Inactive Type II and Type I Receptors for TGFβ Are Dominant Inhibitors of TGFβ-dependent Transcription (*)
Inactive Type II and Type I Receptors for TGFβ Are Dominant Inhibitors of TGFβ-dependent Transcription (*)
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TGFβ 的无活性 II 型和 I 型受体是 TGFβ 依赖性转录的主要抑制剂 (*)
DOI:
--
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发表时间:
1995
影响因子:
4.8
通讯作者:
M. Schneider
中科院分区:
文献类型:
--
作者:
T. Brand;M. Schneider
Although transforming growth factor-β (TGFβ) is implicated in differentiation and disease, proof of in vivo function requires specific inhibitors of the TGFβ cascade. TGFβ binds a family of type I and type II receptors (TβRI, TβRII), containing a cytoplasmic serine/threonine kinase domain. We previously reported that kinase-deficient TβRII (ΔkTβRII) blocks TGFβ-dependent transcription in cardiac myocytes. It is controversial whether both receptors are needed in all cells for gene regulation by TGFβ or whether they mediate distinct subsets of TGFβ-dependent events. To resolve this uncertainty, TGFβ-dependent transcription was investigated in cardiac myocytes versus mink lung epithelial cells. 1) ΔkTβRII inhibits induction of a TGFβ-responsive reporter gene, in both cell backgrounds. 2) Charged-to-alanine mutations of key residues of the TβRII kinase, including consensus ATP binding and amino acid recognition motifs, are competent for binding but not transcriptional activation. Each inactive receptor inhibits TGFβ-dependent transcription in both cell types. 3) Kinase-deficient TβRI (ΔkTβRI) likewise impairs TGFβ-dependent transcription, less completely than ΔkTβRII; kinase-deficient activin type I receptor has no effect. 4) TGFβ-binding proteins in cardiac cells and Mv1Lu cells are comparable by affinity labeling and immunoprecipitation; however, Mv1Lu cells express up to 3-fold higher levels of TβRII and TβRI. Thus, the model inferred from TGFβ-resistant cell lines (that TβRII and TβRI are necessary in tandem for the TGFβ-signaling complex to regulate transcription) is valid for cardiac myocytes, the cell type most prominently affected in TGFβ-deficient animals.
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影响因子:
2.9
作者:
Rolband,GC;Williams,JF;Webster,NJ;Hsu,D;Olefsky,JM
通讯作者:
Olefsky,JM
DOI:
10.1073/pnas.91.17.7957
发表时间:
1994-08
影响因子:
11.1
作者:
J. Xu;K. Matsuzaki;K. Mckeehan;F. Wang;M. Kan;W. Mckeehan
通讯作者:
J. Xu;K. Matsuzaki;K. Mckeehan;F. Wang;M. Kan;W. Mckeehan
DOI:
10.1073/pnas.90.11.5237
发表时间:
1993
影响因子:
11.1
作者:
Sellheyer,K;Bickenbach,JR;Rothnagel,JA;Bundman,D;Longley,MA;Krieg,T;Roche,NS;Roberts,AB;Roop,DR
通讯作者:
Roop,DR
影响因子:
10.5
作者:
PIERCE, DF;JOHNSON, MD;MOSES, HL
通讯作者:
MOSES, HL
影响因子:
56.9
作者:
KIMCHI, A;WANG, XF;MASSAGUE, J
通讯作者:
MASSAGUE, J