3VZ2

Structural insights into substrate and cofactor selection by sp2771

3VZ2 の概要

• エントリーDOI: 10.2210/pdb3vz2/pdb
• 関連するPDBエントリー: 3VZ0 3VZ1 3VZ3
• 分子名称: Succinate-semialdehyde dehydrogenase (2 entities in total)
• 機能のキーワード: substrate selection, cofactor preference, oxidoreductase
• 由来する生物種: Synechococcus
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 101713.88

構造登録者

Yuan, Y.A.,Yuan, Z.,Yin, B.,Wei, D. (登録日: 2012-10-09, 公開日: 2013-10-16, 最終更新日: 2023-11-08)

主引用文献

Yuan, Z.,Yin, B.,Wei, D.,Yuan, Y.R.
Structural basis for cofactor and substrate selection by cyanobacterium succinic semialdehyde dehydrogenase
J.Struct.Biol., 182:125-135, 2013

PubMed Abstract: Aldehyde dehydrogenase (ALDH) catalyzes the oxidation of aldehydes to carboxylic acids. Cyanobacterium Synechococcus contains one ALDH enzyme (Sp2771), together with a novel 2-oxoglutarate decarboxylase, to complete a non-canonical tricarboxylic acid cycle. However, the molecular mechanisms for substrate selection and cofactor preference by Sp2771 are largely unknown. Here, we report crystal structures of wild type Sp2771, Sp2771 S419A mutant and ternary structure of Sp2771 C262A mutant in complex with NADP(+) and SSA, as well as binary structure of Gluconobacter oxydans aldehyde dehydrogenase (Gox0499) in complex with PEG. Structural comparison of Sp2771 with Gox0499, coupled with mutational analysis, demonstrates that Ser157 residue in Sp2771 and corresponding Pro159 residue in Gox0499 play critical structural roles in determining NADP(+) and NAD(+) preference for Sp2771 and Gox0499, respectively, whereas size and distribution of hydrophobic residues along the substrate binding funnel determine substrate selection. Hence, our work has provided insightful structural information into cofactor and substrate selection by ALDH.

PubMed: 23500184
DOI: 10.1016/j.jsb.2013.03.001

実験手法

X-RAY DIFFRACTION (2.5 Å)