Recombinant Human IMPG2 protein (GST tag N-Terminus)

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IMPG2 also known as Interphotoreceptor Matrix Proteoglycan 2 plays an essential role in the structural makeup of the interphotoreceptor matrix. It acts as a proteoglycan characterized by a high molecular weight of approximately 123 kDa. This protein is predominantly expressed in the retina particularly within the retinal photoreceptor cells. Its mechanical function involves interacting with other components of the matrix contributing to the stability and maintenance of the structure.

Biological function summary

IMPG2 supports photoreceptor cell function by maintaining the gel-like environment necessary for correct photoreceptor activity. It is a part of the matrix complex providing a supportive scaffold for cellular and molecular interactions. The presence of this protein enhances the efficiency of nutrient exchange between the retinal pigment epithelium and photoreceptor cells which is critical for phototransduction and overall retinal health.

Pathways

The function of IMPG2 integrates into the visual perception pathway and phototransduction pathway. Its role involves interactions with opsin proteins which are critical for initiating visual signal transduction. Additionally IMPG2 is associated with rhodopsin an important visual pigment in these pathways supporting its structural and functional stability within the retinal environment.

IMPG2 relates significantly to retinitis pigmentosa and vitelliform macular dystrophy. Mutations in the IMPG2 gene contribute to the degenerative processes observed in these retinal diseases. In the context of retinitis pigmentosa IMPG2's interactions with proteins like peripherin-2 help explain the phenotype of the disorder. In vitelliform macular dystrophy an impaired IMPG2 protein disrupts matrix composition affecting visual outcomes.