucleocapsid / RNA-directed RNA polymerase / viral RNA genome replication / RNA-dependent RNA polymerase activity / nucleotide binding / DNA-templated transcription ...T=2 icosahedral viral capsid / RNA uridylyltransferase activity / viral inner capsid / virion component / viral nucleocapsid / RNA-directed RNA polymerase / viral RNA genome replication / RNA-dependent RNA polymerase activity / nucleotide binding / DNA-templated transcription / RNA binding / identical protein binding / metal ion binding Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 7.9 Å | ||||||
![]() | Ilca, S. / Kotecha, A. / Sun, X. / Poranen, M.P. / Stuart, D.I. / Huiskonen, J.T. | ||||||
![]() | ![]() Title: Localized reconstruction of subunits from electron cryomicroscopy images of macromolecular complexes. Authors: Serban L Ilca / Abhay Kotecha / Xiaoyu Sun / Minna M Poranen / David I Stuart / Juha T Huiskonen / ![]() ![]() Abstract: Electron cryomicroscopy can yield near-atomic resolution structures of highly ordered macromolecular complexes. Often however some subunits bind in a flexible manner, have different symmetry from the ...Electron cryomicroscopy can yield near-atomic resolution structures of highly ordered macromolecular complexes. Often however some subunits bind in a flexible manner, have different symmetry from the rest of the complex, or are present in sub-stoichiometric amounts, limiting the attainable resolution. Here we report a general method for the localized three-dimensional reconstruction of such subunits. After determining the particle orientations, local areas corresponding to the subunits can be extracted and treated as single particles. We demonstrate the method using three examples including a flexible assembly and complexes harbouring subunits with either partial occupancy or mismatched symmetry. Most notably, the method allows accurate fitting of the monomeric RNA-dependent RNA polymerase bound at the threefold axis of symmetry inside a viral capsid, revealing for the first time its exact orientation and interactions with the capsid proteins. Localized reconstruction is expected to provide novel biological insights in a range of challenging biological systems. | ||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 407.3 KB | Display | ![]() |
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PDB format | ![]() | 332.3 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 3187MC ![]() 3183C ![]() 3184C ![]() 3185C ![]() 3186C ![]() 5fj5C ![]() 5fj6C C: citing same article ( M: map data used to model this data |
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Similar structure data | |
EM raw data | ![]() Data size: 8.1 Data #1: Extracted particle stacks of bacteriophage phi6 polymerase complex [picked particles - multiframe - processed]) |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 84163.672 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #2: Protein | | Mass: 74903.203 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #3: Chemical | ChemComp-MN / | |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: BACTERIOPHAGE PHI6 POLYMERASE COMPLEX ASSEMBLED IN VITRO Type: COMPLEX |
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Buffer solution | Name: 50 MM TRIS / pH: 8 / Details: 50 MM TRIS |
Specimen | Conc.: 2.4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: HOLEY CARBON |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE Details: VITRIFICATION 1 -- CRYOGEN- ETHANE, TEMPERATURE- 120, INSTRUMENT- FEI VITROBOT MARK IV, METHOD- BLOT 4 SECONDS BEFORE PLUNGING, |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Tecnai F30 / Image courtesy: FEI Company |
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Microscopy | Model: FEI TECNAI F30 / Date: Jun 12, 2014 / Details: DOSE RATE 6-8 E- PER PIX PER S |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 160000 X / Calibrated magnification: 37037 X / Nominal defocus max: 2600 nm / Nominal defocus min: 1100 nm / Cs: 2 mm |
Specimen holder | Temperature: 81 K |
Image recording | Electron dose: 0.16 e/Å2 / Film or detector model: GATAN K2 (4k x 4k) |
Image scans | Num. digital images: 834 |
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Processing
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CTF correction | Details: EACH PARTICLE | |||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | |||||||||||||||||||||
3D reconstruction | Method: LOCALIZED RECONSTRUCTION / Resolution: 7.9 Å / Num. of particles: 43216 / Nominal pixel size: 1.3 Å / Actual pixel size: 1.35 Å / Magnification calibration: ATOMIC MODEL Details: SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-3187. (DEPOSITION ID: 13864). Symmetry type: POINT | |||||||||||||||||||||
Atomic model building | Protocol: OTHER / Space: REAL / Target criteria: Cross-correlation coefficient Details: METHOD--LOCAL CORRELATION REFINEMENT PROTOCOL--X-RAY | |||||||||||||||||||||
Atomic model building |
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Refinement | Highest resolution: 7.9 Å | |||||||||||||||||||||
Refinement step | Cycle: LAST / Highest resolution: 7.9 Å
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