Overview:
MELK or maternal embryonic leucine zipper kinase is a member of the CAMKL kinase family. MELK is a key regulator of the proliferation of malignant brain tumors including their stem cells (1). MELK transcript abundance correlates with malignancy grade in human astrocytomas and represents a therapeutic target for the management of the most frequent brain tumors in adult and children. MELK also plays a role in mammary carcinogenesis through inhibition of the pro-apoptotic function of Bcl-GL (2). Therefore, the kinase activity of MELK could be a promising molecular target for development of therapy for patients with breast cancers.
Gene Aliases:
HPK38, KIAA0175
Genbank Number:
NM_014791
References:
1. Nakano I. et.al: Maternal embryonic leucine zipper kinase (MELK) regulates multipotent neural progenitor proliferation. J Cell Biol 2005; 170: 413–27 2. Lin ML. et.al: Involvement of maternal embryonic leucine zipper kinase (MELK) in mammary carcinogenesis through interaction with Bcl-G, a pro-apoptotic member of the Bcl-2 family. Breast Cancer Res 2007; 9: R17.
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磷酸肌酸激酶(CPK),主要存在于骨骼肌和心肌,在脑组织中也存在,是参与体内的能量代谢的一种酶。在临床上主要用于诊断心肌梗塞。心肌梗塞患者发病后2-4小时,血液中此酶活动即开始升高。比血清中谷草转酸酶和乳酸脱氢酶的活力变化都出现得早。
临床意义:
(1)心肌梗塞后,CPK较谷草转氨酶和乳酸脱氢酶特异性高,但持续时间短,2-4天恢复正常。
(2)病毒性心肌炎,CPK也可升高,对诊断及预后有参考价值。
(3)进行性肌营养不良、多发性肌炎以及肌肉损伤时CPK也可升高。
(4)严重的心绞痛、心包炎、房颤、脑血管意外、脑膜炎以及心脏手术等,CPK可见升高。
大家好,有几个设计的药物分子需要测试活性,不知道谁能提供下能做相关测试服务的机构或个人信息不?非常感谢!
protease
水解蛋白质肽键的一类酶的总称。按其水解多肽的方式,可以将其分为内肽酶和外肽酶两类。内肽酶将蛋白质分子内部切断,形成分子量较小的月示和胨。外肽酶从蛋白质分子的游离氨基或羧基的末端逐个将肽键水解,而游离出氨基酸,前者为氨基肽酶后者为羧基肽酶。按其活性中心和最适pH值,又可将蛋白酶分为丝氨酸蛋白酶、巯基蛋白酶、金属蛋白酶和酸性蛋白酶。按其反应的最适pH值,分为酸性蛋白酶、中性蛋白酶和碱性蛋白酶。工业生产上应用的蛋白酶,主要是内肽酶。
蛋白激酶
protein kinase
又称蛋白质磷酸化酶(protein phosphakinase)。一类催化蛋白质磷酸化反应的酶。

