Synonyms:E.C.1.14.13.39;NO synthase;NOS;Nitricoxide synthase;Nitric oxide synthetase;
99%, *data from raw suppliers
NOS1 *data from reagent suppliers
Nitric oxide synthase (nNOS) is an enzyme responsible for the production of nitric oxide (NO) in the central nervous system. It is one of the three isoforms of nitric oxide synthase (NOS) and plays a crucial role in various physiological processes, including neurotransmission, vasodilation, and platelet aggregation. In the context of this research, nNOS is targeted for the development of selective inhibitors to treat neurodegenerative disorders. The study focuses on the active site of nNOS, where a conserved structural water molecule is found. This water molecule is hydrogen bonded between the heme propionates and the inhibitors. The researchers hypothesize that by attaching a hydrogen bond donor group to the inhibitors, they can displace this water molecule and achieve a direct interaction with the heme cofactor, potentially enhancing the binding affinity of the inhibitors. The study involves the design and synthesis of peptidomimetic analogues with N-hydroxyl or N-amino donor groups to test this hypothesis. X-ray crystallography is used to verify the displacement of the water molecule and the direct interaction with the heme propionate. The results show that while the displacement is successful, it does not significantly enhance the binding affinity, indicating that additional structural modifications are necessary for more potent nNOS inhibitors.
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