Name: highly sensitive and rapid fluorescence detection with a portable fret analyzer
Uploaded: 2016-10-01T13:00:00
Description: Watch this Scientific Journal Video about Highly Sensitive and Rapid Fluorescence Detection with a Portable FRET Analyzer at JoVE.com

这项研究是由赠款全球前沿项目（2011-0031944）和KRIBB研究计划项目的智能合成生物学中心的支持。

1.生物传感器的制备<ol><li>按照先前建立的协议2 CFP-MBP-YFP-的His6 -构建质粒pET21a（+）。 </li><li>接种5毫升的Luria肉汤（LB）的与大肠杆菌 DE3菌株的单个菌落，并在37°C孵育16小时振荡。 </li><li>传输1毫升的O / N培养物在含有100ml LB和在振荡培养箱中于37℃孵育直到在600nm（OD 600）的光密度达到0.5（约3小时）的500ml烧瓶中。 </li><li>在1,000×g下收获在50ml的锥形管中的细胞通过离心在4...

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G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+portable+FRET+analyzer+for+rapid+detection+of+sugar+content.">A portable FRET analyzer for rapid detection of sugar content.</a> Analyst. 140 (10), 3384-3389 (2015).</li><li>Gam, J., Ha, J. -. S., Kim, H., Lee, D. -. H., Lee, J., Lee, S. -. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ratiometric+analyses+at+critical+temperatures+can+magnify+the+signal+intensity+of+FRET-based+sugar+sensors+with+periplasmic+binding+proteins.">Ratiometric analyses at critical temperatures can magnify the signal intensity of FRET-based sugar sensors with periplasmic binding proteins.</a> Biosens. Bioelectron. 72, 37-43 (2015).</li><li>Hessels, A. 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该协议允许饮料样品中的糖含量的快速和有效的量化，使用定做的FRET分析器7在用于FRET传感器的最佳温度。分析器被设计用最近开发的，廉价的405纳米波段紫外LED作为光源和两个光检测器与硅光电二极管。这个装置是更符合成本效益比其它可比的荧光计。该器件显示高检测灵敏度，在最佳的温度范围为FRET传感器测量两个发射波长带（530纳米和480纳米）的比率特别时。它的灵敏度和强度检?...

荧光共振能量转移（FRET）已被广泛地用作生物统计传感器来检测小分子如糖，钙离子，氨基酸1-4。 FRET生物传感器含有荧光蛋白，青色荧光蛋白（国家重点计划）和黄色荧光蛋白（YFPs），其稠合到周质结合蛋白（的PBPs）的两端。糖类结合到位于FRET传感器的中间的PBPs，从而导致其随后改变在的PBPs的一端的两个荧光蛋白的距离和跃迁偶极取向传感器的结构变化。这种改变，通过测量EYFP（530纳米），ECFP（480纳米）的发光波长的比率使得能够糖含量的定量分析。由于高灵敏度，特异性，实时监测能力，和FRET生物传感器的响应时间快，这些传感器被广泛应用于环境，工业和医疗应用5。此外，比率式使用FRET生物传感器etric测量具有重要的实际的好处，因为它可以用来测量复杂生物样品，其中所述传感器的浓度不能被容易地控制和背景荧光总是存在于组件。 尽管基于FRET的传感器，用于定量可视化的这些优点，不完整的域名运动转移到荧光蛋白微小的结构性变化产生固有的弱信号强度。这个弱信号限制基于FRET的传感器，用于在体外或体内分析6的应用程序。因此，大多数FRET生物传感器需要使用昂贵的，高度敏感的设备。先前，我们开发了一种廉价和便携式FRET分析仪类似于现有荧光分析仪7的功能。在该装置中，廉价的405纳米波段紫外发光二极管（LED）作为光源，使第激发Ë荧光信号，更换昂贵的灯泡或激光。分析仪的检测系统的散热荧光信号高效率地聚焦到两个光电检测器与硅光电二极管。在最近的研究中，我们发现，在50检测温度的优化- 55°C可能显著放大比例FRET信号8。这个特定的温度信号增强，与定做的FRET分析仪一起使得能够快速且高灵敏度更一般诊断应用中的使用的FRET传感器。 在这个协议中，我们通过量化市售饮料的糖含量表现出最佳的FRET的温度条件下的FRET分析仪的通用性。这个协议提供了FRET设备操作的细节，以及传感器和样品制备的简要说明。我们预计，该报告将推动便携式的潜在应用分析器在小规模的实验室环境，并提供与基于FRET的生物传感器的廉价的现场诊断装置的进一步发展奠定了基础。

