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Open data
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Basic information
Entry | Database: PDB / ID: 7z1a | |||||||||
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Title | Nanobody H11 and F2 bound to RBD | |||||||||
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![]() | ANTIVIRAL PROTEIN / spike / nanobody / high affinity | |||||||||
Function / homology | ![]() Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell ...Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated endocytosis of virus by host cell / membrane fusion / Attachment and Entry / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / receptor ligand activity / host cell surface receptor binding / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / identical protein binding / membrane / plasma membrane Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() ![]() | |||||||||
![]() | Mikolajek, H. / Naismith, J.H. | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Correlation between the binding affinity and the conformational entropy of nanobody SARS-CoV-2 spike protein complexes. Authors: Halina Mikolajek / Miriam Weckener / Z Faidon Brotzakis / Jiandong Huo / Evmorfia V Dalietou / Audrey Le Bas / Pietro Sormanni / Peter J Harrison / Philip N Ward / Steven Truong / Lucile ...Authors: Halina Mikolajek / Miriam Weckener / Z Faidon Brotzakis / Jiandong Huo / Evmorfia V Dalietou / Audrey Le Bas / Pietro Sormanni / Peter J Harrison / Philip N Ward / Steven Truong / Lucile Moynie / Daniel K Clare / Maud Dumoux / Joshua Dormon / Chelsea Norman / Naveed Hussain / Vinod Vogirala / Raymond J Owens / Michele Vendruscolo / James H Naismith / ![]() ![]() Abstract: Camelid single-domain antibodies, also known as nanobodies, can be readily isolated from naïve libraries for specific targets but often bind too weakly to their targets to be immediately useful. ...Camelid single-domain antibodies, also known as nanobodies, can be readily isolated from naïve libraries for specific targets but often bind too weakly to their targets to be immediately useful. Laboratory-based genetic engineering methods to enhance their affinity, termed maturation, can deliver useful reagents for different areas of biology and potentially medicine. Using the receptor binding domain (RBD) of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike protein and a naïve library, we generated closely related nanobodies with micromolar to nanomolar binding affinities. By analyzing the structure-activity relationship using X-ray crystallography, cryoelectron microscopy, and biophysical methods, we observed that higher conformational entropy losses in the formation of the spike protein-nanobody complex are associated with tighter binding. To investigate this, we generated structural ensembles of the different complexes from electron microscopy maps and correlated the conformational fluctuations with binding affinity. This insight guided the engineering of a nanobody with improved affinity for the spike protein. | |||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 371.9 KB | Display | ![]() |
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PDB format | ![]() | 308.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 987.2 KB | Display | ![]() |
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Full document | ![]() | 1000.5 KB | Display | |
Data in XML | ![]() | 31.3 KB | Display | |
Data in CIF | ![]() | 43.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7z1bC ![]() 7z1cC ![]() 7z1dC ![]() 7z1eC ![]() 7z6vC ![]() 7z7xC ![]() 7z85C ![]() 7z86C ![]() 7z9qC ![]() 7z9rC ![]() 6zbpS S: Starting model for refinement C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Unit cell |
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Noncrystallographic symmetry (NCS) | NCS domain:
NCS domain segments: Component-ID: _ / Refine code: _
NCS ensembles :
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Components
#1: Protein | Mass: 23716.580 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Gene: S, 2 / Production host: ![]() #2: Antibody | Mass: 14833.442 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #3: Antibody | Mass: 14996.748 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #4: Sugar | #5: Water | ChemComp-HOH / | Has ligand of interest | Y | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 3.99 Å3/Da / Density % sol: 69.2 % |
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Crystal grow | Temperature: 293 K / Method: vapor diffusion, sitting drop Details: 0.1 M BICINE pH 8.5, 20% w/v Polyethylene glycol 10,000 |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: DECTRIS PILATUS 6M / Detector: PIXEL / Date: Sep 15, 2020 |
Radiation | Monochromator: M / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.9763 Å / Relative weight: 1 |
Reflection | Resolution: 2.59→59.16 Å / Num. obs: 54473 / % possible obs: 100 % / Redundancy: 13.6 % / CC1/2: 0.999 / Rmerge(I) obs: 0.125 / Net I/σ(I): 14.6 |
Reflection shell | Resolution: 2.59→2.66 Å / Num. unique obs: 3936 / CC1/2: 0.331 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: 6ZBP Resolution: 2.59→59.16 Å / Cor.coef. Fo:Fc: 0.951 / Cor.coef. Fo:Fc free: 0.944 / SU B: 28.4 / SU ML: 0.238 / Cross valid method: THROUGHOUT / ESU R: 0.303 / ESU R Free: 0.235 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.1 Å / Solvent model: MASK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 101 Å2
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Refinement step | Cycle: 1 / Resolution: 2.59→59.16 Å
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Refine LS restraints |
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