sphinganine-1-phosphate metabolic process sphinganine-1-phosphate biosynthetic process sphinganine-1-phosphate formation GO:0006669 sphinganine-1-phosphate synthesis dihydrosphingosine-1-phosphate biosynthetic process sphinganine-1-phosphate anabolism sphinganine-1-phosphate biosynthesis The chemical reactions and pathways resulting in the formation of sphinganine-1-phosphate, the phosphorylated derivative of D-erythro-2-amino-1,3-octadecanediol. dihydrosphingosine-1-phosphate biosynthesis biological_process phospholipid biosynthetic process sphingolipid biosynthetic process