SPA4 (SPA1-RELATED 4); signal transducer. similar to SPA3 (SPA1-RELATED 3), signal transducer [Arabidopsis thaliana] (TAIR:AT3G15354.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO39286.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO69753.1); similar to hypothetical protein OsI_003524 [Oryza sativa (indica cultivar-group)] (GB:EAY75677.1); contains InterPro domain WD40 repeat-like (InterPro:IPR011046); contains InterPro domain Protein kinase, core; (InterPro:IPR000719); contains InterPro domain WD40/YVTN repeat-like (InterPro:IPR015943); contains InterPro domain Protein kinase-like (InterPro:IPR011009); contain