Zebrafish Psma3 Antibody / Proteasome subunit alpha type 3

In zebrafish, Psma3 is an ortholog of the human PSMA3 gene. The zebrafish and human proteins are highly conserved in both sequence and structure, especially in domains critical for proteasome assembly and function. This conservation supports the use of zebrafish as a reliable model for studying proteasome dynamics, protein turnover, and diseases related to impaired proteostasis. Zebrafish Psma3 may exist in multiple isoforms generated through alternative splicing. These isoforms can differ in their regulatory elements, cellular localization, or tissue-specific expression patterns, although the predominant isoform is typically involved in the canonical function of proteasome assembly and protein degradation. During zebrafish embryogenesis, Psma3 is broadly expressed across many tissue types, reflecting the fundamental role of the proteasome in maintaining cellular protein quality. Expression is particularly high in metabolically active tissues such as the developing brain, eye, liver, and somites. The protein is essential for embryonic growth, tissue morphogenesis, and cellular stress responses. In human systems, dysfunction of PSMA3 or related proteasome components has been linked to disorders such as cancer, neurodegeneration, and autoinflammatory diseases. Given the high degree of conservation, zebrafish Psma3 is a valuable model for investigating the role of the proteasome in normal physiology and in the pathogenesis of diseases involving impaired protein degradation or ubiquitin-proteasome system dysfunction.