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Open data
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Basic information
Entry | Database: PDB / ID: 7z1e | |||||||||
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Title | Nanobody H11-H4 Q98R H100E 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 / symbiont-mediated suppression of host innate immune response / 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 | ![]() | 147.9 KB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 7z1aC ![]() 7z1bC ![]() 7z1cC ![]() 7z1dC ![]() 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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Components on special symmetry positions |
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Components
-Protein / Antibody / Sugars , 3 types, 3 molecules EEEFFF![](data/chem/img/NAG.gif)
![](data/chem/img/NAG.gif)
#1: Protein | Mass: 23716.580 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Gene: S, 2 / Production host: ![]() |
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#2: Antibody | Mass: 15065.783 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#3: Sugar | ChemComp-NAG / |
-Non-polymers , 3 types, 211 molecules ![](data/chem/img/GOL.gif)
![](data/chem/img/NO3.gif)
![](data/chem/img/HOH.gif)
![](data/chem/img/NO3.gif)
![](data/chem/img/HOH.gif)
#4: Chemical | #5: Chemical | #6: Water | ChemComp-HOH / | |
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-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.89 Å3/Da / Density % sol: 57.43 % |
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Crystal grow | Temperature: 293 K / Method: vapor diffusion, sitting drop / Details: 0.2M Ammonium nitrate, 20 % Peg 3350 |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: DECTRIS EIGER2 XE 16M / Detector: PIXEL / Date: Jul 14, 2021 |
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: 1.59→67.761 Å / Num. obs: 61104 / % possible obs: 100 % / Redundancy: 18.8 % / CC1/2: 0.999 / Rmerge(I) obs: 0.046 / Net I/σ(I): 24.9 |
Reflection shell | Resolution: 1.59→1.62 Å / Redundancy: 20.2 % / Rmerge(I) obs: 4.156 / Mean I/σ(I) obs: 0.4 / Num. unique obs: 3027 / CC1/2: 0.361 / % possible all: 100 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: 6ZBP Resolution: 1.59→67.761 Å / Cor.coef. Fo:Fc: 0.976 / Cor.coef. Fo:Fc free: 0.967 / SU B: 4.816 / SU ML: 0.067 / Cross valid method: THROUGHOUT / ESU R: 0.077 / ESU R Free: 0.072 Details: Hydrogens have been added in their riding positions
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Solvent computation | Ion probe radii: 0.7 Å / Shrinkage radii: 0.7 Å / VDW probe radii: 1.2 Å / Solvent model: MASK BULK SOLVENT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 38.799 Å2
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Refinement step | Cycle: LAST / Resolution: 1.59→67.761 Å
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Refine LS restraints |
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LS refinement shell | Refine-ID: X-RAY DIFFRACTION / Total num. of bins used: 20
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