15-80173143-A-T

Variant names:

• chr15-80173143-A-T
• rs121965078
• NM_000137.4:c.836A>T

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PM5 PP3_Moderate

The NM_000137.4(FAH):​c.836A>T​(p.Gln279Leu) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q279R) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: FAH NM_000137.4 missense, splice_region
• Scores: Splicing: ADA: 0.9848
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 8.52
• Publications: 13 publications found

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]

FAH Gene-Disease associations (from GenCC):

• tyrosinemia type I

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Myriad Women’s Health, Laboratory for Molecular Medicine, G2P, Orphanet, Ambry Genetics, ClinGen

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr15-80173143-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 11875.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.906

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAH	NM_000137.4	c.836A>T	p.Gln279Leu	missense_variant, splice_region_variant	Exon 9 of 14	ENST00000561421.6	NP_000128.1
FAH	NM_001374377.1	c.836A>T	p.Gln279Leu	missense_variant, splice_region_variant	Exon 10 of 15		NP_001361306.1
FAH	NM_001374380.1	c.836A>T	p.Gln279Leu	missense_variant, splice_region_variant	Exon 10 of 15		NP_001361309.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FAH	ENST00000561421.6	c.836A>T	p.Gln279Leu	missense_variant, splice_region_variant	Exon 9 of 14	1	NM_000137.4	ENSP00000453347.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.53
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.30
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.92	D;D;D
Eigen	Uncertain	0.59
Eigen_PC	Uncertain	0.49
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Pathogenic	0.97	.;.;D
M_CAP	Pathogenic	0.72	D
MetaRNN	Pathogenic	0.91	D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.0	H;H;H
PhyloP100		8.5
PrimateAI	Benign	0.45	T
PROVEAN	Pathogenic	-6.8	D;D;D
REVEL	Pathogenic	0.81
Sift	Uncertain	0.0020	D;D;D
Sift4G	Uncertain	0.0090	D;D;D
Polyphen		1.0	D;D;D
Vest4		0.77
MutPred		0.47		Loss of disorder (P = 0.0618);Loss of disorder (P = 0.0618);Loss of disorder (P = 0.0618);
MVP		0.87
MPC		0.68
ClinPred		1.0	D
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7
Varity_R		0.91
gMVP		0.84

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.98
dbscSNV1_RF	Benign	0.59
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

Other links and lift over

dbSNP: rs121965078; hg19: chr15-80465485;