rs80338899

Positions:

• chr15-80173093-G-A

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The ENST00000561421.6(FAH):​c.786G>A​(p.Trp262Ter) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000607 in 1,614,098 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: 𝑓 0.000085 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000058 (0 hom.)
• Consequence: FAH ENST00000561421.6 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:5 O:1
• Conservation: PhyloP100: 9.14

Genes affected

FAH (HGNC:3579): (fumarylacetoacetate hydrolase) Predicted to enable fumarylacetoacetase activity. Predicted to be involved in L-phenylalanine catabolic process; homogentisate catabolic process; and tyrosine catabolic process. Predicted to act upstream of or within arginine catabolic process. Located in extracellular exosome. Implicated in tyrosinemia type I. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 15-80173093-G-A is Pathogenic according to our data. Variant chr15-80173093-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 11873.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FAH	NM_000137.4	c.786G>A	p.Trp262Ter	stop_gained	9/14	ENST00000561421.6	NP_000128.1
FAH	NM_001374377.1	c.786G>A	p.Trp262Ter	stop_gained	10/15		NP_001361306.1
FAH	NM_001374380.1	c.786G>A	p.Trp262Ter	stop_gained	10/15		NP_001361309.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FAH	ENST00000561421.6	c.786G>A	p.Trp262Ter	stop_gained	9/14	1	NM_000137.4	ENSP00000453347	P1

Frequencies

GnomAD3 genomes AF: 0.0000854 AC: 13 AN: 152210 Hom.: 0 Cov.: 33

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: 0.00113

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000795 AC: 20 AN: 251482 Hom.: 0 AF XY: 0.0000662 AC XY: 9 AN XY: 135914

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.000647

Gnomad NFE exome AF: 0.0000440

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000581 AC: 85 AN: 1461888 Hom.: 0 Cov.: 32 AF XY: 0.0000578 AC XY: 42 AN XY: 727244

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: 0.00144

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.0000993

GnomAD4 genome AF: 0.0000854 AC: 13 AN: 152210 Hom.: 0 Cov.: 33 AF XY: 0.000134 AC XY: 10 AN XY: 74362

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: 0.00113

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000217 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.0000988 AC: 12

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:5 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Tyrosinemia type I Pathogenic:5 Other:1

Pathogenic, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Nov 12, 2019	NM_000137.2(FAH):c.786G>A(W262*) is classified as pathogenic in the context of type I tyrosinemia. Sources cited for classification include the following: PMID 8723698, 8162054, 15465000, 7942842, 15638932 and 8829657. Classification of NM_000137.2(FAH):c.786G>A(W262*) is based on the following criteria: The variant causes a premature termination codon that is expected to be targeted by nonsense-mediated mRNA decay and is reported in individuals with the relevant phenotype. Please note: this variant was assessed in the context of healthy population screening. -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 01, 2020	- -
not provided, no classification provided	literature only	GeneReviews	-	Finnish-specific pathogenic variant resulting from founder effect or genetic drift [Angileri et al 2015]. -
Pathogenic, no assertion criteria provided	literature only	OMIM	Jan 01, 1996	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Sep 29, 2022	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 27, 2023	This sequence change creates a premature translational stop signal (p.Trp262*) in the FAH gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in FAH are known to be pathogenic (PMID: 9101289, 9633815). This variant is present in population databases (rs80338899, gnomAD 0.07%). This premature translational stop signal has been observed in individuals with tyrosinemia type I in Scandinavia (PMID: 7942842, 8162054, 8829657). ClinVar contains an entry for this variant (Variation ID: 11873). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.54
CADD	Pathogenic	43
DANN	Uncertain	1.0
Eigen	Pathogenic	0.86
Eigen_PC	Pathogenic	0.70
FATHMM_MKL	Uncertain	0.94	D
MutationTaster	Benign	1.0	A;A;A;A
Vest4		0.96
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs80338899; hg19: chr15-80465435;