3BCK

Crystal Structure of Staphylococcus aureus DsbA T153V

3BCK の概要

• エントリーDOI: 10.2210/pdb3bck/pdb
• 関連するPDBエントリー: 1bed 1dsb 3BCI 3BD2
• 分子名称: Disulfide bond protein A (2 entities in total)
• 機能のキーワード: thiol-disulfide oxidoreductase, redox protein, protein folding, redox active centre, oxidoreductase
• 由来する生物種: Staphylococcus aureus
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 21808.01

構造登録者

Heras, B.,Thony-Meyer, L.,Martin, J.L. (登録日: 2007-11-13, 公開日: 2007-12-11, 最終更新日: 2024-10-09)

主引用文献

Heras, B.,Kurz, M.,Jarrott, R.,Shouldice, S.R.,Frei, P.,Robin, G.,Cemazar, M.,Thony-Meyer, L.,Glockshuber, R.,Martin, J.L.
Staphylococcus aureus DsbA Does Not Have a Destabilizing Disulfide: A NEW PARADIGM FOR BACTERIAL OXIDATIVE FOLDING
J.Biol.Chem., 283:4261-4271, 2008

PubMed Abstract: In Gram-negative bacteria, the introduction of disulfide bonds into folding proteins occurs in the periplasm and is catalyzed by donation of an energetically unstable disulfide from DsbA, which is subsequently re-oxidized through interaction with DsbB. Gram-positive bacteria lack a classic periplasm but nonetheless encode Dsb-like proteins. Staphylococcus aureus encodes just one Dsb protein, a DsbA, and no DsbB. Here we report the crystal structure of S. aureus DsbA (SaDsbA), which incorporates a thioredoxin fold with an inserted helical domain, like its Escherichia coli counterpart EcDsbA, but it lacks the characteristic hydrophobic patch and has a truncated binding groove near the active site. These findings suggest that SaDsbA has a different substrate specificity than EcDsbA. Thermodynamic studies indicate that the oxidized and reduced forms of SaDsbA are energetically equivalent, in contrast to the energetically unstable disulfide form of EcDsbA. Further, the partial complementation of EcDsbA by SaDsbA is independent of EcDsbB and biochemical assays show that SaDsbA does not interact with EcDsbB. The identical stabilities of oxidized and reduced SaDsbA may facilitate direct re-oxidation of the protein by extracellular oxidants, without the need for DsbB.

PubMed: 18077463
DOI: 10.1074/jbc.M707838200

実験手法

X-RAY DIFFRACTION (1.95 Å)