Tag: E3 ubiquitin ligase

COP1 and phytochrome signaling connect red and far-red light perception with protein degradation, PIF regulation, HY5 stability, and photomorphogenesis.

COP1 and HY5 form a central regulatory module in plant photomorphogenesis. Discover how COP1-dependent ubiquitination controls HY5 stability and light-responsive gene expression.

The COP1-SPA complex is a central regulator of plant photomorphogenesis, integrating light signals from phytochromes, cryptochromes and UVR8 with selective protein degradation.

COP1 substrate recognition is a key mechanism controlling selective protein degradation. Explore the COP1 WD40 domain, VP motifs, HY5, COP1-SPA complexes, ubiquitination, and proteasomal degradation.

COP1 is a conserved RING-type E3 ubiquitin ligase that controls protein stability through selective substrate recognition and ubiquitination. Learn how its RING, coiled-coil, and WD40 domains coordinate protein degradation and cellular signaling.

COP1 is a highly conserved E3 ubiquitin ligase found across diverse eukaryotic organisms. Its conserved domains support ubiquitination, substrate recognition, protein turnover, and regulation of developmental and cellular signaling pathways.

HY5 is a central transcription factor in Arabidopsis photomorphogenesis. Discover how COP1/SPA regulates HY5 stability and how HY5 controls light-responsive gene expression, plant development, and photosynthetic responses.

RING E3 ligases selectively recognize protein substrates through degrons, adaptor proteins, post-translational modifications, localization, and structural interactions that control ubiquitination.

The RING finger domain is an important zinc-binding protein domain involved in ubiquitination, cellular signaling, DNA repair, protein degradation, and disease. Explore its structure, functions, and biological significance.

Protein degradation is a vital cellular process that removes damaged or unnecessary proteins to maintain homeostasis. This article explains the ubiquitin–proteasome system, autophagy, and their roles in cellular regulation and disease.

E3 ubiquitin ligases are key regulators of protein ubiquitination and cellular protein homeostasis. They provide substrate specificity within the ubiquitin system and regulate protein degradation, cell-cycle progression, DNA repair, immune signalling, apoptosis, and other essential cellular processes.