5-119489219-A-T

Variant names:

• chr5-119489219-A-T
• rs387906825
• NM_000414.4:c.650A>T

Variant summary

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

The NM_000414.4(HSD17B4):​c.650A>T​(p.Tyr217Phe) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y217C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: HSD17B4 NM_000414.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.19
• Publications: 12 publications found

Genes affected

HSD17B4 (HGNC:5213): (hydroxysteroid 17-beta dehydrogenase 4) The protein encoded by this gene is a bifunctional enzyme that is involved in the peroxisomal beta-oxidation pathway for fatty acids. It also acts as a catalyst for the formation of 3-ketoacyl-CoA intermediates from both straight-chain and 2-methyl-branched-chain fatty acids. Defects in this gene that affect the peroxisomal fatty acid beta-oxidation activity are a cause of D-bifunctional protein deficiency (DBPD). An apparent pseudogene of this gene is present on chromosome 8. Multiple alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, May 2014]

HSD17B4 Gene-Disease associations (from GenCC):

• d-bifunctional protein deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Myriad Women’s Health, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, ClinGen
• Perrault syndrome

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Perrault syndrome 1

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

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

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 8 uncertain in NM_000414.4
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000414.4. 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
	HSD17B4	NM_000414.4	MANE Select	c.650A>T	p.Tyr217Phe	missense	Exon 9 of 24	NP_000405.1	A0A0S2Z4J1
	HSD17B4	NM_001199291.3		c.725A>T	p.Tyr242Phe	missense	Exon 10 of 25	NP_001186220.1	P51659-2
	HSD17B4	NM_001374497.1		c.641A>T	p.Tyr214Phe	missense	Exon 9 of 24	NP_001361426.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HSD17B4	ENST00000510025.7	TSL:2 MANE Select	c.650A>T	p.Tyr217Phe	missense	Exon 9 of 24	ENSP00000424940.3	P51659-1
	HSD17B4	ENST00000509514.6	TSL:1	c.650A>T	p.Tyr217Phe	missense	Exon 9 of 24	ENSP00000426272.2	E7EPL9
	HSD17B4	ENST00000414835.7	TSL:2	c.725A>T	p.Tyr242Phe	missense	Exon 10 of 25	ENSP00000411960.3	P51659-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
PhyloP100		7.2
Varity_R		0.48
gMVP		0.78
Mutation Taster		=33/67	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: rs387906825; hg19: chr5-118824914;