How rod cells let you see in dim light
Probing the molecular mechanisms that regulate key steps in the GPCR-sensory response pathway responsible for vision in dim light
This project looks at how proteins in the eye's rod cells work together to let people see in dim light, which could help people with night-vision problems.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | Cornell University NIH-funded |
| Lab location | 1 site (Ithaca, United States) |
| Project ID | NIH-11110437 on NIH RePORTER |
What this research studies
Researchers will use high-resolution structural imaging (cryo-electron microscopy) and laboratory biochemical tests to observe how the light-sensing protein rhodopsin activates the G protein transducin and how activated transducin turns on the enzyme PDE6. They plan to test a new model in which two activated transducin subunits bind and activate PDE6. The experiments use purified proteins and structural snapshots rather than treating patients directly. Findings could clarify how tiny molecular steps allow rod cells to amplify and transmit weak light signals.
Who could benefit from this research
Good fit: People with night-blindness symptoms or inherited rod-cell diseases (for example certain forms of retinitis pigmentosa) would be the most likely future beneficiaries.
Not a fit: People whose vision loss is caused by non-rod problems (such as macular degeneration affecting cone cells) may not directly benefit from this research.
Why it matters
Potential benefit: If successful, this work could reveal precise molecular steps behind night vision and help guide future diagnostics or treatments for rod-related vision disorders.
How similar studies have performed: High-resolution structural and biochemical studies have already clarified many GPCR–G protein interactions, but the specific model for how transducin activates PDE6 is recent and still needs testing.
Where this research is happening
Ithaca, United States
- Cornell University — Ithaca, United States (Active)
Researchers
- Principal investigator: Cerione, Richard a. — Cornell University
- Study coordinator: Cerione, Richard a.
About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page below.