Zebrafish Psmd4 Antibody / Psmd4a / Psmd4b / 26S proteasome non-ATPase regulatory subunit 4

In zebrafish, Psmd4 is the ortholog of the human PSMD4 gene, showing a high degree of sequence identity and functional conservation. Both the zebrafish and human proteins share the same basic structural motifs essential for proteasomal function, including interaction domains that allow for proper assembly and regulation of the proteasomal complex. Zebrafish Psmd4 may have isoforms resulting from alternative splicing events, although specific isoform variants may not be fully characterized. These isoforms could potentially exhibit tissue-specific expression or alternative regulatory roles, further contributing to the fine-tuned regulation of proteasomal activity. The functional diversity provided by these isoforms allows for specialized roles in different tissues or developmental stages, ensuring efficient protein degradation and homeostasis under varying conditions. The expression of Psmd4 in zebrafish is widespread, with notable expression in tissues that undergo rapid cell division or have high protein turnover, such as the brain, liver, and kidney. This expression profile highlights the critical role of Psmd4 in maintaining protein integrity, regulating cellular stress responses, and ensuring proper protein homeostasis, particularly in rapidly growing or dividing cells. Given the functional conservation between zebrafish and human Psmd4, zebrafish serves as an ideal model for studying the molecular mechanisms underlying proteasomal dysfunction in humans. In particular, PSMD4 mutations in humans are associated with certain diseases, including cancer and neurodegenerative disorders, where impaired proteasomal degradation leads to the accumulation of misfolded or damaged proteins. Zebrafish Psmd4 is a valuable tool for investigating proteasome-related diseases and for screening potential therapeutic agents that can modulate proteasomal activity.