7QK8

Crystal structure of the ALDH1A3-NAD+ complex

7QK8 の概要

• エントリーDOI: 10.2210/pdb7qk8/pdb
• 分子名称: Aldehyde dehydrogenase family 1 member A3, NICOTINAMIDE-ADENINE-DINUCLEOTIDE, DI(HYDROXYETHYL)ETHER, ... (7 entities in total)
• 機能のキーワード: aldh1a3, aldehyde dehydrogenase family 1 member a3, nad+, oxidoreductase
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 119485.79

構造登録者

Castellvi, A.,Farres, J. (登録日: 2021-12-17, 公開日: 2022-04-20, 最終更新日: 2024-01-31)

主引用文献

Castellvi, A.,Pequerul, R.,Barracco, V.,Juanhuix, J.,Pares, X.,Farres, J.
Structural and biochemical evidence that ATP inhibits the cancer biomarker human aldehyde dehydrogenase 1A3.
Commun Biol, 5:354-354, 2022

PubMed Abstract: Human aldehyde dehydrogenase (ALDH) participates in the oxidative stress response and retinoid metabolism, being involved in several diseases, including cancer, diabetes and obesity. The ALDH1A3 isoform has recently elicited wide interest because of its potential use as a cancer stem cell biomarker and drug target. We report high-resolution three-dimensional ALDH1A3 structures for the apo-enzyme, the NAD complex and a binary complex with ATP. Each subunit of the ALDH1A3-ATP complex contains one ATP molecule bound to the adenosine-binding pocket of the cofactor-binding site. The ATP complex also shows a molecule, putatively identified as a polyethylene glycol aldehyde, covalently bound to the active-site cysteine. This mimics the thioacyl-enzyme catalytic intermediate, which is trapped in a dead enzyme lacking an active cofactor. At physiological concentrations, ATP inhibits the dehydrogenase activity of ALDH1A3 and other isoforms, with a K value of 0.48 mM for ALDH1A3, showing a mixed inhibition type against NAD. ATP also inhibits esterase activity in a concentration-dependent manner. The current ALDH1A3 structures at higher resolution will facilitate the rational design of potent and selective inhibitors. ATP binding to ALDH1A3 enables activity modulation by the energy status of the cell and metabolic reprogramming, which may be relevant in several disease conditions.

PubMed: 35418200
DOI: 10.1038/s42003-022-03311-1

実験手法

X-RAY DIFFRACTION (1.893 Å)