PSAT1

phosphoserine aminotransferase 1

Gene Function

Involved in L-serine biosynthesis via the phosphorylated pathway, a three-step pathway converting the glycolytic intermediate 3-phospho-D-glycerate into L-serine. Catalyzes the second step, that is the pyridoxal 5'-phosphate-dependent transamination of 3-phosphohydroxypyruvate and L-glutamate to O-phosphoserine (OPS) and alpha-ketoglutarate. Acts as an inhibitor of ferroptosis in response to interferon-gamma (IFNG) by promoting GPX4 stability: following phosphorylation by CAMK2A, PSAT1 interacts with GPX4 and provides 2-oxoglutarate to EGLN3, leading to GPX4 hydroxylation and stability Source: UniProt

Relationship to CMT

Unclassified AD, AR
1 subtype
9q21.2
First described 2023

Subtype Inheritance Class OMIM Sentinel Publication
SubtypeCMT-PSAT1 Inheritanceautosomal dominant or autosomal recessive ClassUnclassified Subtypes OMIMn/a Sentinel Publication

2023 · 10.1016/j.pediatrneurol.2022.11.013

Stored Identifiers

HGNC Aliases: PSAT
hgnc_idHGNC:19129
ensembl_gene_idENSG00000135069
coords_grch38chr9:78297094-78356024
coords_grch37chr9:80912059-80945009
entrez_id29968
omim_gene610936
uniprot_idsQ9Y617
refseq_accessionNM_021154
mane_refseqNM_058179.4
mane_ensemblENST00000376588.4

ClinVar Variants

Pathogenic and likely pathogenic variants in PSAT1, 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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