Overview:
TRAF2 (also known as TNF receptor-associated factor 2) belongs to the TNF receptor associated factor (TRAF) protein family that mediates signal transduction from members of the TNF receptor superfamily (1). TRAF2 is involved in TNF-alpha-mediated activation of MAPK8/JNK and NF-kB pathway. TRAF2 interacts with TNF receptors and forms a heterodimeric complex with TRAF1. The TRAF1-TRAF2 complex interacts with IAPs to mediate the anti-apoptotic signals from TNF receptors. TRAF2 also interacts with TRADD, a TNF receptor associated apoptotic signal transducer, to ensure the recruitment of IAPs for the direct inhibition of caspase activation (2).
Gene Aliases:
TRAP, TRAP3, MGC: 45012
Genbank Number:
NM_021138
References:
1. Wajant, H. Et al: The TNF-receptor-associated factor family: scaffold molecules for cytokine receptors, kinases and their regulators.". Cell. Signal. 2001;13 (6): 389-400. 2. Bradley, J.R., Pober, J.S. Tumor necrosis factor receptor-associated factors (TRAFs).". Oncogene,2001; 20 (44): 6482-91
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1970科家致癌RNA病毒发现种特殊RNA病毒聚合酶,该酶能RNA模板,根据碱基互补原则.程与般病毒转录向相反,故称逆转录,催化程酶称逆转录酶,发现哺乳物胚胎细胞裂淋巴细胞含.
逆转录病毒称携带逆转录酶病毒,先侵入宿主细胞病毒RNA模板,靠酶形DNA环化,合宿主细胞染色体原病毒形式宿主细胞代代传.
HIV(艾滋病病毒)典型逆转录病毒
⒈通过嵌入DNA双链的碱基之间,形成稳定复合物,抑制DNA复制与RNA合成,从而阻碍快速生长的癌细胞的分裂。
⒉抑制拓扑异构酶II,影响DNA超螺旋转化成为松弛状态,从而阻碍DNA复制与转录。有研究显示拓扑异构酶II抑制剂(除蒽环类药物还包括依托泊苷等)能够阻止拓扑异构酶II的翻转,而这点对于它从它的核酸底物上脱离是必需的。这就意味着,拓扑异构酶II抑制剂使拓扑异构酶II的复合物在DNA链断裂之后才能更稳定,导致后者催化了DNA的破坏;同时,拓扑异构酶II抑制剂还能阻碍连接酶对DNA的修复。
⒊螯合铁离子后产生自由基从而破坏DNA、蛋白质及细胞膜结构。向左转|向右转
最近遇到了实验上的大问题,就是用一步法做RNA的荧光定量PCR时,发现低浓度的做不出来,而DNA是可以的,想请问各位在一步法PCR中有没有什么高见,就是逆转录的Buffer有没有什么需要注意的地方!就是在逆转录酶的最适Buffer和Taq酶的最适Buffer中寻找一个最适的Buffer!