
Overview:
PRMT5 is a protein arginine methyltransferase and part of a 20S methyltransferase complex that modifies specific arginines to dimethylarginines in several spliceosomal Sm proteins (1). This modification targets Sm proteins to the survival of motor neurons (SMN) complex for assembly into small nuclear ribonucleoprotein core particles. MEP50 associates with PRMT5 in the 20S arginine methyltransferase complex in HeLa cells (2). Antibodies directed against MEP50 can reduce the arginine methyltransferase activity of the immunopurified complex toward Sm substrates. PRMT5-mediated transcriptional repression of reporter gene is dependent on MEP50.
Gene Aliases:
HRMT1L5; IBP72; JBP1; SKB1; SKB1Hs
Genbank Number:
NM_006109
References:
1. Friesen, W. J. et al: A novel WD repeat protein component of the methylosome binds Sm proteins. J. Biol. Chem. 277: 8243-8247, 2002.2. Furuno, K. et al: Association of Polycomb group SUZ12 with WD-repeat protein MEP50 that binds to histone H2A selectively in vitro. Biochem. Biophys. Res. Commun. 345: 1051-1058, 2006.
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补充一点的是有些病毒在人群中的感染是很普遍的,比如HCMV.对于这些病毒IgM的检测结果可以推测是否为近期感染.但这一类病毒其检测的临床意义经常是当其再激活感染时.比如:HCMV感染后就在末梢单个核细胞中潜伏起来,对于正常人而言是不致病的,但当出现HIV感染或应用免疫抑制剂时会出现激活感染而且经常导致严重疾患.对于这种再激活感染虽然也有IgM的升高,但是却在现在ELISA技术的检测限以下,因此是检测不到的,这时就必须进行针对其抗原的检测。
看了下说明书,上面没有具体说。感觉捕获抗体和酶标抗体需要对HCP有不同的结合位点才能形成稳定的抗体-HCP-抗体复合物。不知道有没有战友熟悉,求解惑,谢谢!
液体的一抗加50%甘油,-20度也不会冻结,可保存3-5年;
经常使用时取出一小份,4度可使用半年之久;
粉末状的二抗直接-20或-80度贮藏就行了。

