7AVG

Perdeuterated hen egg-white lysozyme at 100 K

7AVG の概要

• エントリーDOI: 10.2210/pdb7avg/pdb
• 分子名称: Lysozyme, NITRATE ION, ACETATE ION, ... (4 entities in total)
• 機能のキーワード: perdeuterated, lysozyme, hewl, hydrolase
• 由来する生物種: Gallus gallus
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 14945.29

構造登録者

Ramos, J.,Laux, V.,Haertlein, M.,Erba Boeri, E.,Forsyth, V.T.,Mossou, E.,Larsen, S.,Langkilde, A.E. (登録日: 2020-11-05, 公開日: 2021-05-12, 最終更新日: 2024-01-31)

主引用文献

Ramos, J.,Laux, V.,Haertlein, M.,Boeri Erba, E.,McAuley, K.E.,Forsyth, V.T.,Mossou, E.,Larsen, S.,Langkilde, A.E.
Structural insights into protein folding, stability and activity using in vivo perdeuteration of hen egg-white lysozyme.
Iucrj, 8:372-386, 2021

PubMed Abstract: This structural and biophysical study exploited a method of perdeuterating hen egg-white lysozyme based on the expression of insoluble protein in followed by in-column chemical refolding. This allowed detailed comparisons with perdeuterated lysozyme produced in the yeast , as well as with unlabelled lysozyme. Both perdeuterated variants exhibit reduced thermal stability and enzymatic activity in comparison with hydrogenated lysozyme. The thermal stability of refolded perdeuterated lysozyme is 4.9°C lower than that of the perdeuterated variant expressed and secreted in yeast and 6.8°C lower than that of the hydrogenated protein. However, both perdeuterated variants exhibit a comparable activity. Atomic resolution X-ray crystallographic analyses show that the differences in thermal stability and enzymatic function are correlated with refolding and deuteration effects. The hydrogen/deuterium isotope effect causes a decrease in the stability and activity of the perdeuterated analogues; this is believed to occur through a combination of changes to hydrophobicity and protein dynamics. The lower level of thermal stability of the refolded perdeuterated lysozyme is caused by the unrestrained Asn103 peptide-plane flip during the unfolded state, leading to a significant increase in disorder of the Lys97-Gly104 region following subsequent refolding. An ancillary outcome of this study has been the development of an efficient and financially viable protocol that allows stable and active perdeuterated lysozyme to be more easily available for scientific applications.

PubMed: 33953924
DOI: 10.1107/S2052252521001299

実験手法

X-RAY DIFFRACTION (1 Å)