YDA — Arabidopsis thaliana

Summary

AT1G63700, also known as YDA, YODA, MAPKKK4 or EMB71, encodes a mitogen-activated protein kinase kinase kinase (MAPKKK) with MEKK and protein serine/threonine kinase activity (EC 2.7.11.25). This Arabidopsis thaliana gene on chromosome 1 is associated with asymmetric stem cell division, cell fate determination, meristem development, organogenesis, cytokinesis, and cell polarization. It is linked to flavone and ethene metabolism, chlorophyll a anabolism, and inhibition of brassinosteroid-mediated signalling. The protein localises to the cell cortex, plasma membrane, cytoplasm, vesicle and nucleus. YDA is associated with numerous traits including seed weight and size, plant height, root length and thickness, leaf shape and curling, flowering time, germination rate, water use efficiency, disease tolerance, salt tolerance, anthocyanin content, auxin content and sensitivity, brassinosteroid sensitivity, and abscisic acid sensitivity. Studies of a related gene in rice link the family to microtubule stability.