serine C-palmitoyltransferase activity Reactome:REACT_96995 Reactome:REACT_116146 Reactome:REACT_96113 palmitoyl-CoA:L-serine C-palmitoyltransferase (decarboxylating) activity Reactome:REACT_97460 Reactome:REACT_97020 Reactome:REACT_32913 Reactome:REACT_19401 Reactome:REACT_96107 Reactome:REACT_89157 Reactome:REACT_90201 Reactome:REACT_102523 Reactome:REACT_78134 EC:2.3.1.50 molecular_function acyl-CoA:serine C-2 acyltransferase decarboxylating Reactome:REACT_109567 Catalysis of the reaction: L-serine + H(+) + palmitoyl-CoA = 3-dehydrosphinganine + CO(2) + CoA. MetaCyc:SERINE-C-PALMITOYLTRANSFERASE-RXN 3-oxosphinganine synthetase activity RHEA:14764 Reactome:REACT_86827 Reactome:REACT_113202 SPT Reactome:REACT_86656 serine palmitoyltransferase Reactome:REACT_102132 Reactome:REACT_107523 Reactome:REACT_93748 GO:0004758 KEGG:R01281 C-palmitoyltransferase activity