Recombinant Human PPP1R1A protein

Supplementary information

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

The protein phosphatase 1 regulatory inhibitor subunit 1A also known as PPP1R1A or inhibitor-1 (I-1) plays a significant role in cellular regulation as a phosphatase inhibitor. Mechanically it regulates the activity of protein phosphatase 1 (PP1) an essential enzyme in various cellular processes. Its molecular weight is approximately 19 kDa. PPP1R1A is expressed in many tissues showing notable levels in cardiac and skeletal muscle where it helps modulate responses to various stimuli.

Biological function summary

PPP1R1A modulates signaling pathways by influencing the dephosphorylation of substrates which is a critical step in signal transduction. It is not typically part of a complex but interacts closely with protein phosphatase 1. This interaction allows for the effective regulation of phosphorylation states within cells impacting cell cycle control muscle contraction glycogen metabolism and more. Its regulatory capabilities are important for maintaining cellular homeostasis.

Pathways

The regulatory activities of PPP1R1A significantly impact the cAMP signaling pathway and the regulation of glycogen metabolism. Within the cAMP pathway PPP1R1A regulates the activity of PP1 influencing processes like muscle contraction and gene expression. It interacts with proteins such as PKA which phosphorylates PPP1R1A activating its inhibitory function. This regulation affects downstream cellular activities by modulating phosphorylation levels of key substrates within these pathways.

Alterations in PPP1R1A expression or function have implications in cardiac diseases and diabetes. Increased or decreased activity of PPP1R1A can disrupt normal heart function due to its regulatory role in cardiac muscle contraction. Altered regulation within the cAMP and glycogen metabolism pathways can contribute to metabolic disorders like diabetes. Interactions with proteins such as PP1 and PKA are critical for these conditions highlighting PPP1R1A's role in disease progression and potential therapeutic targeting.