NM_000277.3(PAH):c.609C>T (p.Cys203=) AND Phenylketonuria

Germline classification:: Uncertain significance (3 submissions)
Last evaluated:: Oct 23, 2020
Review status:: 3 stars out of maximum of 4 stars
reviewed by expert panel

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV001082797.13

Allele description [Variation Report for NM_000277.3(PAH):c.609C>T (p.Cys203=)]

NM_000277.3(PAH):c.609C>T (p.Cys203=)

Gene:

PAH:phenylalanine hydroxylase [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

12q23.2

Genomic location:

Preferred name:

NM_000277.3(PAH):c.609C>T (p.Cys203=)

HGVS:

NC_000012.12:g.102855233G>A
NG_008690.2:g.108178C>T
NM_000277.3:c.609C>TMANE SELECT
NM_001354304.2:c.609C>T
NP_000268.1:p.Cys203=
NP_001341233.1:p.Cys203=
NC_000012.11:g.103249011G>A
NM_000277.1:c.609C>T

Links:

dbSNP: rs1801147

NCBI 1000 Genomes Browser:

rs1801147

Molecular consequence:

NM_000277.3:c.609C>T - synonymous variant - [Sequence Ontology: SO:0001819]
NM_001354304.2:c.609C>T - synonymous variant - [Sequence Ontology: SO:0001819]

Condition(s)

Name:: Phenylketonuria (PKU)
Synonyms:: Phenylketonurias; Oligophrenia phenylpyruvica; Folling disease
Identifiers:: MONDO: MONDO:0009861; MedGen: C0031485; Orphanet: 716; OMIM: 261600

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001018718	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Likely benign (Jan 25, 2024)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV001272689	Illumina Laboratory Services, Illumina	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019)	Uncertain significance (Apr 27, 2017)	germline	clinical testing	Citation Link,
SCV001448224	ClinGen PAH Variant Curation Expert Panel	reviewed by expert panel (ClinGen PAH ACMG Specifications v1)	Uncertain significance (Oct 23, 2020)	germline	curation	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV001018718

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Likely benign
(Jan 25, 2024)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

SCV001272689

Illumina Laboratory Services, Illumina

criteria provided, single submitter

(ICSL Variant Classification Criteria 13 December 2019)

Uncertain significance
(Apr 27, 2017)

germline

clinical testing

Citation Link,

SCV001448224

ClinGen PAH Variant Curation Expert Panel

reviewed by expert panel

(ClinGen PAH ACMG Specifications v1)

Uncertain significance
(Oct 23, 2020)

germline

curation

Citation Link

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing, curation

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group, Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV001018718.6

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Illumina Laboratory Services, Illumina, SCV001272689.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

Description

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From ClinGen PAH Variant Curation Expert Panel, SCV001448224.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	curation	not provided

Description

The c.609C>T (p.Cys203=) variant in PAH has not been reported in a patient with PAH deficiency to our knowledge. This variant has a MAF that is too high (0.00473 in gnomAD). A deleterious effect is predicted using HSF, IIEs from Zhang et al, Fas-ESS hexamers, and NNSplice, but Splice AI predicts a benign effect (0). In summary, this variant meets criteria to be classified as uncertain significance for PAH. PAH-specific ACMG/AMP criteria applied: BS1.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Oct 20, 2024

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