RESEARCH: INFLUENZA
FOLDING PROJECT #12457 PROFILE

Miniproteins are being designed to fight flu by blocking a key viral protein called hemagglutinin. Scientists want to understand how these miniproteins work so they can design even better ones. They'll use computer simulations to track how the miniproteins attach to and detach from hemagglutinin, giving us a complete picture of how this important interaction works.

Note: This TLDR is a simplication and may not be 100% accurate.

Designed miniprotein therapeutics occupy the middle ground between small molecule drugs and monoclonal antibody treatments for infectious disease.

Hemagglutinin is a viral fusion protein that allows H1 influenza A (HA) to bind sialic acid on cell surfaces, as well as being involved in the post-endocytosis mechanism of cellular infection.; The Baker lab at University of Washington has developed de novo designed miniproteins that bind hemagglutinin, and developed ways to improve their binding through affinity maturation.

Many of the mutations seen in affinity-matured sequences are not directly in the binding interface, and it is unclear how these changes lead to higher affinity.

Understanding this mechanism may help us better computationally design better binders.

We aim to use molecular dynamics simulations to examine ab initio binding pathways for these miniprotein binders, and use enhanced sampling methods to study the unbinding reaction.

Pairing these methods together will provide a robust description of the complete binding reaction for this system.

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miniprotein

A small protein designed for therapeutic purposes.

Miniproteins are artificially created proteins that are smaller than typical antibodies but larger than small-molecule drugs. They offer a unique approach to treating diseases by targeting specific molecules in the body.

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therapeutics

Medicinal substances used to treat or prevent diseases.

Therapeutics encompass a wide range of medications, from small-molecule drugs to complex biologics like antibodies. They are designed to target specific biological pathways and mechanisms involved in disease.

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hemagglutinin

A viral protein that binds to sialic acid on host cells, facilitating viral entry.

Hemagglutinin is a key protein found on the surface of influenza viruses. It plays a crucial role in allowing the virus to attach to and infect human cells.

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influenza A

A type of influenza virus that can cause seasonal epidemics and pandemics.

Influenza A is a highly contagious respiratory virus responsible for causing the flu. It spreads easily through droplets released when infected individuals cough or sneeze.

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HA

Hemagglutinin

HA is a common abbreviation for hemagglutinin, a protein found on the surface of influenza viruses.

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binding interface

The region on a protein where it interacts with another molecule.

The binding interface refers to the specific part of a protein that comes into contact with another molecule, such as a drug target or another protein. This interaction is crucial for many biological processes.

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molecular dynamics simulations

Computer models used to simulate the movement and interactions of atoms and molecules over time.

Molecular dynamics simulations are powerful tools used in computational biology to study the behavior of molecules. They allow researchers to visualize how proteins fold, interact with other molecules, and change shape over time.

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enhanced sampling methods

Techniques used in simulations to explore a wider range of possible molecular conformations.

Enhanced sampling methods are essential for overcoming limitations in traditional molecular dynamics simulations. They allow researchers to explore rare events and uncover hidden details about molecular behavior.