8TM7 image
Entry Detail
PDB ID:
8TM7
Keywords:
Title:
Human NAMPT in complex with substrate NAM and small molecule activator NP-A3
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2023-07-28
Release Date:
2024-06-12
Method Details:
Experimental Method:
Resolution:
1.79 Å
R-Value Free:
0.19
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Nicotinamide phosphoribosyltransferase
Chain IDs:A, B
Chain Length:499
Number of Molecules:2
Biological Source:Homo sapiens
Primary Citation
Nicotinamide Phosphoribosyltransferase Positive Allosteric Modulators Attenuate Neuronal Oxidative Stress.
Acs Med.Chem.Lett. 15 205 214 (2024)
PMID: 38352833 DOI: 10.1021/acsmedchemlett.3c00391

Abstact

Evidence supports boosting nicotinamide adenine dinucleotide (NAD+) to counteract oxidative stress in aging and neurodegenerative disease. One approach is to enhance the activity of nicotinamide phosphoribosyltransferase (NAMPT). Novel NAMPT positive allosteric modulators (N-PAMs) were identified. A cocrystal structure confirmed N-PAM binding to the NAMPT rear channel. Early hit-to-lead efforts led to a 1.88-fold maximum increase in the level of NAD+ in human THP-1 cells. Select N-PAMs were assessed for mitigation of reactive oxygen species (ROS) in HT-22 neuronal cells subject to inflammatory stress using tumor necrosis factor alpha (TNFα). N-PAMs that increased NAD+ more effectively in THP-1 cells attenuated TNFα-induced ROS more effectively in HT-22 cells. The most efficacious N-PAM completely attenuated ROS elevation in glutamate-stressed HT-22 cells, a model of neuronal excitotoxicity. This work demonstrates for the first time that N-PAMs are capable of mitigating elevated ROS in neurons stressed with TNFα and glutamate and provides support for further N-PAM optimization for treatment of neurodegenerative diseases.

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