NM_003978.5:c.748G>A
Variant summary
Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PM2PM5PP3_ModeratePP5_Very_Strong
The NM_003978.5(PSTPIP1):c.748G>A(p.Glu250Lys) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E250Q) has been classified as Pathogenic.
Frequency
Consequence
NM_003978.5 missense
Scores
Clinical Significance
Conservation
Publications
- pyogenic arthritis-pyoderma gangrenosum-acne syndromeInheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae)
- autoinflammatory syndromeInheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
- recurrent infections-inflammatory syndrome due to zinc metabolism disorder syndromeInheritance: Unknown Classification: SUPPORTIVE Submitted by: Orphanet
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ACMG classification
Our verdict: Pathogenic. The variant received 14 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| PSTPIP1 | NM_003978.5 | c.748G>A | p.Glu250Lys | missense_variant | Exon 11 of 15 | ENST00000558012.6 | NP_003969.2 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| PSTPIP1 | ENST00000558012.6 | c.748G>A | p.Glu250Lys | missense_variant | Exon 11 of 15 | 1 | NM_003978.5 | ENSP00000452746.1 |
Frequencies
GnomAD3 genomes Cov.: 33
GnomAD4 exome Cov.: 31
GnomAD4 genome Cov.: 33
ClinVar
Submissions by phenotype
Pyogenic arthritis-pyoderma gangrenosum-acne syndrome Pathogenic:7Other:1
This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 250 of the PSTPIP1 protein (p.Glu250Lys). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with PAPA syndrome or hyperzincemia and hypercalprotectinemia (PMID: 22161697, 22513199, 25845478, 26025129). ClinVar contains an entry for this variant (Variation ID: 97810). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is expected to disrupt PSTPIP1 protein function with a positive predictive value of 80%. This variant disrupts the p.Glu250 amino acid residue in PSTPIP1. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 11971877, 16527883, 20506269, 22161697). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic.
A heterozygous missense variant, NM_003978.3(PSTPIP1):c.748G>A, has been identified in exon 11 of 15 of the PSTPIP1 gene. The variant is predicted to result in a amino acid change from glutamic acid to lysine at position 250 of the protein (NP_003969.2(PSTPIP1):p.(Glu250Lys)). The glutamic acid at this position has conservation (100 vertebrates, UCSC), and is located within the BAR superfamily domain. In silico predictions for this variant are consistently pathogenic (Polyphen, SIFT, CADD, Mutation Taster). The variant is absent in population databases (gnomAD, dbSNP, 1000G). The variant has been previously reported pathogenic in multiple patients with hypercalprotectinemia and hyperzincemia (Hz/Hc) (Holzinger, D. et al., 2015). It has also been shown de novo in at least 8 patients and inherited in one family (Holzinger, D. et al., 2015). Additionally, studies demonstrated it impacts protein function (Holzinger, D. et al., 2015). A different variant in the same codon resulting in a change to glutamine is known to cause the classic phenotype, PAPA syndrome (pyogenic sterile arthritis, pyoderma gangrenosum, and acne) (Holzinger, D. et al., 2015). Based on the information available at the time of curation, this variant has been classified as PATHOGENIC.
This variant was classified as: Pathogenic. The following ACMG criteria were applied in classifying this variant: PS1,PS3,PM2,PM5,PP3.
Absent from controls (or at extremely low frequency if recessive) in Genome Aggregation Database, Exome Sequencing Project, 1000 Genomes Project, or Exome Aggregation Consortium.;The prevalence of the variant in affected individuals is significantly increased compared to the prevalence in controls.;Assumed de novo, but without confirmation of paternity and maternity.;Novel missense change at an amino acid residue where a different missense change determined to be pathogenic has been seen before.;Patient's phenotype or family history is highly specific for a disease with a single genetic etiology.;Well-established in vitro or in vivo functional studies supportive of a damaging effect on the gene or gene product.
not provided Pathogenic:5
PM2_supporting, PS2, PS4
Published functional studies demonstrate altered function for E250K, with significantly increased binding to pyrin and an increase in phosphorylation by cABL, when compared to wild type (Holzinger et al., 2015); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 22161697, 28628471, 29150835, 26989109, 25845478, 26025129, 28832562, 31119601, 32441320, 28960754, 33256319, 32054657, 29453417, 33597285, 22513199)
Hyperzincemia and hypercalprotectinemia Pathogenic:2
The variant is not observed in the gnomAD v4.1.0 dataset. Predicted Consequence/Location: Missense variant. Missense changes are a common disease-causing mechanism. In silico tool predictions suggest damaging effect of the variant on gene or gene product [REVEL: 0.48 (>=0.6, sensitivity 0.68 and specificity 0.92); 3Cnet: 0.99 (>=0.6, sensitivity 0.72 and precision 0.9)]. The same nucleotide change resulting in the same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000097810 /PMID: 22513199). A different missense change at the same codon (p.Glu250Gln) has been reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000004434 /PMID: 11971877). Therefore, this variant is classified as Pathogenic according to the recommendation of ACMG/AMP guideline.
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at