rs62514927

Positions:

chr12-102855231-T-C

Variant summary

Our verdict is Pathogenic. Variant got 7 ACMG points: 7P and 0B. PM3PP3PM2PP4_Moderate

This summary comes from the ClinGen Evidence Repository: The c.611A>G (p.Tyr204Cys) variant in PAH has been reported in multiple individuals with Classic PKU and MHP (BH4 deficiency excluded). (PMID:15503242). This variant has a MAF (0.00016) in gnomAD. This variant creates a fully active, novel 5 ́ donor splice site which results in an aberrantly spliced mRNA with a 96-nt deletion at the 3 ́-end of exon 6 PMID:8990021 (aka Ex6-96A>G). Multiple lines of computational evidence support a deleterious effect. This variant was detected in trans with multiple pathogenic variants including: p.R111* (2); c.442-1G>A; p.R158W; p.L255S; p.P281L; p.K363Nfs*37; p.V399V; p.R408W; p.R241C (2); p.R243Q; p.R261Q (2); p.S349A; p.R413P; p.A434D (2) (PMID:26322415). In summary, this variant meets criteria to be classified as pathogenic for PAH. PAH-specific ACMG/AMP criteria applied: PM2, PP4_Moderate, PM3_very-strong, PP3. LINK:https://erepo.genome.network/evrepo/ui/classification/CA229653/MONDO:0009861/006

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

PAH
NM_000277.3 missense

Scores

Clinical Significance

Pathogenic reviewed by expert panel P:9O:1

Conservation

PhyloP100: 4.92

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]

PAH links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 7 ACMG points.

PM2

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

PM3

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

PP3

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
PAH	NM_000277.3 linkuse as main transcript	c.611A>G	p.Tyr204Cys	missense_variant	6/13	ENST00000553106.6	NP_000268.1
PAH	NM_001354304.2 linkuse as main transcript	c.611A>G	p.Tyr204Cys	missense_variant	7/14		NP_001341233.1
PAH	XM_017019370.2 linkuse as main transcript	c.611A>G	p.Tyr204Cys	missense_variant	6/7		XP_016874859.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
PAH	ENST00000553106.6 linkuse as main transcript	c.611A>G	p.Tyr204Cys	missense_variant	6/13	1	NM_000277.3	ENSP00000448059	P1
PAH	ENST00000549111.5 linkuse as main transcript	n.707A>G		non_coding_transcript_exon_variant	6/6	1
PAH	ENST00000307000.7 linkuse as main transcript	c.596A>G	p.Tyr199Cys	missense_variant	7/14	5		ENSP00000303500
PAH	ENST00000551988.5 linkuse as main transcript			downstream_gene_variant		3

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251352

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135832

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000163

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000157

AC:

AN:

1461790

Hom.:

Cov.:

AF XY:

0.0000165

AC XY:

AN XY:

727202

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000227

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000126

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152196

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74358

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.00000961

Hom.:

Bravo

AF:

0.0000340

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:9Other:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Phenylketonuria

Pathogenic:8

Pathogenic, no assertion criteria provided	literature only	OMIM	May 01, 1992	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 12, 2024	- -
Pathogenic, no assertion criteria provided	clinical testing	Counsyl	Oct 22, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Dec 13, 2018	Variant summary: PAH c.611A>G (p.Tyr204Cys) results in a non-conservative amino acid change located in the Aromatic amino acid hydroxylase, C-terminal domain of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. Several computational tools predict a significant impact on normal splicing: Four predict the variant creates a 5' donor site. One publication reports experimental evidence showing that this variant affects mRNA splicing resulting in a 32-amino acid deletion in the core region of the PAH enzyme (Ellingsen_1997). The variant allele was found at a frequency of 1.2e-05 in 246108 control chromosomes (gnomAD). The variant, c.611A>G, has been reported in the literature in multiple individuals affected with Phenylalanine Hydroxylase Deficiency (Phenylketonuria) (Tao_2015, Liang_2014, Song_2005, Ellingsen_1997). These data indicate that the variant is very likely to be associated with disease. A ClinVar submission from a clinical diagnostic laboratory (evaluation after 2014) cites the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 31, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 204 of the PAH protein (p.Tyr204Cys). RNA analysis indicates that this missense change induces altered splicing and likely results in the loss of 32 amino acid residue(s), but is expected to preserve the integrity of the reading-frame. This variant is present in population databases (rs62514927, gnomAD 0.02%). This missense change has been observed in individual(s) with phenylketonuria (PMID: 2589491, 15503242, 18985011). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 590). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt PAH protein function with a negative predictive value of 80%. Studies have shown that this missense change results in the activation of a cryptic splice site in exon 6 (PMID: 8990021). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -
Pathogenic, reviewed by expert panel	curation	ClinGen PAH Variant Curation Expert Panel	Mar 26, 2021	The c.611A>G (p.Tyr204Cys) variant in PAH has been reported in multiple individuals with Classic PKU and MHP (BH4 deficiency excluded). (PMID: 15503242). This variant has a MAF (0.00016) in gnomAD. This variant creates a fully active, novel 5 Ì donor splice site which results in an aberrantly spliced mRNA with a 96-nt deletion at the 3 Ì-end of exon 6 PMID: 8990021 (aka Ex6-96A>G). Multiple lines of computational evidence support a deleterious effect. This variant was detected in trans with multiple pathogenic variants including: p.R111* (2); c.442-1G>A; p.R158W; p.L255S; p.P281L; p.K363Nfs*37; p.V399V; p.R408W; p.R241C (2); p.R243Q; p.R261Q (2); p.S349A; p.R413P; p.A434D (2) (PMID: 26322415). In summary, this variant meets criteria to be classified as pathogenic for PAH. PAH-specific ACMG/AMP criteria applied: PM2, PP4_Moderate, PM3_very-strong, PP3. -

not provided

Pathogenic:1Other:1

not provided, no classification provided	literature only	DeBelle Laboratory for Biochemical Genetics, MUHC/MCH RESEARCH INSTITUTE	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Jul 20, 2017	The c.611 A>G variant in the PAH is a common pathogenic variant in Chinese patients with phenylketonuria (PKU) and is associated with a classic PKU phenotype (Lee et al., 2004; Yu et al., 2008; Chen et al., 2015). Functional analysis of c.611 A>G found that results in abnormal splicing and it is classified as a not responsive to tetrahydrobiopterin (BH4) therapy (Ellingsen et al., 1997; Sarkissian et al., 2012)) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.078

BayesDel_addAF

Pathogenic

0.24

BayesDel_noAF

Pathogenic

0.38

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.83

D;D

Eigen

Uncertain

0.33

Eigen_PC

Uncertain

0.35

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.94

D;D

M_CAP

Pathogenic

0.64

MetaRNN

Pathogenic

0.85

D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Benign

1.8

L;.

MutationTaster

Benign

1.0

A;A

PrimateAI

Benign

0.48

PROVEAN

Benign

-1.3

N;N

REVEL

Pathogenic

0.78

Sift

Uncertain

0.0050

D;D

Sift4G

Uncertain

0.0060

D;D

Polyphen

0.43

B;.

Vest4

0.66

MutPred

0.44

Gain of helix (P = 0.2059);.;

MVP

0.97

MPC

0.16

ClinPred

0.65

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.65

gMVP

0.86

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.67

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.67

Position offset: 1

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over