<table border="0" cellpadding="0" cellspacing="0" width="1297">
	<colgroup>
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		<col />
		<col />
		<col />
	</colgroup>
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">LB</td>
			<td style="width:191px;">BD</td>
			<td style="width:119px;">#244620</td>
			<td style="width:760px;"></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:227px;">isopropyl &#946;-D-thiogalactoside (IPTG)</td>
			<td style="width:191px;">Sigma</td>
			<td style="width:119px;">I6758</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">Ampicillin</td>
			<td style="width:191px;">Sigma</td>
			<td style="width:119px;">A9518</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">Tri-HCl</td>
			<td style="width:191px;">Bioneer</td>
			<td style="width:119px;">C-9006-1</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">PMSF</td>
			<td style="width:191px;">Sigma</td>
			<td style="width:119px;">78830</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">EDTA</td>
			<td style="width:191px;">Bioneer</td>
			<td style="width:119px;">C-9007</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">DTT</td>
			<td style="width:191px;">Sigma</td>
			<td style="width:119px;">D0632</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">NaCl</td>
			<td style="width:191px;">Junsei</td>
			<td style="width:119px;">19015-0350</td>
			<td></td>
		</tr>
		<tr height="25">
			<td height="25" style="height:25px;width:227px;">phosphate-buffered saline (PBS)</td>
			<td style="width:191px;">Gibco</td>
			<td style="width:119px;">70011-044</td>
			<td>0.8% NaCl, 0.02% KCl, 0.0144% Na2HPO4, 0.024% KH2OP4, pH 7.4</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">SOC</td>
			<td style="width:191px;"></td>
			<td style="width:119px;"></td>
			<td>2% tryptone, 0.5% Yeast extract, 10 mM NaCl, 2.5 mM KCl, 10 mM MGCl2, 20 mM Glucose</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">Resource Q</td>
			<td>Amersham Biosciences</td>
			<td style="width:119px;">17-1177-01</td>
			<td>6 &#215; 30 mm anion-exchange chromatography column&#160;</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">HisTrap HP1</td>
			<td>Amersham Biosciences</td>
			<td style="width:119px;">29-0510-21</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">Quartz cuvette</td>
			<td style="width:191px;">Sigma</td>
			<td style="width:119px;">Z802875</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">AK&#196;KTAFPLC</td>
			<td>Amersham Biosciences</td>
			<td style="width:119px;">18-1900-26</td>
			<td>a fast protein liquid chromatography (FPLC)</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Cary Eclipse</td>
			<td>VarianInc</td>
			<td style="width:119px;"></td>
			<td>a fluorescence spectrophotometer</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">VICTOR&#160;&#160;</td>
			<td style="width:191px;">PerkinElmer</td>
			<td style="width:119px;">2030-0050</td>
			<td>a multilabel plate reader</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">E. coli JM109 (DE3)</td>
			<td style="width:191px;">Promega</td>
			<td style="width:119px;"></td>
			<td>Electrocompetent cells</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">A (Beverage)</td>
			<td style="width:191px;">Korea Yakult Co. (Korea)</td>
			<td style="width:119px;">Birak</td>
			<td>Fermented drinks</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">B (Beverage)</td>
			<td style="width:191px;">Lotte Foods (Korea)</td>
			<td style="width:119px;">Epro</td>
			<td>Soft drink</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:227px;">C (Beverage)</td>
			<td style="width:191px;">Lotte Foods (Korea)</td>
			<td style="width:119px;">Getoray</td>
			<td>Sports drink</td>
		</tr>
	</tbody>
</table>

highly sensitive and rapid fluorescence detection with a portable fret analyzer

在荧光共振能量转移最近的改进（FRET）传感器已经使它们的使用，以检测各种小分子，包括离子和氨基酸。然而，FRET传感器的先天弱信号强度，以防止在各个领域的应用并使得使用昂贵的，高端的荧光计必要的一个重大挑战。先前，我们构建可以特异性测量两个发射波长带（530和480纳米）的比率，以实现高的检测灵敏度具有成本效益的，高性能的FRET分析仪。最近，人们发现FRET传感器与细菌周质结合蛋白检测用在临界温度范围的50最高灵敏度的配体 - 55℃。这份报告描述了使用我们的便携式FRET分析仪具有特定的温度-FRET传感器市售饮料样品评估中含糖量的协议。我们的结果表明，附加的预热FRET的传感器的过程显著增加的FRET比率信号，以使糖含量更精确的测量。定做的FRET分析仪和传感器成功地应用到量化糖含量在三种类型的商业饮料。我们预计，设备的尺寸进一步降低和性能的提高将有利于环境中使用手持式分析仪，其中高端装备不可用。

以执行使用FRET分析糖含量的定量分析，必须建立一个拟合曲线推定从观察的FRET比率目标糖浓度。设r定义CFP的发光强度的比在480nm和在530nm（式1）中产生的YFP的发光强度。 <img alt="式（1）" src="/files/ftp_upload/54144/54144equation1.jpg" />可以通过观察FRET比r，在不同的糖浓度来?...

