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    • 40. 发明申请
    • Methods and compositions for modulating tumor suppression
    • 用于调节肿瘤抑制的方法和组合物
    • US20030166230A1
    • 2003-09-04
    • US10107521
    • 2002-03-25
    • Yoshihiro Nakatani
    • A61K038/46C07H021/04C12N009/22C12P021/02C12N005/06
    • C07K14/4736A61K38/00C07K14/47
    • The purification of native RB (retinoblastoma) as a complex, including P107, P130, and a 600 kDa subunit, termed MTAF600 (microtubule associated factor 600) is described. MTAF600 binds to RB regardless of the phosphorylation status of RB, and binds to RB without disrupting the interaction between RB and E2F. It is further shown that E2F and DP proteins co-purified with MTAF600 and RB, such that hypophosphorylated RB may gain access to E2F as a complex with MTAF600. In addition, MTAF600 binds to microtubules and plays a role in active repression of E2F-responsive genes, cell cycle arrest, and genomic stability. The sequence of MTAF600 is described herein, along with its binding properties to proteins such as RB and microtubules, and its sequence homology. Further, methods and reagents for assaying the presence of MTAF600 or mutants thereof, pharmaceutical formulations, and methods for treating disease are also described.
    • 描述了天然RB(视网膜母细胞瘤)作为复合物的纯化,包括P107,P130和称为MTAF600(微管相关因子600)的600kDa亚基。 无论RB的磷酸化状态如何,MTAF600与RB结合,并结合RB而不中断RB和E2F之间的相互作用。 进一步显示E2F和DP蛋白与MTAF600和RB共同纯化,使得低磷酸化的RB可以获得与MTAF600复合物的E2F的接触。 此外,MTAF600与微管结合,并在E2F反应基因的活性抑制,细胞周期停滞和基因组稳定性中发挥作用。 本文描述了MTAF600的序列,以及其与蛋白质如RB和微管的结合特性及其序列同源性。 此外,还描述了用于测定MTAF600或其突变体的存在的方法和试剂,药物制剂和用于治疗疾病的方法。