RPS6KA5

RPS6KA5

RPS6KA5, also known as Ribosomal Protein S6 Kinase A5, is a protein-coding gene that plays a crucial role in various cellular processes. It is a member of the ribosomal S6 kinase (RSK) family, which is involved in the regulation of cell growth, proliferation, and survival.

Gene and Protein Structure

The RPS6KA5 gene is located on chromosome Xq21.1 and consists of 23 exons. It encodes a protein of 740 amino acids, with a molecular weight of approximately 85 kDa. The protein contains several functional domains, including a kinase domain, a C-terminal kinase-associated domain, and multiple phosphorylation sites.

Function

RPS6KA5 is primarily involved in intracellular signaling pathways. It acts as a downstream effector of the mitogen-activated protein kinase (MAPK) signaling cascade, which regulates various cellular processes such as cell growth, differentiation, and survival. RPS6KA5 is activated by phosphorylation, which allows it to phosphorylate downstream targets, including transcription factors and other kinases.

Role in Disease

Mutations in the RPS6KA5 gene have been associated with Coffin-Lowry syndrome (CLS), a rare X-linked genetic disorder characterized by intellectual disability, facial dysmorphism, and skeletal abnormalities. These mutations lead to the loss of RPS6KA5 function, impairing its ability to regulate cellular processes properly.

Clinical Significance

Understanding the role of RPS6KA5 in disease has important clinical implications. It provides insights into the molecular mechanisms underlying Coffin-Lowry syndrome and may contribute to the development of targeted therapies in the future. Additionally, RPS6KA5 and other members of the RSK family have been implicated in various cancers, suggesting their potential as therapeutic targets in cancer treatment.

See Also

• Ribosomal Protein S6 Kinase
• Mitogen-Activated Protein Kinase
• Coffin-Lowry Syndrome

External Links

• RPS6KA5 on NCBI Gene
• OMIM Entry for Coffin-Lowry Syndrome