Distinct molecular forms of beta-catenin are targeted to adhesive or transcriptional complexes.
Distinct molecular forms of beta-catenin are targeted to adhesive or transcriptional complexes.
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DOI:
10.1083/jcb.200402153
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发表时间:
2004-10-25
期刊:
影响因子:
--
通讯作者:
Gumbiner BM
中科院分区:
文献类型:
--
作者:
Gottardi CJ;Gumbiner BM
β-Catenin plays essential roles in both cell–cell adhesion and Wnt signal transduction, but what precisely controls β-catenin targeting to cadherin adhesive complexes, or T-cell factor (TCF)-transcriptional complexes is less well understood. We show that during Wnt signaling, a form of β-catenin is generated that binds TCF but not the cadherin cytoplasmic domain. The Wnt-stimulated, TCF-selective form is monomeric and is regulated by the COOH terminus of β-catenin, which selectively competes cadherin binding through an intramolecular fold-back mechanism. Phosphorylation of the cadherin reverses the TCF binding selectivity, suggesting another potential layer of regulation. In contrast, the main cadherin-binding form of β-catenin is a β-catenin–α-catenin dimer, indicating that there is a distinct molecular form of β-catenin that can interact with both the cadherin and α-catenin. We propose that participation of β-catenin in adhesion or Wnt signaling is dictated by the regulation of distinct molecular forms of β-catenin with different binding properties, rather than simple competition between cadherins and TCFs for a single constitutive form. This model explains how cells can control whether β-catenin is used independently in cell adhesion and nuclear signaling, or competitively so that the two processes are coordinated and interrelated.
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影响因子:
7.8
作者:
Hinck, L;Nelson, W J;Papkoff, J
通讯作者:
Papkoff, J
DOI:
10.1083/jcb.123.6.1857
发表时间:
1993-12
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bradley RS;Cowin P;Brown AM
通讯作者:
Brown AM
DOI:
10.1083/jcb.153.5.1049
发表时间:
2001-05-28
期刊:
The Journal of cell biology
影响因子:
--
作者:
Gottardi CJ;Wong E;Gumbiner BM
通讯作者:
Gumbiner BM
影响因子:
11.4
作者:
Hecht, A;Vleminckx, K;Kemler, R
通讯作者:
Kemler, R
影响因子:
4.8
作者:
Hecht, A;Litterst, CM;Kemler, R
通讯作者:
Kemler, R