MRC Laboratory of Molecular Biology
One of the world's leading research institutes, our scientists are working to advance understanding of biological processes at the molecular level - providing the knowledge needed to solve key problems in human health.
During eukaryotic cell division (mitosis) the cell’s chromosomes are duplicated and then equally separated into two new daughter cells. To prevent errors in mitosis cells employ checkpoints that monitor and coordinate the correct order of events. Checkpoints either delay cell division, or if unrecoverable, cause cell death.
HIV is a retrovirus, meaning it has to copy its RNA genome into DNA in order to infect cells. While much has been learned about the virus, investigators don’t understand how it evades our immune system so successfully. A long-standing question has been how the HIV virus copies its genome using raw materials from the cell without being detected by immune sensors.
Cell survival depends on adaptive signalling pathways to ensure that the supply of vital components matches the fluctuating needs of the cell. The proteasome is essential for the selective degradation of most cellular proteins and thereby controls virtually all cellular processes. The current prevailing view is that protein degradation is largely regulated at the level of ubiquitination.
The spliceosome is a molecular machine, which together with RNA polymerases and ribosomes plays a critical role in basic gene expression. Due to its highly dynamic nature the structure of the spliceosome has remained elusive until now. Research by Kiyoshi Nagai’s group, in the LMB’s Structural Studies Division, has for the first time captured the spliceosome in a fully active, substrate-bound state, immediately after first catalytic reaction.
Researchers in Greg Jefferis’s group in the LMB’s Neurobiology Division have developed a new online tool to analyse images of neurons. This tool, known as NBLAST, is free and available to all. NBLAST enables researchers to measure the similarity between neurons and organise them into neuron families, akin to tools such as BLAST that allow protein sequences to be compared.
Neuroscience is seeing a period of major growth in the structural characterisation of neurons.
Circadian clocks are found across all higher species, controlling daily rhythms of behaviour and physiology. They are thought to “tick” by producing and then degrading circadian proteins on a 24 hour cycle. At a molecular level, they typically involve expression of “clock” genes that are inhibited approximately every 24 hours by the proteins they encode.