Serine palmitoyltransferase 1 (SPTLC1)

Serine palmitoyltransferase (SPT). The heterodimer formed with SPTLC2 or SPTLC3 represents the catalytic core.

The composition of this serine palmitoyltransferase (SPT) complex determines the substrate preference. The SPTLC1-SPTLC2-SPTSSA complex indicates a strong preference for C16-CoA substrate, while the SPTLC1-SPTLC3-SPTSSA isozyme utilizes both C14-CoA and C16-CoA as substrates, with a small preference for C14-CoA.