Up to now there were no animal models suitable for understanding the significance of neurobeachin proteins in the functioning of the nervous system, for example in memory formation. Mice that are lacking the neurobeachin protein die shortly after birth. Fruit flies, on the other hand, can be alive and well without neurobeachin. The scientists also found in experiments on the flies that neurobeachin has a function in learning as the flies exhibit characteristic learning disabilities due to the absence of the protein.
The flies were also found to have a number of other abnormalities with regard to the development and function of the nervous system. Through a "genetic rescue experiment," the researchers were able to localize the distribution of these defects in the brain. The function of the lacking neurobeachin gene was reintroduced in certain areas of the nervous system. With this procedure, the researchers were able to show, among other things, that certain features of the neurobeachin protein in flies and mice are identical.
Karolien Volders, Sabrina Scholz, Jan R. Slabbaert, Anja C. Nagel, Patrik Verstreken, John W. M. Creemers, Patrick Callaerts, and Martin Schwärzel: "Drosophila rugose Is a Functional Homolog of Mammalian Neurobeachin and Affects Synaptic Architecture, Brain Morphology, and Associative Learning." The Journal of Neuroscience 32 (43): 24 October 2012. http://www.jneurosci.org/content/32/43/15193.full