6J2R

Crystal structure of Striga hermonthica HTL8 (ShHTL8)

6J2R の概要

• エントリーDOI: 10.2210/pdb6j2r/pdb
• 分子名称: Hyposensitive to light 8, GLYCEROL (3 entities in total)
• 機能のキーワード: striga hermonthica, htl8, plant protein
• 由来する生物種: Striga hermonthica (Purple witchweed)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 30212.47

構造登録者

Zhang, Y.Y.,Xi, Z. (登録日: 2019-01-02, 公開日: 2020-01-15, 最終更新日: 2023-11-22)

主引用文献

Zhang, Y.,Wang, D.,Shen, Y.,Xi, Z.
Crystal structure and biochemical characterization of Striga hermonthica HYPO-SENSITIVE TO LIGHT 8 (ShHTL8) in strigolactone signaling pathway.
Biochem.Biophys.Res.Commun., 523:1040-1045, 2020

PubMed Abstract: Striga is a parasitic weed that disperses easily, and its seeds can persist in the soil for many years, presenting long-term threats to food security. If SLs stimulate the seed germination of root parasitic weeds before planting, weeds will wither due to no host. Therefore, it is necessary to determine the mechanism of strigolactone (SL) signaling in Striga to reduce the impacts of this parasitic weed. Striga has eleven different kinds of HYPO-SENSITIVE to LIGHT (ShHTL) hydrolases. Different ShHTL hydrolases exhibit distinct responses to SLs, despite these ShHTLs exhibiting more than 60% sequence identity. Currently, structural information is available for only five ShHTL proteins, and more structural information is needed to design Striga germination stimulants or inhibitors. In this paper, we report the crystal structure of ShHTL8, which is determined at a resolution of 1.4 Å. Scanning fluorimetry and HPLC assays indicate that L125, M147, M154 and I194 are important binding sites, and of which L125 may act as a key holder involved in the catalytic reaction. Additionally, the corresponding residue, Y124 of ShHTL1 and F135 of ShHTL2 also play a significant role in the substrate recognition.

PubMed: 31973817
DOI: 10.1016/j.bbrc.2020.01.056

実験手法

X-RAY DIFFRACTION (1.4 Å)