rs199475673

Positions:

• chr12-102855153-A-C
• chr12-102855153-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PP3 PM2

This summary comes from the ClinGen Evidence Repository: The c.689T>G (p.Val230Gly) variant in PAH was reported to the McGill PAHdb by Carducci in 1999, but has not been found in the literature. This variant is absent in population databases. Multiple lines of computational evidence support a deleterious effect. In summary, this variant meets criteria to be classified as uncertain significance for PAH. PAH-specific ACMG/AMP criteria applied: PM2, PP3. LINK:https://erepo.genome.network/evrepo/ui/classification/CA229692/MONDO:0009861/006

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: PAH NM_000277.3 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:1 O:1
• Conservation: PhyloP100: 9.32

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 3 ACMG points.

• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PP3: For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PAH	NM_000277.3	c.689T>G	p.Val230Gly	missense_variant	6/13	ENST00000553106.6	NP_000268.1
PAH	NM_001354304.2	c.689T>G	p.Val230Gly	missense_variant	7/14		NP_001341233.1
PAH	XM_017019370.2	c.689T>G	p.Val230Gly	missense_variant	6/7		XP_016874859.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PAH	ENST00000553106.6	c.689T>G	p.Val230Gly	missense_variant	6/13	1	NM_000277.3	ENSP00000448059	P1
PAH	ENST00000549111.5	n.785T>G		non_coding_transcript_exon_variant	6/6	1
PAH	ENST00000307000.7	c.674T>G	p.Val225Gly	missense_variant	7/14	5		ENSP00000303500

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461754 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 727208

Gnomad4 AFR exome AF: 0.0000299

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: 0.00

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

Aug 20, 2020

The c.689T>G (p.Val230Gly) variant in PAH was reported to the McGill PAHdb by Carducci in 1999, but has not been found in the literature. This variant is absent in population databases. Multiple lines of computational evidence support a deleterious effect. In summary, this variant meets criteria to be classified as uncertain significance for PAH. PAH-specific ACMG/AMP criteria applied: 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	0.83
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	1.0	D;D
Eigen	Pathogenic	0.93
Eigen_PC	Pathogenic	0.82
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Pathogenic	0.90	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Pathogenic	0.96	D
MutationAssessor	Pathogenic	4.1	H;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.60	T
PROVEAN	Pathogenic	-6.7	D;D
REVEL	Pathogenic	0.97
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.86
MutPred		0.97		Loss of stability (P = 0.0132);.;
MVP		0.99
MPC		0.26
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.99
gMVP		0.98

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: rs199475673; hg19: chr12-103248931;