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Structure and developmental expression of the mouse RGR opsin gene
Molecular Vision
|December 8, 1998
Summary
This study characterized the mouse retinal G protein-coupled receptor (RGR) and its gene expression during retinal development. RGR expression in retinal pigment epithelium (RPE) cells appears late in development, progressing from central to peripheral regions.
Area of Science:
- Molecular Biology
- Neuroscience
- Genetics
Background:
- The retinal G protein-coupled receptor (RGR) plays a role in retinal function.
- Understanding RGR gene structure and expression is crucial for comprehending retinal development and physiology.
Purpose of the Study:
- To isolate and characterize cDNA and gene clones for mouse RPE retinal G protein-coupled receptor (RGR).
- To analyze the spatiotemporal expression pattern of the RGR gene during mouse retinal development.
Main Methods:
- Isolation of mouse RGR cDNA and gene clones from respective libraries.
- Analysis of RGR expression in developing mouse retina using immunohistochemical staining with a specific antibody.
Main Results:
- Mouse RGR shares high amino acid sequence identity with bovine and human RGR.
- The mouse RGR gene spans approximately 11 kb and is divided into seven exons.
- RGR immunoreactivity in retinal pigment epithelium (RPE) cells was first detected at postnatal day 2, with expression gradually increasing and spreading from central to peripheral retina by postnatal day 16.
Conclusions:
- Mouse and human RGR proteins are highly conserved.
- RGR expression in the RPE follows a developmental gradient, from central to peripheral retina.
- RGR gene induction is a late event in RPE cell maturation, occurring after melanin production.