4M46

Crystal structure of a green-emitter native of Lampyris turkestanicus luciferase

4M46 の概要

• エントリーDOI: 10.2210/pdb4m46/pdb
• 関連するPDBエントリー: 3QYA
• 分子名称: Luciferase (2 entities in total)
• 機能のキーワード: bioluminescence, oxidoreductase activity, monooxygenase, atp binding, oxidoreductase, luciferin-binding, light emitting
• 由来する生物種: Lampyris turkestanicus (Iranian firefly)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 64114.68

構造登録者

Sharafian, Z.,Hosseinkhani, S.,Naderi-manesh, H. (登録日: 2013-08-06, 公開日: 2013-10-30, 最終更新日: 2023-09-20)

主引用文献

Kheirabadi, M.,Sharafian, Z.,Naderi-Manesh, H.,Heineman, U.,Gohlke, U.,Hosseinkhani, S.
Crystal structure of native and a mutant of Lampyris turkestanicus luciferase implicate in bioluminescence color shift.
Biochim.Biophys.Acta, 1834:2729-2735, 2013

PubMed Abstract: Firefly bioluminescence reaction in the presence of Mg(2+), ATP and molecular oxygen is carried out by luciferase. The luciferase structure alterations or modifications of assay conditions determine the bioluminescence color of firefly luciferase. Among different beetle luciferases, Phrixothrix hirtus railroad worm emits either yellow or red bioluminescence color. Sequence alignment analysis shows that the red-emitter luciferase from Phrixothrix hirtus has an additional arginine residue at 353 that is absent in other firefly luciferases. It was reported that insertion of Arg in an important flexible loop350-359 showed changes in bioluminescence color from green to red and the optimum temperature activity was also increased. To explain the color tuning mechanism of firefly luciferase, the structure of native and a mutant (E354R/356R/H431Y) of Lampyris turkestanicus luciferase is determined at 2.7Å and 2.2Å resolutions, respectively. The comparison of structure of both types of Lampyris turkestanicus luciferases reveals that the conformation of this flexible loop is significantly changed by addition of two Arg in this region. Moreover, its surface accessibility is affected considerably and some ionic bonds are made by addition of two positive charge residues. Furthermore, we noticed that the hydrogen bonding pattern of His431 with the flexible loop is changed by replacing this residue with Tyr at this position. Juxtaposition of a flexible loop (residues 351-359) in firefly luciferase and corresponding ionic and hydrogen bonds are essential for color emission.

PubMed: 24103420
DOI: 10.1016/j.bbapap.2013.09.022

実験手法

X-RAY DIFFRACTION (2.7 Å)