TGIF1 homeodomain interacts with Smad MH1 domain and represses TGF-β signaling.
TGIF1 homeodomain interacts with Smad MH1 domain and represses TGF-β signaling.
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DOI:
10.1093/nar/gky680
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发表时间:
2018-09-28
影响因子:
14.9
通讯作者:
Macias MJ
中科院分区:
文献类型:
--
作者:
Guca E;Suñol D;Ruiz L;Konkol A;Cordero J;Torner C;Aragon E;Martin-Malpartida P;Riera A;Macias MJ
TGIF1 is a multifunctional protein that represses TGF-β-activated transcription by interacting with Smad2-Smad4 complexes. We found that the complex structure of TGIF1–HD bound to the TGACA motif revealed a combined binding mode that involves the HD core and the major groove, on the one hand, and the amino-terminal (N-term) arm and the minor groove of the DNA, on the other. We also show that TGIF1–HD interacts with the MH1 domain of Smad proteins, thereby indicating that TGIF1–HD is also a protein-binding domain. Moreover, the formation of the HD-MH1 complex partially hinders the DNA-binding site of the complex, preventing the efficient interaction of TGIF1–HD with DNA. We propose that the binding of the TGIF1 C-term to the Smad2-MH2 domain brings both the HD and MH1 domain into close proximity. This local proximity facilitates the interaction of these DNA-binding domains, thus strengthening the formation of the protein complex versus DNA binding. Once the protein complex has been formed, the TGIF1-Smad system would be released from promoters/enhancers, thereby illustrating one of the mechanisms used by TGIF1 to exert its function as an active repressor of Smad-induced TGF-β signaling.
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影响因子:
16.6
作者:
Martin-Malpartida P;Batet M;Kaczmarska Z;Freier R;Gomes T;Aragón E;Zou Y;Wang Q;Xi Q;Ruiz L;Vea A;Márquez JA;Massagué J;Macias MJ
通讯作者:
Macias MJ
影响因子:
3.8
作者:
El-Jaick, Kenia B.;Powers, Shannon E.;Muenke, Maximilian
通讯作者:
Muenke, Maximilian
影响因子:
10.5
作者:
Aragon, Eric;Goerner, Nina;Macias, Maria J.
通讯作者:
Macias, Maria J.
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
影响因子:
14.9
作者:
Blanchet C;Pasi M;Zakrzewska K;Lavery R
通讯作者:
Lavery R