New research has shown how an unusual gene is needed for brain development in young mice.

Since the human genome was first sequenced in 2001, scientists have puzzled over swathes of DNA that despite apparently lacking function are made into ribonucleic acid (RNA) by the cell. The University of Bath reports its scientists, along with colleagues from the Universities of Oxford and Edinburgh, have now identified a non-coding RNA, called Paupar, which influences how healthy brains develop during early life. They have shown that Paupar orchestrates proteins that control neurodevelopment.

The researchers studied KAP1, a gene that codes for an essential protein associated with several fundamental processes in neurodevelopment. The KAP1 protein acts as a regulator for several other genes which allow the brain to grow healthily and develop several types of brain cell. Using molecular biology techniques they discovered that Paupar can act as a switch, modulating how KAP1 acts by binding to it, influencing the development of healthy brains in mice. It is the first time that a non-coding RNA has been shown to bind to KAP1.

The research is published in The EMBO Journal.

Dr Keith Vance, from the University of Bath Department of Biology & Biochemistry, led the research. He said “It is now clear that the genome expresses many non-coding RNAs that are not made into protein. Despite this, there is a lot of controversy regarding their function. Some groups argue that these non-coding RNAs are a result of transcriptional noise with no apparent use whilst others think that the vast majority of them must be doing something important. We have shown here good evidence that one of these genes, called Paupar, is important for development of the brain. It’s a young field, but I think it’s clear we have to reassess the central dogma of molecular biology that DNA is transcribed to RNA that codes for a protein. We’re now seeing that some RNAs can go off and do something themselves. Our findings also help us understand the essential role of KAP1, which is something we’re really interested in as we look at the development of the central nervous system.”

This research was funded by the Biotechnology and Biological Sciences Research Council (BBSRC) and the Medical Research Council (MRC).