Crystal structure of a transcriptionally active Smad4 fragment.Qin, B., Lam, S.S., Lin, K.
(1999) Structure 7: 1493-1503
- PubMed: 10647180
- DOI: https://doi.org/10.1016/s0969-2126(00)88340-9
- Primary Citation of Related Structures:
- PubMed Abstract:
Smad4 functions as a common mediator of transforming growth factor beta (TGF-beta) signaling by forming complexes with the phosphorylated state of pathway-restricted SMAD proteins that act in specific signaling pathways to activate transcription. SMAD proteins comprise two domains, the MH1 and MH2 domain, separated by a linker region. The transcriptional activity and synergistic effect of Smad4 require a stretch of proline-rich sequence, the SMAD-activation domain (SAD), located N-terminal of the MH2 domain. To understand how the SAD contributes to Smad4 function, the crystal structure of a fragment including the SAD and MH2 domain (S4AF) was determined.
Department of Pharmacology and Molecular Toxicology, University of Massachusetts Medical School, Worcester 01655, USA.