1VB0

Atomic resolution structure of atratoxin-b, one short-chain neurotoxin from Naja atra

1VB0 の概要

• エントリーDOI: 10.2210/pdb1vb0/pdb
• 分子名称: Cobrotoxin b, SULFATE ION, 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL, ... (4 entities in total)
• 機能のキーワード: short-chain neurotoxin, three-finger toxin, toxin
• 由来する生物種: Naja atra (Chinese cobra)
• 細胞内の位置: Secreted: P80958
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 7061.89

構造登録者

Lou, X.,Liu, Q.,Teng, M.,Niu, L.,Huang, Q.,Hao, Q. (登録日: 2004-02-20, 公開日: 2004-12-21, 最終更新日: 2024-11-13)

主引用文献

Lou, X.,Liu, Q.,Tu, X.,Wang, J.,Teng, M.,Niu, L.,Schuller, D.J.,Huang, Q.,Hao, Q.
The atomic resolution crystal structure of atratoxin determined by single wavelength anomalous diffraction phasing
J.Biol.Chem., 279:39094-39104, 2004

PubMed Abstract: By using single wavelength anomalous diffraction phasing based on the anomalous signal from copper atoms, the crystal structure of atratoxin was determined at the resolution of 1.5 A and was refined to an ultrahigh resolution of 0.87 A. The ultrahigh resolution electron density maps allowed the modeling of 38 amino acid residues in alternate conformations and the location of 322 of 870 possible hydrogen atoms. To get accurate information at the atomic level, atratoxin-b (an analog of atratoxin with reduced toxicity) was also refined to an atomic resolution of 0.92 A. By the sequence and structural comparison of these two atratoxins, Arg(33) and Arg(36) were identified to be critical to their varied toxicity. The effect of copper ions on the distribution of hydrogen atoms in atratoxin was discussed, and the interactions between copper ions and protein residues were analyzed based on a statistical method, revealing a novel pentahedral copper-binding motif.

PubMed: 15252034
DOI: 10.1074/jbc.M403863200

実験手法

X-RAY DIFFRACTION (0.92 Å)