Serine Palmitoyltransferase, Long Chain Base Subunit 1 (SPTLC1) Antibody – Rabbit Polyclonal

This gene encodes a member of the class-II pyridoxal-phosphate-dependent aminotransferase family. The encoded protein is the long chain base subunit 1 of serine palmitoyltransferase. Serine palmitoyltransferase converts L-serine and palmitoyl-CoA to 3-oxosphinganine with pyridoxal 5'-phosphate and is the key enzyme in sphingolipid biosynthesis. Mutations in this gene were identified in patients with hereditary sensory neuropathy type 1. Alternatively spliced variants encoding different isoforms have been identified. Pseudogenes of this gene have been defined on chromosomes 1, 6, 10, and 13. [provided by RefSeq, Jul 2013]

SPTLC1: Serine palmitoyltransferase (SPT). The heterodimer formed with SPTLC2 or SPTLC3 constitutes 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. Defects in SPTLC1 are the cause of hereditary sensory and autonomic neuropathy type 1A (HSAN1A). The hereditary sensory and autonomic neuropathies are a genetically and clinically heterogeneous group of disorders characterized by degeneration of dorsal root and autonomic ganglion cells, and by sensory and/or autonomic abnormalities. HSAN1A is an autosomal dominant axonal neuropathy with onset in the second or third decades. Initial symptoms are loss of pain, touch, heat, and cold sensation over the feet, followed by distal muscle wasting and weakness. Loss of pain sensation leads to chronic skin ulcers and distal amputations. Belongs to the class-II pyridoxal-phosphate-dependent aminotransferase family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Transferase; Lipid Metabolism - sphingolipid; EC 2.3.1.50; Membrane protein, integral

Chromosomal Location of Human Ortholog: 9q22.2

Cellular Component: endoplasmic reticulum membrane; integral to membrane

Molecular Function: protein binding; serine C-palmitoyltransferase activity; pyridoxal phosphate binding

Biological Process: sphingolipid metabolic process; sphingolipid biosynthetic process; sphingosine biosynthetic process; ceramide biosynthetic process; sphinganine biosynthetic process; sphingomyelin biosynthetic process

Disease: Neuropathy, Hereditary Sensory And Autonomic, Type Ia