Anti-Calcineurin B/PPP3R1 antibody

Supplementary info

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

Activity summary

Calcineurin B also known as PPP3R1 serves as the regulatory subunit of the calcineurin phosphatase complex. The protein possesses a molecular mass of roughly 19 kDa. It expresses widely in various tissues especially in the brain skeletal muscle and immune cells. Calcineurin B partners with the catalytic subunit Calcineurin A to form the complete enzyme necessary for its dephosphorylation activity.

Biological function summary

Calcineurin B plays an important role in regulating calcium signaling pathways. It functions as part of a heterodimeric complex where it binds calcium ions and is necessary for activating the serine/threonine phosphatase activity of calcineurin. Through this activity calcineurin B influences the transcriptional activation of NFAT (Nuclear Factor of Activated T-cells) and other downstream signaling pathways affecting cell growth differentiation and immune responses.

Pathways

Calcineurin B acts critically in the calcium/calmodulin-dependent signaling pathway and the T-cell receptor signaling pathway. In these pathways it regulates the activity of proteins like NFAT and influences downstream effects essential for immune responses. The dephosphorylation activity facilitated by calcineurin B also connects it with a network of signaling cascades modulating calcium levels impacting cellular activities significantly.

Associated diseases and disorders

Calcineurin B is associated with immunosuppressive outcomes and neurodegenerative conditions. Its connection with NFAT makes it a target for immune-related disorders such as autoimmune diseases and transplant rejection. Additionally alterations in its activity connect with proteins like tau contributing to disorders like Alzheimer's disease due to dysregulated calcium signaling and neuronal damage.