PIK3R1 is a gene that encodes a protein known as the p85α regulatory subunit of phosphoinositide 3-kinase (PI3K). This protein plays a crucial role in cellular signaling pathways that regulate various functions, including cell growth, proliferation, and survival. Mutations in the PIK3R1 gene can lead to various health issues, including certain types of cancer and genetic disorders. Understanding the function of PIK3R1 is important for developing targeted therapies and improving treatment strategies for diseases associated with its dysfunction.