5LKD

Crystal structure of the Xi glutathione transferase ECM4 from Saccharomyces cerevisiae in complex with glutathione

5LKD の概要

• エントリーDOI: 10.2210/pdb5lkd/pdb
• 分子名称: Glutathione S-transferase omega-like 2, GLUTATHIONE (3 entities in total)
• 機能のキーワード: saccharomyces cerevisiae, glutathione transferase, glutathione, quinone, ecm4, ykr076w, glutathionyl-hydroquinone reductase, transferase
• 由来する生物種: Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
• 細胞内の位置: Cytoplasm : P36156
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 89428.12

構造登録者

Schwartz, M.,Didierjean, C.,Hecker, A.,Girardet, J.M.,Morel-Rouhier, M.,Gelhaye, E.,Favier, F. (登録日: 2016-07-22, 公開日: 2016-10-26, 最終更新日: 2024-04-03)

主引用文献

Schwartz, M.,Didierjean, C.,Hecker, A.,Girardet, J.M.,Morel-Rouhier, M.,Gelhaye, E.,Favier, F.
Crystal Structure of Saccharomyces cerevisiae ECM4, a Xi-Class Glutathione Transferase that Reacts with Glutathionyl-(hydro)quinones.
Plos One, 11:e0164678-e0164678, 2016

PubMed Abstract: Glutathionyl-hydroquinone reductases (GHRs) belong to the recently characterized Xi-class of glutathione transferases (GSTXs) according to unique structural properties and are present in all but animal kingdoms. The GHR ScECM4 from the yeast Saccharomyces cerevisiae has been studied since 1997 when it was found to be potentially involved in cell-wall biosynthesis. Up to now and in spite of biological studies made on this enzyme, its physiological role remains challenging. The work here reports its crystallographic study. In addition to exhibiting the general GSTX structural features, ScECM4 shows extensions including a huge loop which contributes to the quaternary assembly. These structural extensions are probably specific to Saccharomycetaceae. Soaking of ScECM4 crystals with GS-menadione results in a structure where glutathione forms a mixed disulfide bond with the cysteine 46. Solution studies confirm that ScECM4 has reductase activity for GS-menadione in presence of glutathione. Moreover, the high resolution structures allowed us to propose new roles of conserved residues of the active site to assist the cysteine 46 during the catalytic act.

PubMed: 27736955
DOI: 10.1371/journal.pone.0164678

実験手法

X-RAY DIFFRACTION (1.68 Å)