Mediates 1-deoxy-D-xylulose (DX) phosphorylation in the cytoplasm prior to the translocation of 1-deoxy-D-xylulose 5-phosphate into plastids. Can also phosphorylate D-xylulose (Xyl). Uses preferentially ATP as cosubstrate. ATP + D-xylulose = ADP + D-xylulose 5-phosphate + H(+) Repressed by oxo-clomazone (keto-clomazone), a bleaching herbicide. Optimum temperature is 40 degrees Celsius (at pH 8). Active from 10 to 50 degrees Celsius. Isoprenoid biosynthesis; carotenoid biosynthesis. Impaired xylulose kinase activity in cytoplasm. Hypersensitivity to D-xylulose (Xyl) leading to reduced seeds germination. Loss of remediation of photosynthetic pigments after oxo-clomazone-mediated bleaching, thus leading to albino plants. Belongs to the FGGY kinase family.