Phospho-RSK1 p90 (S380) and Total RSK1 p90 ELISA Kit

Supplementary info

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

Activity summary

RSK1 also known as p90 ribosomal S6 kinase 1 or p90RSK is a serine/threonine kinase with an approximate mass of 90 kDa. It belongs to the family of proteins that integrate signals from various extracellular stimuli. This kinase is expressed in diverse tissues including brain lung liver and skeletal muscle. At the molecular level RSK1 phosphorylates various target proteins that are involved in regulating cellular growth and survival. Its activity is regulated by phosphorylation events that occur at specific sites such as Serine 238 (E238 in some literature) which are critical for its function.

Biological function summary

RSK1 plays a fundamental role in cell proliferation and differentiation in the context of the p90 protein weight. It is an important component of the mitogen-activated protein kinase (MAPK) signaling pathway and forms part of multi-protein complexes that facilitate its activation and function. RSK1 influences various biological processes by phosphorylating transcription factors histone proteins and other kinases thereby regulating gene expression and protein synthesis. These actions highlight its influence in maintaining cellular homeostasis.

Pathways

RSK1 p90 interacts significantly with the MAPK/ERK and PI3K/AKT pathways. It acts downstream of ERK where it receives activating signals that enable it to phosphorylate substrates within the cell. This role supports its interaction with proteins like Akt and mTOR which are critical mediators of cell growth signals. The interplay between these pathways enables cells to respond to growth factors and stress contributing to the regulation of development and metabolism.

Associated diseases and disorders

RSK1 is implicated in the progression of cancer and neurological disorders. In cancer abnormal RSK1 signaling can lead to unchecked cell growth and survival where it often interfaces with proteins such as C-RAF and BCL-2 to promote oncogenic pathways. In neurological disorders RSK1 influences pathways that regulate neuron survival and plasticity connecting it to proteins like CREB. Understanding RSK1's role in these conditions can provide insight into targeted therapies that may mitigate these diseases.