Download MendeleyMolecular mechanism of strigolactone perception by DWARF14
Nakamura, H., Xue, Y.-L., Miyakawa, T., Hou, F., Qin, H.-M., Fukui, K., Shi, X., Ito, E., Ito, S., Park, S.-H., Miyauchi, Y., Asano, A., Totsuka, N., Ueda, T., Tanokura, M., Asami, T.(2013) Nat Commun 4: 2613-2613
- PubMed: 24131983
- DOI: https://doi.org/10.1038/ncomms3613
- Primary Citation of Related Structures:
3VXK, 3WIO - PubMed Abstract:
Strigolactones (SLs) are phytohormones that inhibit shoot branching and function in the rhizospheric communication with symbiotic fungi and parasitic weeds. An α/β-hydrolase protein, DWARF14 (D14), has been recognized to be an essential component of plant SL signalling, although its precise function remains unknown. Here we present the SL-dependent interaction of D14 with a gibberellin signalling repressor SLR1 and a possible mechanism of phytohormone perception in D14-mediated SL signalling. D14 functions as a cleavage enzyme of SLs, and the cleavage reaction induces the interaction with SLR1. The crystal structure of D14 shows that 5-hydroxy-3-methylbutenolide (D-OH), which is a reaction product of SLs, is trapped in the catalytic cavity of D14 to form an altered surface. The D14 residues recognizing D-OH are critical for the SL-dependent D14-SLR1 interaction. These results provide new insight into crosstalk between gibberellin and SL signalling pathways.
Organizational Affiliation:
1] Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan [2].
