SPTLC2

serine palmitoyltransferase long chain base subunit 2

Gene 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. Crucial for adipogenesis (By similarity) Source: UniProt

Relationship to CMT

HSANHSN AD
2 subtypes
14q24.3
First described 2010

Subtype Inheritance Class OMIM Sentinel Publication
SubtypeHSAN-1C Inheritanceautosomal dominant ClassHSAN OMIM613640 Sentinel Publication

2010 · 10.1016/j.ajhg.2010.09.010
SubtypeHSN-1C Inheritanceautosomal dominant ClassHSN OMIM613640 Sentinel Publication

2010 · 10.1016/j.ajhg.2010.09.010

Stored Identifiers

No HGNC Aliases
hgnc_idHGNC:11278
ensembl_gene_idENSG00000100596
coords_grch38chr14:77505997-77616781
coords_grch37chr14:77972340-78083116
entrez_id9517
omim_gene605713
uniprot_idsO15270
refseq_accessionNM_004863
mane_refseqNM_004863.4
mane_ensemblENST00000216484.7

ClinVar Variants

Pathogenic and likely pathogenic variants in SPTLC2, as classified in ClinVar, are read live from NCBI. Only aggregate germline records are shown. Uncertain and conflicting classifications are not. Experts in CMT makes no claim to the accuracy of ClinVar data. This index is provided for informational purposes only.

Review stars are ClinVar’s measure of how well a classification is supported: four for a practice guideline, three for an expert panel review, two for agreement among multiple submitters, one for a single submitter with criteria provided, and none where no criteria were provided.

Reported in CMT
Reported in Other Diseases

Reported in a disease other than CMT. Listed apart rather than counted as CMT variants.

Variants w/o a Recorded Disease

Pathogenic or likely pathogenic in ClinVar, submitted without a disease recorded.

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