Erastin, ferroptosis activator

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

Interferon gamma (IFN-γ) GTPase HRAS VDAC2 and xCT represent significant proteins each with unique mechanical functions. IFN-γ a cytokine with a molecular weight of approximately 17 kDa is primarily expressed in activated T cells and natural killer cells. It is recognized as a critical mediator in immune response stimulating other immune cells. HRAS a small GTPase weighs about 21 kDa and plays an important role in signal transduction by cycling between inactive GDP-bound and active GTP-bound states. It is ubiquitously expressed in many tissues. VDAC2 with a molecular mass of around 32 kDa is part of the voltage-dependent anion channel family located in the outer mitochondrial membrane. Meanwhile xCT also known as the solute carrier family 7 member 11 (SLC7A11) is an important component of the system Xc- responsible for cystine-glutamate exchange primarily expressed in the brain kidney and placenta.

Biological function summary

The activities of these proteins contribute significantly to cellular processes and homeostasis. IFN-γ's main role involves modulation of the immune system by enhancing antigen presentation and promoting macrophage activation. HRAS is part of multiple protein complexes that dictate cellular proliferation and differentiation through its role in the MAPK and PI3K/AKT pathways. VDAC2 is essential for metabolite transport between the mitochondria and cytoplasm and its functions are tightly linked with mitochondrial apoptosis regulation. xCT's activity as part of a transporter complex helps maintain redox balance and prevent oxidative stress by importing cystine which can be converted to cysteine for glutathione biosynthesis an important antioxidant.

Pathways

These proteins contribute to distinct yet interconnected biological routes. IFN-γ is a critical player in the JAK-STAT signaling pathway which influences immune and inflammatory responses. HRAS’s involvement in the MAPK and PI3K/AKT pathways links it directly with cell growth and survival. VDAC2 plays an integral role in apoptosis pathways by interacting with apoptotic regulators like Bcl-2 family proteins thereby promoting or inhibiting cell death. xCT is a central part of the ferroptosis pathway due to its role in supplying cysteine for glutathione production and its activity is particularly relevant when discussing cell death linked to oxidative damage and ferroptosis markers.

These proteins are associated with various pathological conditions. IFN-γ has a significant connection with autoimmune and infectious diseases such as rheumatoid arthritis where its overexpression leads to excessive inflammation. HRAS on the other hand is well-known in oncology for its mutations that drive certain types of cancer including bladder cancer. VDAC2 by influencing apoptosis has implications in neurodegenerative diseases like Alzheimer’s commonly involving interactions with amyloid-beta. xCT is linked to cancer and neurodegeneration through its role in regulating ferroptosis; its interaction with proteins like GPX4 a known inhibitor of ferroptosis highlights its significance in controlling cell fate in disease contexts.