Analysis of regulation of telomerase action and telomere capping function by the telomeric complex.

Every time a cell divides, it must solve a problem at the very ends of its chromosomes—and this project will unpick the molecular machinery that keeps those ends from fraying or fusing. The problem is that chromosome ends look like broken DNA to a cell’s repair systems, which would mistakenly try to glue them together. Specialised caps called telomeres, built from repetitive DNA and maintained by the enzyme telomerase, prevent this. But telomerase must be precisely controlled: too little activity and telomeres shorten, triggering cell ageing; too much and they lengthen, a hallmark of many cancers. Researchers do not yet understand how the protein complex that coats telomeric DNA regulates telomerase’s action and simultaneously protects the chromosome end from being mistaken for damage. This is fundamental science. The work uses simple fungi as a model to dissect the regulatory mechanisms, with the long-term goal of applying that knowledge to human biology. If successful, it will reveal the molecular dials that tune telomerase activity—insight that could eventually inform strategies for cancer treatment (where telomerase is overactive) or regenerative medicine (where controlled telomere lengthening might delay cellular ageing). No immediate practical application is expected, but past fundamental discoveries about telomeres and telomerase earned a Nobel Prize and opened entire fields of biomedical research.