ELI5: Explain Like I'm 5

Homology modeling

Have you ever played with Legos? Homology modeling is like building something with Legos, but instead of using colorful plastic pieces, scientists use a computer to build a 3D structure of a protein using smaller puzzle pieces.

Proteins are made up of long chains of tiny molecules called amino acids. Just like Legos, these amino acids can be arranged in different shapes to create different proteins. Homology modeling helps scientists figure out what a protein might look like based on its amino acid sequence, by comparing it to other proteins with similar sequences that have already been studied.

So, let's say we want to figure out what the protein that causes COVID-19 looks like. We can't see it with our eyes, so scientists use fancy machines to study its amino acid sequence. They can then compare this sequence to similar sequences from other viruses we already know a lot about, like the flu. Using this information, they can computationally build a model of what the COVID-19 protein might look like based on its similar sequences.

Just like building with Legos, scientists have to make sure certain pieces fit together correctly to create the right shape for the protein. They use fancy computer programs to help them figure out which pieces go where to create the most accurate model possible.

By creating these models, scientists can better understand how proteins work and how they might be able to create treatments or vaccines to stop them from causing diseases.