Reaction catalyzed by sphingosine N-acyltransferase (2.3.1.24), very-long-chain ceramide synthase (2.3.1.297), sphingoid base N-stearoyltransferase (2.3.1.299)

		+			=			+		CoA
	sphinganine	+		stearoyl-CoA	=		N-stearoylsphinganine	+		CoA