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_000277.2(PAH):c.974A>G (p.Tyr325Cys)

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Curation History
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CA220593

92756 (ClinVar)

Gene: PAH

Condition: phenylketonuria

Inheritance Mode: Autosomal recessive inheritance

Link to MONDO

UUID: beb6cce3-600e-4524-83f3-c01b699bc962

Approved on: 2020-02-23

Published on: 2020-02-23

HGVS expressions

NM_000277.2:c.974A>G

NM_000277.2(PAH):c.974A>G (p.Tyr325Cys)

NM_000277.1:c.974A>G

NM_001354304.1:c.974A>G

NM_000277.3:c.974A>G

NM_001354304.2:c.974A>G

ENST00000307000.7:c.959A>G

ENST00000549247.6:n.733A>G

ENST00000551114.2:n.636A>G

ENST00000553106.5:c.974A>G

ENST00000635477.1:n.78A>G

ENST00000635528.1:n.489A>G

NC_000012.12:g.102844427T>C

CM000674.2:g.102844427T>C

NC_000012.11:g.103238205T>C

CM000674.1:g.103238205T>C

NC_000012.10:g.101762335T>C

NG_008690.1:g.78176A>G

NG_008690.2:g.118984A>G

Likely Pathogenic

PP4_Moderate PM3 PM2 PP3

Evidence Links 4

Expert Panel

Phenylketonuria VCEP

Criteria Specification Information

Criteria Specifications for this VCEP

Evidence submitted by expert panel

Phenylketonuria VCEP

The c.974A>G (p.Tyr325Cys) variant in PAH has been reported in multiple individuals with PKU (BH4 deficiency excluded). It was detected with pathogenic/LP variants p.L194P (LP) PMID: 23430918 L348V (P) PMID: 10679941 p.P281L (LP) PMID: 22526846 p.R408W (P) with parental analysis not reported for 1.5 points. This variant has extremely low frequency in gnomAD (MAF=0.00001). Computational evidence supports a a deleterious effect. In summary, this variant meets criteria to be classified as likely pathogenic for PAH. PAH-specific ACMG/AMP criteria applied: PP4_Moderate, PM2, PM3, PP3.

PP4_Moderate

Single patient with Phe 480umol/L at dx. BH4 defect excluded with urine pterins and DHPR activity.

PubMed:22526846

PubMed:23430918

PubMed:10679941

PM3

identified with p.L194P (LP) PMID: 23430918 L348V (P 7 submitters) PMID: 10679941 p.P281L (LP) parental analysis not reported PMID: 22526846 p.R408W (P 14 submitters)

PubMed:24350308

PM2

Absent from ExAC, MAF=0.00001 in gnomAD.

PP3

In silico analysis supports deleterious effect. REVEL 0.992

Curation History

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