Zhao_2015_Cell.Res_25_1219

Reference

Title : Destabilization of strigolactone receptor DWARF14 by binding of ligand and E3-ligase signaling effector DWARF3 - Zhao_2015_Cell.Res_25_1219
Author(s) : Zhao LH , Zhou XE , Yi W , Wu Z , Liu Y , Kang Y , Hou L , de Waal PW , Li S , Jiang Y , Scaffidi A , Flematti GR , Smith SM , Lam VQ , Griffin PR , Wang Y , Li J , Melcher K , Xu HE
Ref : Cell Res , 25 :1219 , 2015
Abstract :

Strigolactones (SLs) are endogenous hormones and exuded signaling molecules in plant responses to low levels of mineral nutrients. Key mediators of the SL signaling pathway in rice include the alpha/beta-fold hydrolase DWARF 14 (D14) and the F-box component DWARF 3 (D3) of the ubiquitin ligase SCF(D3) that mediate ligand-dependent degradation of downstream signaling repressors. One perplexing feature is that D14 not only functions as the SL receptor but is also an active enzyme that slowly hydrolyzes diverse natural and synthetic SLs including GR24, preventing the crystallization of a binary complex of D14 with an intact SL as well as the ternary D14/SL/D3 complex. Here we overcome these barriers to derive a structural model of D14 bound to intact GR24 and identify the interface that is required for GR24-mediated D14-D3 interaction. The mode of GR24-mediated signaling, including ligand recognition, hydrolysis by D14, and ligand-mediated D14-D3 interaction, is conserved in structurally diverse SLs. More importantly, D14 is destabilized upon the binding of ligands and D3, thus revealing an unusual mechanism of SL recognition and signaling, in which the hormone, the receptor, and the downstream effectors are systematically destabilized during the signal transduction process.

PubMedSearch : Zhao_2015_Cell.Res_25_1219
PubMedID: 26470846
Gene_locus related to this paper: orysj-Q10QA5

Related information

Inhibitor GR24
Substrate GR24
Gene_locus orysj-Q10QA5
Structure 5DJ5

Citations formats

Zhao LH, Zhou XE, Yi W, Wu Z, Liu Y, Kang Y, Hou L, de Waal PW, Li S, Jiang Y, Scaffidi A, Flematti GR, Smith SM, Lam VQ, Griffin PR, Wang Y, Li J, Melcher K, Xu HE (2015)
Destabilization of strigolactone receptor DWARF14 by binding of ligand and E3-ligase signaling effector DWARF3
Cell Res 25 :1219

Zhao LH, Zhou XE, Yi W, Wu Z, Liu Y, Kang Y, Hou L, de Waal PW, Li S, Jiang Y, Scaffidi A, Flematti GR, Smith SM, Lam VQ, Griffin PR, Wang Y, Li J, Melcher K, Xu HE (2015)
Cell Res 25 :1219