Zebrafish Psma5 Antibody / Proteasome subunit alpha type 5, 100 ug

Psma5 (Proteasome subunit alpha type 5) is a structural component of the 20S core particle of the proteasome, a key intracellular complex responsible for the ATP-independent degradation of ubiquitinated proteins. Psma5 belongs to the alpha subunit family, which forms the two outer rings of the proteasome core. These alpha subunits regulate substrate entry into the proteolytic chamber formed by the beta subunits and are essential for proteasome assembly, stability, and function.

In zebrafish, Psma5 is the ortholog of the human PSMA5 gene. The protein sequence and functional domains are highly conserved between zebrafish and humans, indicating a shared role in proteasome-mediated protein degradation. This evolutionary conservation supports the use of zebrafish as a model organism for studying proteostasis, developmental regulation, and disease mechanisms related to proteasome dysfunction.

Zebrafish Psma5 may have multiple isoforms generated through alternative splicing. These isoforms could allow tissue-specific or developmental stage-specific regulation of proteasome activity, although the canonical isoform is primarily involved in the assembly and function of the standard 20S proteasome.

During zebrafish embryogenesis, Psma5 is broadly expressed in rapidly proliferating and metabolically active tissues, including the developing brain, eye, musculature, and digestive organs. Its expression reflects the universal need for controlled protein degradation in processes such as cell cycle progression, signal transduction, and removal of damaged or misfolded proteins.

In human biology, defects in proteasome components including PSMA5 have been associated with neurodegenerative diseases, cancers, and immune system disorders. Zebrafish Psma5, due to its conserved function, serves as a valuable model for functional studies of the proteasome and for the development of therapeutics targeting the ubiquitin-proteasome system.