Related Experiment Video
Updated: Jun 30, 2025
10:58
Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
Published on: July 25, 2013
17.0K
A suite of designed protein cages using machine learning and protein fragment-based protocols
Kyle Meador1, Roger Castells-Graells2, Roman Aguirre1
1Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA.
Structure (London, England : 1993)
|March 21, 2024
Summary
We computationally designed novel self-assembling protein cages for biotechnology and medicine. ProteinMPNN and fragment-based design enabled successful creation of these advanced protein nanoparticles.
Area of Science:
- Biotechnology
- Protein Engineering
- Computational Biology
Background:
- Protein cages offer significant potential in biotechnology and medicine.
- The de novo design and creation of these complex structures remain a significant challenge.
Purpose of the Study:
- To computationally design novel tetrahedrally symmetric, self-assembling protein cages.
- To compare different computational approaches for interface design and sequence generation.
- To provide insights for improving protein cage design methodologies.
Main Methods:
- Utilized a protein fragment-based approach for generating docked conformations.
- Employed and compared knowledge-based and machine learning protocols, specifically ProteinMPNN, for de novo interface sequence design.
- Analyzed design outcomes to identify key features for successful interface design.
Main Results:
- Successfully designed and structurally characterized seven protein cages and two intermediate assemblies using computational methods.
- Achieved high-resolution structures up to 2.0 Å via cryo-electron microscopy (cryo-EM).
- Demonstrated increased experimental success using the ProteinMPNN protocol for sequence design.
Conclusions:
- The developed computational strategies, particularly ProteinMPNN and fragment-based design, significantly advance the creation of protein cages.
- The designed protein cages expand the library of available protein nanoparticles.
- Insights gained will refine future protein interface design protocols for self-assembling nanomaterials.
Related Concept Videos
02:04Protein-protein Interfaces
12.5K
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
12.5K
01:24Protein Organization
6.5K
Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence....
The primary structure of a protein is its amino acid sequence....
6.5K
01:49Conserved Binding Sites
4.2K
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
4.2K
02:26Protein Networks
3.9K
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
3.9K