p21-activated kinase 1 messenger RNA 3' untranslated region (PAK1 mRNA 3' UTR)

The p21-activated kinase 1 (PAK1) messenger RNA 3' untranslated region (3' UTR) is a critical regulatory segment of the PAK1 transcript that controls protein expression through post-transcriptional mechanisms (UniProt P35465). PAK1 itself is a serine/threonine kinase that acts as a downstream effector for Rho GTPases like Rac1 and Cdc42, playing a central role in cytoskeleton remodeling, cell motility, and survival (PubMed PMID: 24608506). The 3' UTR contains multiple binding sites for microRNAs (miRNAs), such as miR-7 and miR-145, which normally act to suppress PAK1 translation or promote mRNA decay (PubMed PMID: 18483241). In many cancers, the loss of these regulatory miRNAs or alterations in the 3' UTR leads to PAK1 overexpression, driving tumor growth, metastasis, and resistance to therapy (PubMed PMID: 21135154). Consequently, the PAK1 mRNA 3' UTR is an attractive therapeutic target for RNA-based interventions, including miRNA mimics and antisense oligonucleotides, designed to restore normal regulation and reduce oncogenic PAK1 levels.

Other names

PAK1 3'-UTRp21-activated kinase 1 3' untranslated regionPAK1 mRNA regulatory regionPAK1 3' untranslated region

Binding of regulatory molecules such as microRNAs or antisense oligonucleotides to the 3' UTR induces mRNA degradation or inhibits ribosomal translation, thereby reducing the cellular levels of PAK1 protein.