Structural highlights
3tyo is a 2 chain structure with sequence from Buffalo rat. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | ACT, DXW, H4B, HEM, ZN |
| Related: | 3tyl, 3tym, 3tyn |
| Gene: | Nos1, Bnos (Buffalo rat) |
| Activity: | Nitric-oxide synthase (NADPH dependent), with EC number 1.14.13.39 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[NOS1_RAT] Produces nitric oxide (NO) which is a messenger molecule with diverse functions throughout the body. In the brain and peripheral nervous system, NO displays many properties of a neurotransmitter. Inhibitory transmitter for non-adrenergic and non-cholinergic nerves in the colorectum. Probably has nitrosylase activity and mediates cysteine S-nitrosylation of cytoplasmic target proteins such SRR. Inhibitory transmitter for non-adrenergic and non-cholinergic nerves in the colorectum.
Publication Abstract from PubMed
Selective neuronal nitric oxide synthase (nNOS) inhibitors have therapeutic applications in the treatment of numerous neurodegenerative diseases. Here we report the synthesis and evaluation of a series of inhibitors designed to have increased cell membrane permeability via intramolecular hydrogen bonding. Their potencies were examined in both purified enzyme and cell-based assays; a comparison of these results demonstrates that two of the new inhibitors display significantly increased membrane permeability over previous analogs. NMR spectroscopy provides evidence of intramolecular hydrogen bonding under physiological conditions in two of the inhibitors. Crystal structures of the inhibitors in the nNOS active site confirm the predicted non-intramolecular hydrogen bonded binding mode. Intramolecular hydrogen bonding may be an effective approach for increasing cell membrane permeability without affecting target protein binding.
Intramolecular hydrogen bonding: A potential strategy for more bioavailable inhibitors of neuronal nitric oxide synthase.,Labby KJ, Xue F, Kraus JM, Ji H, Mataka J, Li H, Martasek P, Roman LJ, Poulos TL, Silverman RB Bioorg Med Chem. 2012 Feb 7. PMID:22370337[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Labby KJ, Xue F, Kraus JM, Ji H, Mataka J, Li H, Martasek P, Roman LJ, Poulos TL, Silverman RB. Intramolecular hydrogen bonding: A potential strategy for more bioavailable inhibitors of neuronal nitric oxide synthase. Bioorg Med Chem. 2012 Feb 7. PMID:22370337 doi:10.1016/j.bmc.2012.01.037
