The role of junctophilin proteins in cellular function

The role of junctophilin proteins in cellular function is not fully understood. Prior research has shown that junctophilins (JPHs) connect plasma membranes to intracellular organelles like the ER/SR. These connections form subcellular junctions important for signaling in excitable cells. However, the specific mechanisms of JPH function remain unclear. No prior work had resolved the full evolutionary history of JPHs. That uncertainty drove this review to synthesize current knowledge. The gap motivated a detailed analysis of JPH structure and function. This paper's contribution is a comprehensive overview of JPH isoforms and their roles in disease. The review approach aims to clarify how JPH deficits may contribute to pathogenesis.

This review aims to clarify the role of junctophilin proteins in cellular function. The specific problem is the lack of a complete synthesis of JPH biology and disease associations. The motivation stems from the need to understand how JPH isoforms contribute to membrane junctions and signaling. The study focuses on JPH gene family structure, evolution, and function. The authors propose to examine JPH biogenesis and binding partners. They also aim to explore how JPH deficits may contribute to disease. This paper's contribution is a detailed analysis of JPH isoform roles in excitable cells. The review approach will help identify gaps in current understanding.

The review approach involves synthesizing evidence from existing literature. The authors use phylogenetic analysis to study JPH gene evolution. They examine structural features of JPH isoforms, including MORN motifs. The study also includes analysis of JPH membrane tethering mechanisms. Binding partners of JPH proteins are reviewed in detail. The authors assess functional roles of JPH isoforms in excitable cells. They also analyze how JPH deficits may contribute to disease pathogenesis. The review approach includes examining mutations in JPH2 and JPH3 genes.

JPH isoforms connect plasma membranes to ER/SR membranes. Each JPH contains six MORN motifs and a transmembrane region. JPH proteins form subcellular junctions important for signaling. JPH2 mutations cause cardiomyopathy and heart failure. JPH3 trinucleotide expansions cause Huntington Disease-Like 2. Loss of JPH1 leads to skeletal myopathy. JPH isoforms play essential roles in membrane junction development. The review highlights the importance of JPHs in excitable cell function.

The review approach clarifies the role of JPH proteins in cellular function. JPH isoforms are essential for forming membrane junctions in excitable cells. The authors propose that JPH deficits contribute to disease pathogenesis. They suggest that JPH2 and JPH3 mutations have specific clinical implications. The study emphasizes the importance of JPH structure and evolution. The review approach highlights gaps in understanding JPH biogenesis. The authors conclude that further research is needed on JPH binding partners. They suggest that JPHs are important targets for future studies on cell signaling.