2JRD

Influenza Hemagglutinin Fusion Domain Mutant F9A

2JRD の概要

• エントリーDOI: 10.2210/pdb2jrd/pdb
• 関連するPDBエントリー: 1ibn 1ibo
• NMR情報: BMRB: 15390
• 分子名称: Hemagglutinin (1 entity in total)
• 機能のキーワード: influenza, hemagglutinin, fusion domain, f9a, viral protein
• 由来する生物種: Influenza A virus
• 細胞内の位置: Virion membrane; Single-pass type I membrane protein (Potential): P11134
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 2712.15

構造登録者

Lai, A.L.,Tamm, L.K. (登録日: 2007-06-25, 公開日: 2007-07-10, 最終更新日: 2023-12-20)

主引用文献

Lai, A.L.,Tamm, L.K.
Locking the kink in the influenza hemagglutinin fusion domain structure.
J.Biol.Chem., 282:23946-23956, 2007

PubMed Abstract: We have previously identified Trp(14) as a critical residue that stabilizes the kink in the boomerang structure of the influenza fusion domain and found that cells expressing hemagglutinin with a Trp(14) to Ala mutation cannot fuse with red blood cells. However, mutating another aromatic residue, Phe(9), on the other side of the kink did not have a significant effect on fusion or the ability of the mutant fusion peptide to bind to or perturb the bilayer structure of lipid model membranes. We reasoned that Phe is not as potent to contribute to the kink as the larger Trp and that the cooperation of Phe(9) and Ile(10) might be needed to elicit the same effect. Indeed, the double mutant F9A/I10A diminished cell-cell fusion and the ability of the fusion domain to bind to and perturb lipid bilayers in a similar fashion as the W14A mutant. A structure determination of F9A in lipid micelles by solution NMR shows that F9A adopts a similarly kinked structure as wild type. Distances between the two arms of the boomerang structure of wild type, F9A, W14A, and F9A/I10A in lipid bilayers were measured by double electron-electron resonance spectroscopy and showed that the kinks of W14A and F9A/I10A are more flexible than those of wild type and F9A. These results underscore the importance of large hydrophobic residues on both sides of the kink region of the influenza hemagglutinin fusion domain to fix the angle of the boomerang structure and thereby confer fusion function to this critical domain.

PubMed: 17567572
DOI: 10.1074/jbc.M704008200

実験手法

SOLUTION NMR