Download MendeleyStructure and inhibition analysis of the mouse SAD-B C-terminal fragment
Ma, H., Wu, J.X., Wang, J., Wang, Z.X., Wu, J.W.(2016) Biosci Biotechnol Biochem
- PubMed: 27251228
- DOI: https://doi.org/10.1080/09168451.2016.1191331
- Primary Citation of Related Structures:
5IRI - PubMed Abstract:
The SAD (synapses of amphids defective) kinases, including SAD-A and SAD-B, play important roles in the regulation of neuronal development, cell cycle, and energy metabolism. Our recent study of mouse SAD-A identified a unique autoinhibitory sequence (AIS), which binds at the junction of the kinase domain (KD) and the ubiquitin-associated (UBA) domain and exerts autoregulation in cooperation with UBA. Here, we report the crystal structure of the mouse SAD-B C-terminal fragment including the AIS and the kinase-associated domain 1 (KA1) at 2.8 Å resolution. The KA1 domain is structurally conserved, while the isolated AIS sequence is highly flexible and solvent-accessible. Our biochemical studies indicated that the SAD-B AIS exerts the same autoinhibitory role as that in SAD-A. We believe that the flexible isolated AIS sequence is readily available for interaction with KD-UBA and thus inhibits SAD-B activity.
Organizational Affiliation:
a MOE Key Laboratory of Protein Sciences and Tsinghua-Peking Center for Life Sciences , School of Life Sciences, Tsinghua University , Beijing , China.
