12-102844371-C-G

Variant names:

• chr12-102844371-C-G
• rs62508679
• NM_000277.3:c.1030G>C

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP4 PP3 PM3_Supporting

This summary comes from the ClinGen Evidence Repository: The c.1030G>C (p.Gly344Arg) variant in PAH has been reported in 1 individual with with classic PKU, detected with pathogenic variant c.1315+1G>A (aka IVS12+1G>A, PMID:23430918). This variant is absent in population databases. Multiple lines of computational evidence support a deleterious effect. Other missense changes at the same amino acid residue have been seen before (p.Gly344Val, p.Gly344Asp and p.Gly344Ser are likely pathogenic by PAH VCEP). In summary, this variant meets criteria to be classified as uncertain significance for PAH. PAH-specific ACMG/AMP criteria applied: PP3, PP4, PM2, PM3_supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA229287/MONDO:0009861/006

• Frequency: Genomes: not found (cov: 32)
• Consequence: PAH NM_000277.3 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:1 O:1
• Conservation: PhyloP100: 7.91

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 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 rank	MANE	Protein	UniProt
PAH	NM_000277.3	c.1030G>C	p.Gly344Arg	missense_variant	Exon 10 of 13	ENST00000553106.6	NP_000268.1
PAH	NM_001354304.2	c.1030G>C	p.Gly344Arg	missense_variant	Exon 11 of 14		NP_001341233.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PAH	ENST00000553106.6	c.1030G>C	p.Gly344Arg	missense_variant	Exon 10 of 13	1	NM_000277.3	ENSP00000448059.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1 Other:1

Revision: reviewed by expert panel

Submissions by phenotype

Phenylketonuria Uncertain:1

Jun 11, 2021

ClinGen PAH Variant Curation Expert Panel

Significance: Uncertain significance

Review Status: reviewed by expert panel

Collection Method: curation

The c.1030G>C (p.Gly344Arg) variant in PAH has been reported in 1 individual with with classic PKU, detected with pathogenic variant c.1315+1G>A (aka IVS12+1G>A, PMID: 23430918). This variant is absent in population databases. Multiple lines of computational evidence support a deleterious effect. Other missense changes at the same amino acid residue have been seen before (p.Gly344Val, p.Gly344Asp and p.Gly344Ser are likely pathogenic by PAH VCEP). In summary, this variant meets criteria to be classified as uncertain significance for PAH. PAH-specific ACMG/AMP criteria applied: PP3, PP4, PM2, PM3_supporting. -

not provided Other:1

-

DeBelle Laboratory for Biochemical Genetics, MUHC/MCH RESEARCH INSTITUTE

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	31
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	1.0	D;D
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D
M_CAP	Pathogenic	0.76	D
MetaRNN	Pathogenic	1.0	D;D
MetaSVM	Pathogenic	0.96	D
MutationAssessor	Pathogenic	4.5	H;.
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-7.7	D;D
REVEL	Pathogenic	0.98
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.99
MutPred		0.99		Loss of ubiquitination at K341 (P = 0.054);.;
MVP		0.99
MPC		0.25
ClinPred		1.0	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.98
gMVP		1.0

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

Other links and lift over

dbSNP: rs62508679; hg19: chr12-103238149;