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Study Shows Tomosyn Plays an Important Role in Learning and Memory

According to the researchers for US it was found that tomosyn plays an important role in memory and learning.

The protein gets its name from the Japanese language //because it was initially discovered by a Japanese researcher and his team. This protein binds to syntaxin another protein which is very essential to maintain life. Hence the protein was named tomosyn, tomo meaning friend in Japanese. Better understanding of the neurological function of this protein may lead to a better understanding of how synapses get stronger or weaker, and how that, in turn, affects memory formation and loss, says Janet Richmond, associate professor of biological sciences at the University of Illinois at Chicago.

‘It's amazing we remember things from as far back as our early childhood with the constant protein turnover going on in our brains,’ said Richmond. ‘So understanding how proteins function to control synaptic strength is really important.’ Richmond and her colleagues used the soil nematode worm Caenorhabditis elegans to study the function of tomosyn using a recording technique she developed to understand how synaptic proteins affect release of neurotransmitters at the nerve cell junctions. The lab's ability to study synaptic transmission was recently improved with the addition of high pressure freeze electron microscopy and immuno-gold staining, which together provide a clearer picture of where neurotransmitter-containing synaptic vesicles and proteins cluster. Mutant worms lacking tomosyn were compared to normal worms to determine what effect, if any, the protein had on neuronal transmission.

The observed effect is substantial -- the protein helps put a limit on the number of synaptic vesicles that become competent to fuse at synapses, thereby regulating the amount of neurotransmitter released. ‘If you remove tomosyn, you get exuberant neurotransmitter release,’ said Richmond. ‘This suggests tomosyn is a negative regulator of release. In other words, it dampens down the system, regulating the efficiency and strength of the synapse.’ Because the nematode C. elegans uses proteins in its nervous system comparable to those in humans, Richmond suspects that forthcoming experiments involving tomosyn in mammals such as laboratory mice will show similar results.

Source: Eurealert
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