Download MendeleyCrystal structure of the p38 alpha MAP kinase in complex with a docking peptide from TAB1
Xin, F.J., Wu, J.W.(2013) Sci China Life Sci 56: 653-660
- PubMed: 23722236
- DOI: https://doi.org/10.1007/s11427-013-4494-0
- Primary Citation of Related Structures:
4KA3 - PubMed Abstract:
The mitogen-activated protein kinase (MAPK) p38α is a key regulator in many cellular processes, whose activity is tightly regulated by upstream kinases, phosphatases and other regulators. Transforming growth factor-β activated kinase 1 (TAK1) is an upstream kinase in p38α signaling, and its full activation requires a specific activator, the TAK1-binding protein (TAB1). TAB1 was also shown to be an inducer of p38α's autophosphorylation and/or a substrate driving the feedback control of p38α signaling. Here we determined the complex structure of the unphosphorylated p38α and a docking peptide of TAB1, which shows that the TAB1 peptide binds to the classical MAPK docking groove and induces long-range conformational changes on p38α. Our structural and biochemical analyses suggest that TAB1 is a reasonable substrate of p38α, yet the interaction between the docking peptide and p38α may not be sufficient to trigger trans-autophosphorylation of p38α.
Organizational Affiliation:
Tsinghua-Peking Center for Life Sciences and MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China.
