UC San Diego Invention Changes How Scientists Track Genes
- UC San Diego researchers developed a bright, stable red fluorescent protein for gene tracking.
- The new tool enables simultaneous observation of multiple biological processes.
- It overcomes limitations of existing green fluorescent proteins in complex studies.
A New Tool for Gene Tracking
Researchers at the University of California San Diego have created a new red fluorescent protein that is transforming how scientists track genes. The invention allows researchers to observe multiple biological processes at once, something that was difficult with existing tools.
The new protein, described in a study published recently, is brighter and more stable than previous red fluorescent proteins. This makes it easier to use in living cells and organisms.
Why Red Matters
For decades, green fluorescent protein (GFP) has been the workhorse of biological imaging. But GFP has limits. When scientists want to track two or three different genes at the same time, the green signal can overlap with other colours.
Red fluorescent proteins solve this problem because they emit light at a longer wavelength. This separates them clearly from green and blue markers. The UC San Diego team engineered a version that is not only red but also resists fading under a microscope.
How It Works
The team used a technique called directed evolution to create the new protein. They mutated the genetic code of an existing red fluorescent protein and screened thousands of variants until they found one with superior brightness and stability.
The result is a protein that can be attached to any gene of interest. When that gene is active, the cell glows red. Scientists can then watch in real time where and when the gene turns on.
Applications in Research
This invention opens doors in fields like cancer biology and neuroscience. For example, researchers could track tumour growth while simultaneously monitoring the immune response in the same animal.
In brain studies, scientists could label neurons that fire during learning with one colour and neurons involved in memory with another. The red protein adds a third channel for tracking a different set of cells.
What Comes Next
The UC San Diego team is already working with other labs to test the protein in different organisms, from zebrafish to mice. They are also exploring ways to make the protein even brighter for deep-tissue imaging.
Officials at the university have not disclosed any commercial partnerships yet, but the technology is expected to be made widely available to the scientific community through standard distribution channels.