酶显色底物ADP-ribose-pNP是美国AAT Bioquest生产的用于过氧化物酶的试剂，ADP-核糖-pNP是用来评估多聚ADP-核糖聚合酶（PARP）活性的一种显色底物。在405nm处可检测释放的p-硝基酚吸光度。标准曲线的斜率通常用来转换产生的ADP-核糖-pNP比色底物的的吸光度。使用ADP-核糖-pNP作为显色底物，PARP-1具有大Km和Vmax数值（分别为151 uM和1.30nmolmin-1mg-1），其次是Tankyrase-1(82uM和18pmolmin-1mg-l)和VPARP（46uM和2 pmolmin-1mg-l）。显色底物通常用来决定PARP-1,tankyrase-1和VPARP 的动力学参数，然后筛选PARP-1,tankyrase-1和VPARP小分子抑制剂。由于ADP-核糖-pNP连续实验分析比标准的非连续PARP试验更有优势，因此其可用于高通量筛选PARP-1,tankyrase-1和VPARP的活性以及相关抑制剂。金畔生物是AAT Bioquest的中国代理商，为您提供优质的酶显色底物ADP-ribose-pNP。 

适用仪器

样品实验方案 

溶液制备 

1.储备溶液

所有未使用的储备溶液应分成一次性等分试样，并在制备后储存在-20°C。 避免反复冻融循环。
1.1 ADP-核糖-pNP原液：
在H₂O中制备5-10mM的储备溶液。 注意：应立即使用原液。

2.工作溶液

ADP-核糖-pNP工作溶液：
通过用测定缓冲液（50mM Tris，10mM MgCl 2，pH 8.0）稀释储备溶液来制备0.25mM测定溶液。

样品操作步骤

1.将0.01mL /孔的样品溶液加入0.09mL /孔测定溶液中，使96孔透明板中的终体积为0.1mL。

2.使用吸光度酶标仪在405nm处监测平板。

参考文献

A colorimetric substrate for poly(ADP-ribose) polymerase-1, VPARP, and tankyrase-1
Authors: Nottbohm AC, Dothager RS, Putt KS, Hoyt MT, Hergenrother PJ.
Journal: Angew Chem Int Ed Engl (2007): 2066

Pharmacological identification of P2X1, P2X4 and P2X7 nucleotide receptors in the smooth muscles of human umbilical cord and chorionic blood vessels
Authors: Valdecantos P, Briones R, Moya P, Germain A, Huidobro-Toro JP.
Journal: Placenta (2003): 17

Poly(ADP-ribose) polymerase as a key player in excitotoxicity and post-ischemic brain damage
Authors: Meli E, Pangallo M, Baronti R, Chiarugi A, Cozzi A, Pellegrini-Giampietro DE, Moroni F.
Journal: Toxicol Lett (2003): 153

Interactions of nucleotide cofactors with the Escherichia coli replication factor DnaC protein
Authors: Galletto R, Rajendran S, Bujalowski W.
Journal: Biochemistry (2000): 12959

Kinetic mechanism of nucleotide cofactor binding to Escherichia coli replicative helicase DnaB protein. stopped-flow kinetic studies using fluorescent, ribose-, and base-modified nucleotide analogues
Authors: Bujalowski W, Jezewska MJ.
Journal: Biochemistry (2000): 2106

Effects of caffeine and adenine nucleotides on Ca2+ release by the sarcoplasmic reticulum in saponin-permeabilized frog skeletal muscle fibres
Authors: Duke AM, Steele DS.
Journal: J Physiol (1998): 43

Adenine nucleotides regulate ADP-ribosylation of membrane-bound actin and actin-binding to membranes
Authors: Schroeder P, Just I, Aktories K.
Journal: Eur J Cell Biol (1994): 3

Trimeric G-proteins of the trans-Golgi network are involved in the formation of constitutive secretory vesicles and immature secretory granules
Authors: Barr FA, Leyte A, Mollner S, Pfeuffer T, Tooze SA, Huttner WB.
Journal: FEBS Lett (1991): 239

Inhibition and labeling of the Ca2(+)-ATPase from sarcoplasmic reticulum by periodate oxidized ATP
Authors: Mignaco J, Scofano HM, Barrabin H.
Journal: Biochim Biophys Acta (1990): 305