Room temperature crystal structure of the fast switching M159T mutant of the fluorescent protein dronpa.

Room temperature crystal structure of the fast switching M159T mutant of the fluorescent protein dronpa.
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DOI:
10.1002/prot.24742
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发表时间:
2015-03
影响因子:
2.9
通讯作者:
Van Thor, Jasper J.
Van Thor, Jasper J.
中科院分区:
生物学4区
文献类型:
--
作者:
Kaucikas, Marius;Fitzpatrick, Ann;Bryan, Elana;Struve, Abelone;Henning, Robert;Kosheleva, Irina;Srajer, Vukica;Groenhof, Gerrit;Van Thor, Jasper J.

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荧光蛋白Dronpa通过光异构化和质子转移反应,在亮‘开’和暗‘关’状态之间进行可逆光开关反应。报道了Dronpa的快速开关Met159Thr突变体在亮开状态下的室温晶体结构。与野生型的结构差异包括含有Thr159的链β8的骨架位置移动,以及涉及链β7、β8、β10和β11的A-C二聚体界面改变。由于侧链和骨架位置的差异,Met159Thr突变增加了对羟基亚甲基-咪唑烷酮发色团的腔体积。
The fluorescent protein Dronpa undergoes reversible photoswitching reactions between the bright ‘on’ and dark ‘off’ states via photoisomerisation and proton transfer reactions. We report the room temperature crystal structure of the fast switching Met159Thr mutant of Dronpa at 2.0 Å resolution in the bright on state. Structural differences with the wild type include shifted backbone positions of strand β8 containing Thr159 as well as an altered A-C dimer interface involving strands β7, β8, β10, and β11. The Met159Thr mutation increases the cavity volume for the p-hydroxybenzylidene-imidazolinone chromophore as a result of both the side chain difference and the backbone positional differences.
DOI: 10.1107/s0907444910045749
发表时间: 2011-04
期刊: Acta crystallographica. Section D, Biological crystallography
影响因子: --
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