Max Planck Bristol Centre for Minimal Biology - University of Bristol
U100572-102
United Kingdom
Citation
Journal: Structure / Year: 2024 Title: Engineering the ADDobody protein scaffold for generation of high-avidity ADDomer super-binders. Authors: Dora Buzas / Huan Sun / Christine Toelzer / Sathish K N Yadav / Ufuk Borucu / Gunjan Gautam / Kapil Gupta / Joshua C Bufton / Julien Capin / Richard B Sessions / Frederic Garzoni / Imre ...Authors: Dora Buzas / Huan Sun / Christine Toelzer / Sathish K N Yadav / Ufuk Borucu / Gunjan Gautam / Kapil Gupta / Joshua C Bufton / Julien Capin / Richard B Sessions / Frederic Garzoni / Imre Berger / Christiane Schaffitzel / Abstract: Adenovirus-derived nanoparticles (ADDomer) comprise 60 copies of adenovirus penton base protein (PBP). ADDomer is thermostable, rendering the storage, transport, and deployment of ADDomer-based ...Adenovirus-derived nanoparticles (ADDomer) comprise 60 copies of adenovirus penton base protein (PBP). ADDomer is thermostable, rendering the storage, transport, and deployment of ADDomer-based therapeutics independent of a cold chain. To expand the scope of ADDomers for new applications, we engineered ADDobodies, representing PBP crown domain, genetically separated from PBP multimerization domain. We inserted heterologous sequences into hyper-variable loops, resulting in monomeric, thermostable ADDobodies expressed at high yields in Escherichia coli. The X-ray structure of an ADDobody prototype validated our design. ADDobodies can be used in ribosome display experiments to select a specific binder against a target, with an enrichment factor of ∼10-fold per round. ADDobodies can be re-converted into ADDomers by genetically reconnecting the selected ADDobody with the PBP multimerization domain from a different species, giving rise to a multivalent nanoparticle, called Chimera, confirmed by a 2.2 Å electron cryo-microscopy structure. Chimera comprises 60 binding sites, resulting in ultra-high, picomolar avidity to the target.
Mass: 35248.512 Da / Num. of mol.: 20 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Human adenovirus sp. Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
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Experimental details
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Experiment
Experiment
Method: X-RAY DIFFRACTION / Number of used crystals: 1
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Sample preparation
Crystal
Density Matthews: 3.22 Å3/Da / Density % sol: 61.82 %
Crystal grow
Temperature: 293 K / Method: vapor diffusion, sitting drop / pH: 5.5 / Details: 20 w/v % PEG 3350, 0.15 M citrate pH 5.5
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Data collection
Diffraction
Mean temperature: 100 K / Serial crystal experiment: N