Overview:
PIK3C2B or phosphatidylinositol-4-phosphate 3-kinase, catalytic subunit type 2 beta belongs to the phosphoinositide 3-kinase (PI3K) family. PIK3C2B plays a role in signaling pathways involved in cell proliferation, oncogenic transformation, cell survival, cell migration, and intracellular protein trafficking. PIK3C2B is highly expressed in thymus and placenta and it may function in a calcium-independent manner (1). In cell signaling, PIK3C2B stabilizes nucleotide-free Ras and the interaction of Ras and PI3KC2beta mutually inhibits one another activity (2).
Gene Aliases:
C2-PI3K
Genbank Number:
BC144342
References:
1. Brown, R. A.et.al: Identification and cDNA cloning of a novel mammalian C2 domain-containing phosphoinositide 3-kinase, HsC2-PI3K. Biochem. Biophys. Res. Commun. 233: 537-544, 1997.2. Wong KA. et.al: A new dimension to Ras function: a novel role for nucleotide-free Ras in Class II phosphatidylinositol 3-kinase beta (PI3KC2β) regulation. PLoS One. 2012;7(9):e45360. doi: 10.1371/journal.pone.0045360. Epub 2012 Sep 13.
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我在做5RACE,选用TaKaRa公司的RNA反转录酶(RNaseH-),不知道这个酶好不好,有什么需要注意的。
没有序列识别的功能,他就是简单的催化相邻DNA链的5-P末端和3'-OH末端以磷酸二酯键结合的反应,需ATP作辅酶。 不仅可以催化粘性末端之间或平滑末端之间的DNA的连接,也催化DNA与RNA之间以及少数RNA之间的连接。
反转录酶(Reversetranscripatase)是以RNA为模板指导三磷酸脱氧核苷酸合成互补DNA(cDNA)的酶。哺乳类C型病毒的反转录酶和鼠类B型病毒的反转录酶都是一条多肽链。鸟类RNA病毒的反转录酶则由两上亚基结构。真核生物中也都分离出具有不同结构的反转录酶。

