有啊。 Proc Natl Acad Sci U S A. 1995 Nov 21;92(24):11259-63. Signal-induced degradation of I kappa B alpha requires site-specific ubiquitination. Scherer DC, Brockman JA, Chen Z, Maniatis T, Ballard DW. Source The inhibitor protein I kappa B alpha controls the nuclear import of the transcription factor NF-kappa B. The inhibitory activity of I kappa B alpha is regulated from the cytoplasmic compartment by signal-induced proteolysis. Previous studies have shown that signal-dependent phosphorylation of serine residues 32 and 36 targets I kappa B alpha to the ubiquitin-proteasome pathway. Here we provide evidence that lysine residues 21 and 22 serve as the primary sites for signal-induced ubiquitination of I kappa B alpha. Conservative Lys-->Arg substitutions at both Lys-21 and Lys-22 produce dominant-negative mutants of I kappa B alpha in vivo. These constitutive inhibitors are appropriately phosphorylated but fail to release NF-kappa B in response to multiple inducers, including viral proteins, cytokines, and agents that mimic antigenic stimulation through the T-cell receptor. Moreover, these Lys-->Arg mutations prevent signal-dependent degradation of I kappa B alpha in vivo and ubiquitin conjugation in vitro. We conclude that site-specific ubiquitination of phosphorylated I kappa B alpha at Lys-21 and/or Lys-22 is an obligatory step in the activation of NF-kappa B.
【在 s******y 的大作中提到】 : 有啊。 : Proc Natl Acad Sci U S A. 1995 Nov 21;92(24):11259-63. : Signal-induced degradation of I kappa B alpha requires site-specific : ubiquitination. : Scherer DC, Brockman JA, Chen Z, Maniatis T, Ballard DW. : Source : The inhibitor protein I kappa B alpha controls the nuclear import of the : transcription factor NF-kappa B. The inhibitory activity of I kappa B alpha : is regulated from the cytoplasmic compartment by signal-induced proteolysis. : Previous studies have shown that signal-dependent phosphorylation of serine
1. CARMA3 deficiency abrogates G protein-coupled receptor-induced NF-κB activation Brian C. Grabiner1,5, Marzenna Blonska1,5, Pei-Chun Lin1, Yun You1, Donghai Wang4, Jiyuan Sun1, Bryant G. Darnay2, Chen Dong3, and Xin Lin1,6 2. MEKK3 is required for lysophosphatidic acid-induced NF-kappaB activation. Sun W, Li H, Yu Y, Fan Y, Grabiner BC, Mao R, Ge N, Zhang H, Fu S, Lin X, Yang J. 3. Bcl10 plays a critical role in NF-κB activation induced by G protein- coupled receptors Donghai Wang * , † , Yun You *, Pei-Chun Lin *, Liquan Xue ‡ , Stephan W. Morris ‡ , Hu Zeng § , Renren Wen § , and Xin Lin * ..........................
【在 a*****x 的大作中提到】 : 有没有reference?
a*x
20 楼
你是说ikBa的降解?老实说那个数据真的没有什么说服力。。。不过多谢了!
Donghai
【在 p*****e 的大作中提到】 : 1. : CARMA3 deficiency abrogates G protein-coupled receptor-induced NF-κB : activation : Brian C. Grabiner1,5, Marzenna Blonska1,5, Pei-Chun Lin1, Yun You1, Donghai : Wang4, Jiyuan Sun1, Bryant G. Darnay2, Chen Dong3, and Xin Lin1,6 : 2. : MEKK3 is required for lysophosphatidic acid-induced NF-kappaB activation. : Sun W, Li H, Yu Y, Fan Y, Grabiner BC, Mao R, Ge N, Zhang H, Fu S, Lin X, : Yang J. : 3.
p*e
21 楼
? Ok, see figure 4C in the following paper. The Lysophosphatidic Acid 2 Receptor Mediates Down-regulation of Siva-1 to Promote Cell Survival* Fang-Tsyr Lin ‡ 1 , Yun-Ju Lai ‡ 2 , Natalia Makarova § , Gabor Tigyi § and Weei-Chin Lin
【在 p*****e 的大作中提到】 : ? Ok, see figure 4C in the following paper. : The Lysophosphatidic Acid 2 Receptor Mediates Down-regulation of Siva-1 to : Promote Cell Survival* : Fang-Tsyr Lin ‡ 1 , Yun-Ju Lai ‡ 2 , Natalia Makarova § , Gabor : Tigyi § and Weei-Chin Lin