ATP + L-rhamnulose = ADP + H(+) + L-rhamnulose 1-phosphate L-rhamnopyranose = L-rhamnulose Binds 1 Mn(2+) ion per subunit. Carbohydrate degradation; L-rhamnose degradation; glycerone phosphate from L-rhamnose: step 1/3. Carbohydrate degradation; L-rhamnose degradation; glycerone phosphate from L-rhamnose: step 2/3. In the N-terminal section; belongs to the rhamnulokinase family. In the C-terminal section; belongs to the rhamnose isomerase family.