FAH p.Asp399Tyr

Variant names:

• chr15-80186144-G-T
• rs1449927772
• NM_000137.4:c.1195G>T
• FAH p.Asp399Tyr

Your query was ambiguous. Multiple possible variants found:

• chr15-80186144-G-T
• chr15-80186144-GAT-TAC

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM1 PM2

The NM_000137.4(FAH):​c.1195G>T​(p.Asp399Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,810 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. D399V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: FAH NM_000137.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.737
• Publications: 0 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: G2P, Myriad Women's Health, ClinGen, Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics, Laboratory for Molecular Medicine

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 7 uncertain in NM_000137.4
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000137.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FAH	NM_000137.4	MANE Select	c.1195G>T	p.Asp399Tyr	missense	Exon 14 of 14	NP_000128.1	A0A384P5L6
	FAH	NM_001374377.1		c.1195G>T	p.Asp399Tyr	missense	Exon 15 of 15	NP_001361306.1	A0A384P5L6
	FAH	NM_001374380.1		c.1195G>T	p.Asp399Tyr	missense	Exon 15 of 15	NP_001361309.1	A0A384P5L6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FAH	ENST00000561421.6	TSL:1 MANE Select	c.1195G>T	p.Asp399Tyr	missense	Exon 14 of 14	ENSP00000453347.2	P16930-1
	FAH	ENST00000539156.5	TSL:1	n.3223G>T		non_coding_transcript_exon	Exon 13 of 13
	FAH	ENST00000874657.1		c.1297G>T	p.Asp433Tyr	missense	Exon 16 of 16	ENSP00000544716.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461810 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727218

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111934

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.21
CADD	Benign	18
DANN	Benign	0.96
DEOGEN2	Pathogenic	0.94	D
Eigen	Benign	0.0013
Eigen_PC	Benign	-0.17
FATHMM_MKL	Benign	0.26	N
LIST_S2	Pathogenic	0.98	D
M_CAP	Pathogenic	0.57	D
MetaRNN	Uncertain	0.64	D
MetaSVM	Pathogenic	0.88	D
MutationAssessor	Pathogenic	3.6	H
PhyloP100		0.74
PrimateAI	Benign	0.38	T
PROVEAN	Pathogenic	-5.3	D
REVEL	Uncertain	0.63
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.77
gMVP		0.74
Mutation Taster		=26/74	disease causing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs1449927772; hg19: chr15-80478486;