RESEARCH: CANCER
FOLDING PROJECT #16471 PROFILE

This project investigates how cancer drugs work by studying RIPK2, a protein involved in cancer growth. Researchers are simulating RIPK2 with different drugs to understand how these drugs prevent RIPK2 from interacting with another protein called XIAP, which is crucial for cancer cell survival. This knowledge could help develop better cancer therapies.

Kinases are a major target for a variety of cancer therapies, but their mechanism of action is relatively unknown at a detailed atomic level, preventing us from understanding and optimizing known inhibitors.

One example is the Serine/Threonine Kinase RIPK2.

RIPK2 inhibition is useful for cancer targeting as it prevents RIPK2 from binding a protein partner named XIAP.

In fact, there are already 3 known inhibitors that bind to RIPK2 and prevent RIPK2-XIAP binding! However, it remains difficult to optimize these ligands for clinical purposes because we do not understand how any of these three inhibitors actually act on RIPK2 to prevent XIAP binding behavior.

These four projects are simulating RIPK2 by itself and bound to each of the three inhibitors, with the hope that this will reveal a more detailed mechanism of how each inhibitor works to prevent XIAP binding.

As a bonus, this will help reveal how RIPK2 *binds* XIAP (also unknown)! In this set of projects we are studying the following systems: 16466 – RIPK2 16467 – RIPK2:CSLP43 inhibitor-bound complex 16468 – RIPK2:CSLP48 inhibitor-bound complex 16469 – RIPK2:GSK583 inhibitor-bound complex 16470 – RIPK2:WEHI-345 inhibitor-bound complex 16471 – RIPK2:BI inhibitor-bound complex.

Kinases

Enzymes that add phosphate groups to proteins.

Kinases are enzymes that play a crucial role in regulating various cellular processes by attaching phosphate groups to proteins. This process, known as phosphorylation, can activate or deactivate proteins, influencing their function and signaling pathways. Kinases are involved in numerous biological activities, including cell growth, differentiation, metabolism, and apoptosis.

RIPK2

Receptor-interacting protein kinase 2

RIPK2 is a protein that acts as a key signaling molecule in the immune system. It plays a vital role in inflammatory responses and cell death pathways. RIPK2 activation triggers downstream signaling cascades that ultimately lead to the production of cytokines, inflammatory mediators that recruit immune cells to sites of infection or injury.

XIAP

X-linked inhibitor of apoptosis protein

XIAP is a protein that inhibits programmed cell death (apoptosis). It binds to and blocks caspases, enzymes responsible for carrying out the apoptotic process. XIAP plays a critical role in regulating cellular survival and immune responses.

Inhibitors

Substances that block the activity of a specific molecule or pathway.

Inhibitors are molecules that can bind to and prevent the function of target proteins or enzymes. They are widely used in medicine as drugs to treat various diseases by inhibiting the activity of disease-causing molecules.

Ligands

Molecules that bind to a specific receptor or target site.

Ligands are molecules that can bind to receptors on cells or other targets. This binding often triggers a specific biological response. Ligands play crucial roles in various cellular processes, including signaling, metabolism, and immune responses.