8RNX

Hen Egg White Lysozyme soaked with [HIsq][trans-RuCl4(DMSO)(Isq)]

8RNX の概要

• エントリーDOI: 10.2210/pdb8rnx/pdb
• 関連するPDBエントリー: 5LVG 5LVH 5LVI 5LVJ
• 分子名称: Lysozyme C, 1,2-ETHANEDIOL, SODIUM ION, ... (6 entities in total)
• 機能のキーワード: lysozyme, ruthenium, complex, hydrolase
• 由来する生物種: Gallus gallus (chicken)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 14646.64

構造登録者

Oszajca, M.,Flejszar, M.,Szura, A.,Drozdz, P.,Brindell, M.,Kurpiewska, K. (登録日: 2024-01-11, 公開日: 2024-01-24, 最終更新日: 2024-10-16)

主引用文献

Oszajca, M.,Flejszar, M.,Szura, A.,Drozdz, P.,Brindell, M.,Kurpiewska, K.
Exploring the coordination chemistry of ruthenium complexes with lysozymes: structural and in-solution studies.
Front Chem, 12:1371637-1371637, 2024

PubMed Abstract: This study presents a comprehensive structural analysis of the adducts formed upon the reaction of two Ru(III) complexes [HIsq][-RuCl(dmso)(Isq)] () and [HInd][-RuCl(dmso)(HInd)] () (where HInd-indazole, Isq-isoquinoline, analogs of NAMI-A) and two Ru(II) complexes, -[RuCl(dmso)] () and -[RuCl(dmso)] (), with hen-egg white lysozyme (HEWL). Additionally, the crystal structure of an adduct of human lysozyme (HL) with ruthenium complex, [HInd][-RuCl(dmso)(HInd)] was solved. X-ray crystallographic data analysis revealed that all studied Ru complexes, regardless of coordination surroundings and metal center charge, coordinate to the same amino acids (His15, Arg14, and Asp101) of HEWL, losing most of their original ligands. In the case of the -HL adduct, two distinct metalation sites: (i) Arg107, Arg113 and (ii) Gln127, Gln129, were identified. Crystallographic data were supported by studies of the interaction of and with HEWL in an aqueous solution. Hydrolytic stability studies revealed that both complexes and liberate the N-heterocyclic ligand under crystallization-like conditions (pH 4.5) as well as under physiological pH conditions, and this process is not significantly affected by the presence of HEWL. A comparative examination of nine crystal structures of Ru complexes with lysozyme, obtained through soaking and co-crystallization experiments, together with in-solution studies of the interaction between and with HEWL, indicates that the hydrolytic release of the N-heterocyclic ligand is one of the critical factors in the interaction between Ru complexes and lysozyme. This understanding is crucial in shedding light on the tendency of Ru complexes to target diverse metalation sites during the formation and in the final forms of the adducts with proteins.

PubMed: 38638879
DOI: 10.3389/fchem.2024.1371637

実験手法

X-RAY DIFFRACTION (1.25 Å)