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首页> 外文期刊>Acta crystallographica.Section D. Biological crystallography >Crystallization and preliminary X-ray diffraction analysis of the red fluorescent protein eqFP611.
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Crystallization and preliminary X-ray diffraction analysis of the red fluorescent protein eqFP611.

机译:结晶和初步的x射线衍射红色荧光蛋白eqFP611分析。

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摘要

A novel red fluorescent protein, eqFP611, from the sea anemone Entacmaea quadricolor has been cloned in Escherichia coli. With excitation and emission maxima at 559 and 611 nm, this protein shows the most red-shifted emission and the largest Stokes shift of all non-modified proteins in the green fluorescent protein (GFP) family. The protein fluoresces over a wide pH range (4-10) with high quantum yield (0.45). Its photophysical properties make eqFP611 an excellent marker protein for in vivo labeling in eukaryotic systems as was shown by expression in a mammalian cell culture. eqFP611 has been crystallized in space group P6(5)22, with unit-cell parameters a = b = 77.26, c = 329.49 A. The unit cell contains 12 asymmetric units, with two monomers in each. A molecular-replacement solution has been obtained using the 48.4% homologous red fluorescent protein from Discosoma coral (DsRed).
机译:一种新型红色荧光蛋白,eqFP611,从海葵Entacmaea quadricolor被克隆在大肠杆菌。最大值在559和611海里,这种蛋白质显示了最大最红移辐射和斯托克斯所有非转基因蛋白质的绿色转变荧光蛋白(GFP)的家庭。会发出荧光在pH值范围宽(十)高量子产率(0.45)。属性使eqFP611一个优秀的标志蛋白在真核生物体内标记系统在哺乳动物表达所示细胞培养。空间群P6(5) 22日,晶胞参数A = b = 77.26, c = 329.49。12不对称单位,有两个单体。molecular-replacement解决方案获得了使用48.4%同源红色荧光蛋白质从Discosoma珊瑚(域)。

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