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Iodine

Company: HiMedia Laboratories
Catalog#: GRM1064
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In vitro Chaperone Activity Assay Using α-Amylase as Target Protein
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2018-06-20
[Abstract]  Small heat shock proteins (sHSP) are stress proteins which are ubiquitously found in almost all living organisms. They function as molecular chaperones, which assist in protein folding during translation and in the prevention of irreversible protein aggregation under denaturing conditions. This protocol describes the use of α-amylase as target protein in assessing the chaperone activity of wild and mutant recombinant small heat shock proteins of Mycobacterium leprae. Chaperone activity of these proteins, along with α-crystallin, a standard sHSP was demonstrated using a new method employing their protective effect against heat denaturation of α-amylase from porcine pancreas. The regained enzymatic activity of the α-amylase was demonstrated on starch agar plates stained with ... [摘要]  小热休克蛋白(sHSP)是在几乎所有生物体中无处不在发现的应激蛋白。 它们作为分子伴侣起作用,这有助于在翻译过程中蛋白质折叠以及在变性条件下预防不可逆的蛋白质聚集。 该协议描述了使用α-淀粉酶作为靶蛋白来评估麻风分枝杆菌的野生和突变重组小热休克蛋白的分子伴侣活性。 这些蛋白质的陪伴分子活性以及标准sHSP的α-晶状体蛋白通过采用其对猪胰α-淀粉酶的热变性的保护作用的新方法被证实。 在用碘 - 碘化钾(I 2 -KI)溶液染色的淀粉琼脂平板上证实α-淀粉酶的重新酶活性。

【背景】热休克蛋白(HSPs)是一组保守的蛋白质,当细胞暴露于外部应激(包括热应激和冷应激)时诱导蛋白质。该组中的大多数成员在功能上与蛋白质折叠和解折叠机制有关。小热休克蛋白(sHSPs)是热休克蛋白的子集,其分子大小为12至43kDa,并且保守的C末端区域称为'α-晶域'。 sHSP通过与部分未折叠的蛋白结合并阻止其完全变性而显示ATP非依赖性分子伴侣活性。有几种用于证明sHSPs的体外伴侣蛋白活性的方法,其使用各种底物蛋白如RuBisCO(Goloubinoff等人,1989),rhodanese(Mendoza等人(Farahbakhsh等,1995),溶菌酶(Rozema和Gellman,1996),苹果酸脱氢酶(Lee等, ...

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