| Function | Component of the serine palmitoyltransferase multisubunit enzyme (SPT) that catalyzes the initial and rate-limiting step in sphingolipid biosynthesis by condensing L-serine and activated acyl-CoA (most commonly palmitoyl-CoA) to form long-chain bases. The SPT complex is composed of SPTLC1, SPTLC2 or SPTLC3 and SPTSSA or SPTSSB. Within this complex, the heterodimer consisting of SPTLC1 and SPTLC2/SPTLC3 forms the catalytic core. The composition of the serine palmitoyltransferase (SPT) complex determines the substrate preference. The SPTLC1-SPTLC2-SPTSSA complex shows a strong preference for C16-CoA substrate, while the SPTLC1-SPTLC3-SPTSSA isozyme uses both C14-CoA and C16-CoA as substrates, with a slight preference for C14-CoA. The SPTLC1-SPTLC2-SPTSSB complex shows a strong preference for C18-CoA substrate, while the SPTLC1-SPTLC3-SPTSSB isozyme displays an ability to use a broader range of acyl-CoAs, without apparent preference. |
| Protein Name | Serine Palmitoyltransferase 3Long Chain Base Biosynthesis Protein 2bLcb2bLong Chain Base Biosynthesis Protein 3Lcb 3Serine-Palmitoyl-Coa Transferase 3Spt 3 |
| Database Links | Reactome: R-HSA-1660661 |
| Cellular Localisation | Endoplasmic Reticulum MembraneSingle-Pass Membrane Protein |
| Alternative Antibody Names | Anti-Serine Palmitoyltransferase 3 antibodyAnti-Long Chain Base Biosynthesis Protein 2b antibodyAnti-Lcb2b antibodyAnti-Long Chain Base Biosynthesis Protein 3 antibodyAnti-Lcb 3 antibodyAnti-Serine-Palmitoyl-Coa Transferase 3 antibodyAnti-Spt 3 antibodyAnti-SPTLC3 antibodyAnti-C20orf38 antibodyAnti-SPTLC2L antibody |
Information sourced from Uniprot.org
