rs63581460

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1PP4_ModeratePM2

This summary comes from the ClinGen Evidence Repository: PAH-specific ACMG/AMP criteria applied: PM2: Absent from ExAC, gnomAD, 1000G, ESP; PVS1: Frameshift variant; PP4_Moderate: Reported in patients with PAH deficiency. Bh4 defects excluded. (PMID:9634518). In summary this variant meets criteria to be classified as pathogenic for phenylketonuria in an autosomal recessive manner based on the ACMG/AMP criteria applied as specified by the PAH Expert Panel: (PM2, PVS1, PP4_Moderate). LINK:https://erepo.genome.network/evrepo/ui/classification/CA229279/MONDO:0009861/006

Frequency

Genomes: not found (cov: 32)
Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

PAH
NM_000277.3 frameshift

Scores

Not classified

Clinical Significance

Pathogenic reviewed by expert panel P:6O:1

Conservation

PhyloP100: 7.91
Variant links:
Genes affected
PAH (HGNC:8582): (phenylalanine hydroxylase) This gene encodes a member of the biopterin-dependent aromatic amino acid hydroxylase protein family. The encoded phenylalanine hydroxylase enzyme hydroxylates phenylalanine to tyrosine and is the rate-limiting step in phenylalanine catabolism. Deficiency of this enzyme activity results in the autosomal recessive disorder phenylketonuria. [provided by RefSeq, Aug 2017]

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PVS1
For more information check the summary or visit ClinGen Evidence Repository.
PM2
For more information check the summary or visit ClinGen Evidence Repository.
PP4
For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
PAHNM_000277.3 linkuse as main transcriptc.1024del p.Ala342HisfsTer58 frameshift_variant 10/13 ENST00000553106.6 NP_000268.1
PAHNM_001354304.2 linkuse as main transcriptc.1024del p.Ala342HisfsTer58 frameshift_variant 11/14 NP_001341233.1

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
PAHENST00000553106.6 linkuse as main transcriptc.1024del p.Ala342HisfsTer58 frameshift_variant 10/131 NM_000277.3 ENSP00000448059 P1

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
AF:
6.84e-7
AC:
1
AN:
1461430
Hom.:
0
Cov.:
31
AF XY:
0.00
AC XY:
0
AN XY:
727042
show subpopulations
Gnomad4 AFR exome
AF:
0.00
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
9.00e-7
Gnomad4 OTH exome
AF:
0.00
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Pathogenic
Submissions summary: Pathogenic:6Other:1
Revision: reviewed by expert panel
LINK: link

Submissions by phenotype

Phenylketonuria Pathogenic:5
Pathogenic, criteria provided, single submitterclinical testingCounsylJun 03, 2016- -
Pathogenic, criteria provided, single submitterclinical testingBaylor GeneticsMay 01, 2023- -
Pathogenic, reviewed by expert panelcurationClinGen PAH Variant Curation Expert PanelAug 10, 2018PAH-specific ACMG/AMP criteria applied: PM2: Absent from ExAC, gnomAD, 1000G, ESP; PVS1: Frameshift variant; PP4_Moderate: Reported in patients with PAH deficiency. Bh4 defects excluded. (PMID:9634518). In summary this variant meets criteria to be classified as pathogenic for phenylketonuria in an autosomal recessive manner based on the ACMG/AMP criteria applied as specified by the PAH Expert Panel: (PM2, PVS1, PP4_Moderate). -
Pathogenic, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpAug 12, 2021For these reasons, this variant has been classified as Pathogenic. This sequence change creates a premature translational stop signal (p.Ala342Hisfs*58) in the PAH gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in PAH are known to be pathogenic (PMID: 1301187, 9634518). This variant is not present in population databases (ExAC no frequency). This variant has been observed in individual(s) with phenylketonuria (PMID: 26503515, 26600521). This variant is also known as c.1023del (p.A342Hfs*59). ClinVar contains an entry for this variant (Variation ID: 102475). -
Pathogenic, criteria provided, single submitterclinical testingWomen's Health and Genetics/Laboratory Corporation of America, LabCorpNov 15, 2023Variant summary: PAH c.1024delG (p.Ala342HisfsX58) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. Variants downstream of this position have been classified as pathogenic by our laboratory. The variant was absent in 251246 control chromosomes. c.1024delG has been reported in the literature in individuals affected with Phenylalanine Hydroxylase Deficiency (Phenylketonuria) (e.g. Guldber_1998, Li_2015, Zhu_2013, Liu_2015). These data indicate that the variant is likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 9634518, 26503515, 23932990, 26600521). Four submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. All submitters classified the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -
not provided Pathogenic:1Other:1
not provided, no classification providedliterature onlyDeBelle Laboratory for Biochemical Genetics, MUHC/MCH RESEARCH INSTITUTE-- -
Pathogenic, criteria provided, single submitterclinical testingGeneDxMar 28, 2017The c.1024delG pathogenic variant has been reported previously in association with PKU (Guldberg et al., 1998; Liu et al., 2015). The deletion causes a frameshift starting with codon Alanine 342, changes this amino acid to a Histidine residue and creates a premature Stop codon at position 58 of the new reading frame, denoted p.Ala342HisfsX58. This pathogenic variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs63581460; hg19: chr12-103238154; API