Regional Differences in S-Nitrosylation in the Cortex, Striatum, and Hippocampus of Juvenile Male Mice.

Nitric oxide (NO) is a multifunctional neurotransmitter that plays a major role in neuronal and synaptic functions. S-nitrosylation (SNO), the NO-mediated protein posttransitional modification (PTM), is known to regulate physiological and pathological processes in the brain. However, the physiological role in different neuroanatomical brain regions has not been well investigated. To understand the role of SNO in the brain of juvenile WT mice, we used SNOTRAP technology. We mapped the SNO-proteome in three different neuroanatomical regions: cortex, striatum, and hippocampus. By conducting systems biology analysis, we found that the three brain regions share similar biological processes (BP) including biogenesis and developmental processes. Exclusive and different BP and molecular functions were found for each of the regions. Unraveling the BP and signaling mechanisms of SNO in the cortex, striatum, and hippocampus may help to understand the functional differences between the three regions under physiological conditions.