Proteins
Curated comments from UniProt
Type | Comment | Proteins |
---|---|---|
WOX9_ARATH | developmental stage | First detected in the basal daughter cell of the zygote (PubMed:14711878). Unlike WOX2 and WOX8, it is not expressed in the egg cell or the zygote (PubMed:14711878). During two subsequent rounds of transverse cell divisions, it is restricted to the hypophysis (PubMed:14711878). At the 8-cell stage, it expands into the central domain of the embryo, in addition to weakening in the hypophysis (PubMed:14711878). After protoderm formation, expression in the central embryo domain is restricted to the protodermal cells and also disappears from the hypophyseal cell (PubMed:14711878). In subsequent stages, a ring of expression remains at the presumptive boundary between root and hypocotyl, at about the same position as WOX2 expression in heart stage embryos (PubMed:14711878). In addition to its embryonic expression, it is expressed postembryonically in the epidermal cells of the placenta during gynoecium development, but not in the developing ovules (PubMed:14711878). The placental expression disappears soon after fertilization (PubMed:14711878). Expression dynamics require MP and BDL, but not GN activity (PubMed:14711878). Detected as early as the first zygotic division in both the apical and the basal daughter cells (PubMed:17706632). By late globular to early transition stage, the protein is evenly distributed through out the embryo and the suspensor (PubMed:17706632). The basal half of the embryo, especially cells in the protoderm layer, starts to show slightly higher levels of expression by early heart stage (PubMed:17706632). |
WOX9_ARATH | function | Homeodomain transcription factor required for meristem growth and early development (PubMed:15753038). Promotes cell proliferation and prevents premature differentiation in meristematic tissues during postembryonic development (PubMed:15753038). Essential for maintaining tissue growth during embryogenesis (PubMed:17706632). May act by repressing TSS to promote meristematic proliferation (PubMed:21185286). Involved in the transcriptional activation of a subset of cytokinin response factors (PubMed:20110319). May act as a negative regulator of cytokinin signaling in the dark (PubMed:21057190). |
A0A178VQA8_ARATH WOX9_ARATH | similarity | Belongs to the WUS homeobox family. |
WOX9_ARATH | tissue specificity | Expressed in the basal cell and later at the boundary between suspensor and proembryo (PubMed:14711878). Expressed at low levels in proliferating tissues post embryonically (PubMed:15753038). Detected in vegetative shoot apical meristem, leaf primordia, floral meristems, emerging floral organs, epidermal layer of the placenta and in the upper portion of the root meristematic zone (PubMed:15753038, PubMed:20110319). |
Function
Gene Ontology
cellular component | |
---|---|
nucleus | ECO |
cytoplasm | ECO |
molecular function | |
DNA-binding transcription factor activity | ECO |
transcription cis-regulatory region binding | ECO |
biological process | |
positive regulation of cell population proliferation | ECO |
regulation of meristem growth | ECO |
embryo development ending in seed dormancy | ECO |