RESEARCH: INFLUENZA
FOLDING PROJECT #12438 PROFILE

This project looks at miniproteins designed to fight the flu. These miniproteins bind to a part of the flu virus called hemagglutinin, which helps the virus infect cells. Researchers want to understand how these miniproteins work so they can design even better ones in the future using computer simulations.

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 engineered for specific functions.

Miniproteins are artificially created proteins that are significantly smaller than traditional antibodies. They possess unique properties that make them valuable tools in medicine and research. Their compact size allows for efficient delivery and targeting of specific sites within the body, making them promising candidates for treating diseases.

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therapeutics

Substances used to treat or prevent diseases.

Therapeutics encompass a wide range of medical treatments aimed at combating diseases and promoting well-being. They include medications, biological therapies, and other interventions designed to alleviate symptoms, cure illnesses, or prevent their onset.

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infectious disease

A disease caused by a pathogen such as bacteria, virus, or parasite.

Infectious diseases are illnesses transmitted from one person to another or through contact with contaminated objects. They are primarily caused by microorganisms like bacteria, viruses, fungi, and parasites. Symptoms vary widely depending on the specific pathogen involved.

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hemagglutinin

A viral protein that allows attachment to host cells.

Hemagglutinin is a key protein found on the surface of influenza viruses. It plays a crucial role in enabling the virus to attach to and infect host cells. By binding to specific receptors on cell surfaces, hemagglutinin facilitates viral entry and subsequent replication.

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influenza A

A type of influenza virus that can cause seasonal flu.

Influenza A is a highly contagious respiratory virus responsible for seasonal flu outbreaks worldwide. It infects the respiratory tract, causing symptoms such as fever, cough, sore throat, and body aches.

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HA

Hemagglutinin

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affinity maturation

The process of increasing the binding affinity of an antibody.

Affinity maturation is a crucial process in the development of highly effective antibodies. It involves introducing genetic changes that enhance the ability of an antibody to bind to its target with greater strength and specificity.

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molecular dynamics simulations

Computer simulations that model the movement of molecules over time.

Molecular dynamics simulations are powerful tools used to study the behavior of molecules at an atomic level. By simulating the interactions between atoms and molecules, researchers can gain insights into their structure, function, and dynamics.

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enhanced sampling methods

Techniques used to overcome limitations in traditional molecular dynamics simulations.

Enhanced sampling methods are essential for exploring a wider range of possible conformations and events in molecular simulations. They allow researchers to capture rare or transient phenomena that would otherwise be difficult to observe.