12-102894897-G-T

Position:

• chr12-102894897-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PP4_Moderate PM2 PP3

This summary comes from the ClinGen Evidence Repository: The c.190C>A (p.His64Asn) variant in PAH has been reported in a Danish mild PKU patient. Serum Phe levels exceeded 600 umol/L and other causes of hyperphenylalaninemia had been ruled out. It was In cis with p.T63P. PMID:8406445. The c.190C>A variant is absent from ExAC, gnomAD, 1000G, and ESP. A deleterious effect is predicted in SIFT, Polyphen-2, and MutationTaster. In summary, this variant meets criteria to be classified as uncertain significance for PAH. PAH-specific ACMG/AMP criteria applied: PP4_Moderate, PM2, PP3. LINK:https://erepo.genome.network/evrepo/ui/classification/CA229475/MONDO:0009861/006

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PAH NM_000277.3 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:1 O:1
• Conservation: PhyloP100: 7.06

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]

LOC124902999 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PAH	NM_000277.3	c.190C>A	p.His64Asn	missense_variant	3/13	ENST00000553106.6
LOC124902999	XR_007063428.1	n.863-9801G>T		intron_variant, non_coding_transcript_variant
PAH	NM_001354304.2	c.190C>A	p.His64Asn	missense_variant	4/14
PAH	XM_017019370.2	c.190C>A	p.His64Asn	missense_variant	3/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PAH	ENST00000553106.6	c.190C>A	p.His64Asn	missense_variant	3/13	1	NM_000277.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461376 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727038

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.00

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

Uncertain significance, reviewed by expert panel

curation

ClinGen PAH Variant Curation Expert Panel

Dec 10, 2018

The c.190C>A (p.His64Asn) variant in PAH has been reported in a Danish mild PKU patient. Serum Phe levels exceeded 600 umol/L and other causes of hyperphenylalaninemia had been ruled out. It was In cis with p.T63P. PMID: 8406445. The c.190C>A variant is absent from ExAC, gnomAD, 1000G, and ESP. A deleterious effect is predicted in SIFT, Polyphen-2, and MutationTaster. In summary, this variant meets criteria to be classified as uncertain significance for PAH. PAH-specific ACMG/AMP criteria applied: PP4_Moderate, PM2, PP3. -

not provided Other:1

not provided, no classification provided

literature only

DeBelle Laboratory for Biochemical Genetics, MUHC/MCH RESEARCH INSTITUTE

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.71
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
CADD	Pathogenic	28
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.98	D;D;D;D
Eigen	Pathogenic	0.88
Eigen_PC	Pathogenic	0.88
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D;D;D
M_CAP	Pathogenic	0.84	D
MetaRNN	Pathogenic	0.94	D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.3	M;.;.;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.76	T
PROVEAN	Pathogenic	-5.7	D;D;D;D
REVEL	Pathogenic	0.66
Sift	Uncertain	0.0010	D;D;D;D
Sift4G	Uncertain	0.023	D;D;D;.
Polyphen		0.99	D;.;.;.
Vest4		0.90
MutPred		0.69		Loss of catalytic residue at E66 (P = 0.0639);.;Loss of catalytic residue at E66 (P = 0.0639);Loss of catalytic residue at E66 (P = 0.0639);
MVP		0.99
MPC		0.25
ClinPred		1.0	D
GERP RS		6.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.97
gMVP		0.83

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: rs199475569; hg19: chr12-103288675;