1QTF

CRYSTAL STRUCTURE OF EXFOLIATIVE TOXIN B

1QTF の概要

• エントリーDOI: 10.2210/pdb1qtf/pdb
• 分子名称: EXFOLIATIVE TOXIN B (2 entities in total)
• 機能のキーワード: serine protease, superantigen, hydrolase, toxin
• 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: 27291.50

構造登録者

Vath, G.M.,Earhart, C.A.,Monie, D.D.,Schlievert, P.M.,Ohlendorf, D.H. (登録日: 1999-06-27, 公開日: 1999-08-31, 最終更新日: 2024-02-14)

主引用文献

Vath, G.M.,Earhart, C.A.,Monie, D.D.,Iandolo, J.J.,Schlievert, P.M.,Ohlendorf, D.H.
The crystal structure of exfoliative toxin B: a superantigen with enzymatic activity.
Biochemistry, 38:10239-10246, 1999

PubMed Abstract: The exfoliative toxins (ETs) cause staphylococcal scalded skin syndrome, a disease characterized by specific separation of layers of the skin. Evidence suggests that the toxins act as serine proteases, though the specific substrate and mode of action are not known for certain. The crystal structure of exfoliative toxin A (ETA) was reported earlier and shown to be similar to that of the chymotrypsin-like serine proteases. Here, we report the 2.4 A resolution crystal structure of the other exfoliative toxin, ETB, which is 40% identical to ETA. The overall structures of ETA and ETB are similar including the positions of key residues within the active site. The structure of ETB supports the previous findings that the ETs are serine proteases that cleave substrates after glutamic acid residues. In this study we also discuss a number of structural differences including a large 14 residue loop insertion which may be a key feature involved in the differing biological properties of the ETs, particularly the pyrogenic and lethal activities of ETB not shared by ETA.

PubMed: 10441117
DOI: 10.1021/bi990721e

実験手法

X-RAY DIFFRACTION (2.4 Å)