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PSAT1

Chr 9q21.2

phosphoserine aminotransferase 1

Aliases:
PSA, PSAT
MANE:
ENST00000376588.4

Annotations refreshed 1 month ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • DDG2P

    BIALLELIC, autosomal or pseudoautosomal
  • Fetal anomalies

    BIALLELIC, autosomal or pseudoautosomal
  • Likely inborn error of metabolism

    BIALLELIC, autosomal or pseudoautosomal
  • Skeletal dysplasia

    BIALLELIC, autosomal or pseudoautosomal
  • Undiagnosed metabolic disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Early onset or syndromic epilepsy

  • Childhood onset dystonia, chorea or related movement disorder

  • Clefting

    BIALLELIC, autosomal or pseudoautosomal

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Disease associations (Open Targets)

  • Neu-Laxova syndrome 2

    0.81
  • Phosphoserine aminotransferase deficiency

    0.68
  • Neu-Laxova syndrome

    0.63
  • PSAT deficiency

    0.62
  • neurometabolic disorder due to serine deficiency

    0.44
  • Neu-Laxova syndrome 1

    0.37
  • type 2 diabetes mellitus

    0.31
  • smoking initiation

    0.27
  • heart disorder

    0.25
  • bronchial disorder

    0.23

Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.

Protein function (UniProt)

Phosphoserine aminotransferase

Involved in L-serine biosynthesis via the phosphorylated pathway, a three-step pathway converting the glycolytic intermediate 3-phospho-D-glycerate into L-serine (PubMed:36851825, PubMed:37627284). 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 (PubMed:36851825, PubMed:37627284). 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 (PubMed:40281343)

Data sources: HGNC (CC BY 4.0), AlphaFold (CC BY 4.0, Jumper et al. Nature 2021), Genomics England PanelApp (CC BY 4.0), ClinGen, Open Targets (CC0), UniProt.

Not for sole clinical decision-making. Always verify against primary sources.