Evidence Repository - Clinical Genome Resources

The ClinGen Evidence Repository is an FDA-recognized human genetic variant database containing expert-curated assertions regarding variants' pathogenicity and supporting evidence summaries. [Disclaimer]

Variant: NM_000277.1:c.224A>G

CA16020750

619158 (ClinVar)

Gene: PAH (HGNC:5053)

Condition: phenylketonuria (MONDO:0009861)

Inheritance Mode: Autosomal recessive inheritance

UUID: ed279f84-6b13-4f46-a481-787bc75a8fc2

Approved on: 2018-12-10

Published on: 2018-12-10

HGVS expressions

NM_000277.1:c.224A>G

NC_000012.12:g.102894863T>C

CM000674.2:g.102894863T>C

NC_000012.11:g.103288641T>C

CM000674.1:g.103288641T>C

NC_000012.10:g.101812771T>C

NG_008690.1:g.27740A>G

NG_008690.2:g.68548A>G

NM_000277.2:c.224A>G

NM_001354304.1:c.224A>G

NM_000277.3:c.224A>G

ENST00000307000.7:c.209A>G

ENST00000546844.1:c.224A>G

ENST00000548677.2:n.311A>G

ENST00000548928.1:n.146A>G

ENST00000549111.5:n.320A>G

ENST00000550978.6:n.208A>G

ENST00000551337.5:c.224A>G

ENST00000551988.5:n.313A>G

ENST00000553106.5:c.224A>G

Likely Pathogenic

PP4_Moderate PM2 PM5

PP3

Evidence Links 2

Expert Panel

Phenylketonuria VCEP

Criteria Specification Information

Criteria Specifications for this VCEP

Evidence submitted by expert panel

Phenylketonuria VCEP

The c.224A>G (p.Asp75Gly) variant in PAH is reported in 1 Chinese PKU patient. BH4 deficiency was assessed. (PMID: 26503515) It is absent from ExAC, gnomAD, 1000G, and ESP. Computational evidence is conflicting. Another missense change at this amino acid is interpreted as likely pathogenic by our PAH VCEP, c.224A>T (p.Asp75Val). In summary, this variant meets criteria to be classified as likely pathogenic for PAH. PAH-specific ACMG/AMP criteria applied: PM2, PM5, PP4.

PP4_Moderate

Found in 1 Chinese PKU patient. BH4 deficiency assessed. PMID: 26503515

A total of 796 unrelated patients from 29 separate newborn screening centres of China were enrolled. These patients were diagnosed at birth either through a neonatal screening program or based on clinical presentation. Biochemical testing data, including plasma phenylalanine (Phe) levels, dihydropteridine reductase activity, urinary biopterin and neopterin ratio, and tetrahydrobiopterin loading, were collected. D75G reported on 1 allele. PubMed:26503515

A standard group of 15 samples with previously known DNA sequences and a test group of 37 HPA patients with unknown mutations were used for assay validation and application, respectively. All variations were confirmed by Sanger sequencing. Patient C24 with BH4D carrying p.?/IVS3 + 1G N A and p.Pro87Ser in PTS also had the heterozygous missense variation c. 224A>G (p.Asp75Gly) in PAH. PubMed:25456745

PM2

Absent from ExAC, gnomAD, 1000G, ESP

PM5

c.224A>T (p.Asp75Val) is interpreted as LP by our PAH VCEP.

PP3

Conflicting predictions of pathogenicity. SIFT, Polyphen2: benign; MutationTaster: disease causing. REVEL=0.454

Curation History

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