NRROS Protein, Human (sf9, His-Myc)

NRROS, a key regulator of transforming growth factor beta-1 (TGFB1), plays a crucial role in microglia function within the nervous system. Its specific requirement for microglial activity involves the activation of latent TGFB1 in macrophages and microglia, accomplished by forming disulfide bonds with the Latency-associated peptide (LAP), the regulatory chain of TGFB1. NRROS orchestrates integrin-dependent activation of TGFB1, leading to highly localized TGF-beta-1 activation with limited spread to neighboring microglia. This localized and selective activation mechanism suggests the precision of LRRC33/NRROS in modulating TGFB1 signaling. Moreover, NRROS indirectly participates in Toll-like receptor (TLR) signaling, inhibiting TLR-mediated NF-kappa-B activation and cytokine production, possibly as a consequence of its role in TGF-beta-1 signaling. NRROS interacts with TGFB1 through disulfide bonds with LAP and engages with TLR2, TLR3, TLR4, TLR9, and potentially other Toll-like receptors, further emphasizing its multifaceted involvement in immune regulation. Additionally, NRROS directly interacts with CYBB/NOX2, highlighting its diverse functional associations.