Watch this Scientific Journal Video about Highly Sensitive and Rapid Fluorescence Detection with a Portable FRET Analyzer at JoVE.com

Highly Sensitive and Rapid Fluorescence Detection with a Portable FRET Analyzer

这个协议描述了使用定制便携式FRET分析器荧光共振能量转移（FRET）的传感器数据的快速且高灵敏度定量。该装置被用于最大化的检测灵敏度，有利的糖含量的实际和有效的评估的临界温度范围内检测麦芽糖。

高度敏感和快速荧光检测用便携式分析仪FRET

Recent improvements in F&#246;rster resonance energy transfer (FRET) sensors have enabled their use to detect various small molecules including ions and ...

Research

JoVE Journal

Biochemistry

High Precision FRET at Single-molecule Level for Biomolecule Structure Determination

单分子水平的高精度FRET用于生物分子结构测定

A protocol on how to perform high-precision interdye distance measurements using F&#246;rster resonance energy transfer (FRET) at the single-molecule ...

科研

生物化学

Regeneration of Arrayed Gold Microelectrodes Equipped for a Real-Time Cell Analyzer

用于实时细胞分析仪的阵列金电极再生

The label-free cell-based assay is advantageous for biochemical study because of it does not require the use of experimental animals. Due to its ability ...

Rab10 Phosphorylation Detection by LRRK2 Activity Using SDS-PAGE with a Phosphate-binding Tag

用磷酸盐结合标记的 SDS-页 Rab10 磷酸化检测 LRRK2 活性

Mutations in leucine-rich repeat kinase 2 (LRRK2) have been shown to be linked with familial Parkinson&#39;s disease (FPD). Since abnormal activation of ...

Highly Sensitive and Quantitative Detection of Proteins and Their Isoforms by Capillary Isoelectric Focusing Method

毛细管电聚焦法对蛋白质及其亚型的高灵敏度和定量检测

Immunoblotting has become a routine technique in many laboratories for protein characterization from biological samples. The following protocol provides ...

Detection of Detergent-sensitive Interactions Between Membrane Proteins

膜蛋白对洗涤剂敏感相互作用的检测

Our ability to explore protein-protein interactions is the key to understanding regulatory connections in the cell. However, detection of protein-protein ...

Detection of Small GTPase Prenylation and GTP Binding Using Membrane Fractionation and  GTPase-linked Immunosorbent Assay

膜分馏和 gtpase-关联免疫吸附法检测小 gtpase 预基化和 gtp 结合

The Rho GTPase family belongs to the Ras superfamily and includes approximately 20 members in humans. Rho GTPases are important in the regulation of ...

Rapid Fluorescence-based Characterization of Single Extracellular Vesicles in Human Blood with Nanoparticle-tracking Analysis

基于荧光的人体血液单细胞外囊快速表征

Extracellular vesicles (EVs), including exosomes, are specialized membranous nano-sized vesicles found in bodily fluids that are constitutively released ...

Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry

通过肽浓缩和质谱检测蛋白质泛化位点检测

The posttranslational modification of proteins by the small protein ubiquitin is involved in many cellular events. After tryptic digestion of ...

Study on the Metabolism of Six Systemic Insecticides in a Newly Established Cell Suspension Culture Derived from Tea (Camellia Sinensis L.) Leaves

Study on the Metabolism of Six Systemic Insecticides in a Newly Established Cell Suspension Culture Derived from Tea Camellia Sinensis L. Leaves

从茶中提取的新建细胞悬浮培养基中六种系统杀虫剂的代谢研究(山茶西宁西斯L.叶

A platform for studying insecticide metabolism using in vitro tissues of tea plant was developed. Leaves from sterile tea plantlets were induced to form ...

Extremely Rapid and Specific Metabolic Labelling of RNA In Vivo with 4-Thiouracil (Ers4tU)

Extremely Rapid and Specific Metabolic Labelling of RNA In Vivo with 4-Thiouracil Ers4tU

极快速和特殊的代谢标签的RNA在Vivo与4-Thiouracil （Ers4tU）

The nucleotide analogue, 4-thiouracil (4tU), is readily taken up by cells and incorporated into RNA as it is transcribed in vivo, allowing isolation of ...