chr5-119452501-C-A

Variant names:

• chr5-119452501-C-A
• rs26180
• NM_000414.4:c.-75C>A

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_Strong BS1_Supporting

The NM_000414.4(HSD17B4):​c.-75C>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000559 in 1,610,958 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00028 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00059 (0 hom.)
• Consequence: HSD17B4 NM_000414.4 5_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 0.0680
• Publications: 10 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: ClinGen, Myriad Women’s Health, Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• Perrault syndrome

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

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

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.73).
• BS1: Variant frequency is greater than expected in population nfe. GnomAdExome4 allele frequency = 0.000589 (859/1458816) while in subpopulation NFE AF = 0.000732 (813/1110840). AF 95% confidence interval is 0.00069. There are 0 homozygotes in GnomAdExome4. There are 413 alleles in the male GnomAdExome4 subpopulation. Median coverage is 33. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HSD17B4	NM_000414.4	c.-75C>A		5_prime_UTR_variant	Exon 1 of 24	ENST00000510025.7	NP_000405.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HSD17B4	ENST00000510025.7	c.-75C>A		5_prime_UTR_variant	Exon 1 of 24	2	NM_000414.4	ENSP00000424940.3

Frequencies

GnomAD3 genomes AF: 0.000276 AC: 42 AN: 152024 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.000145

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000194

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000485

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.000589 AC: 859 AN: 1458816 Hom.: 0 Cov.: 33 AF XY: 0.000569 AC XY: 413 AN XY: 725834

African (AFR) AF: 0.000239 AC: 8 AN: 33422

American (AMR) AF: 0.000314 AC: 14 AN: 44602

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26106

East Asian (EAS) AF: 0.000101 AC: 4 AN: 39676

South Asian (SAS) AF: 0.00 AC: 0 AN: 86142

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53176

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4650

European-Non Finnish (NFE) AF: 0.000732 AC: 813 AN: 1110840

Other (OTH) AF: 0.000332 AC: 20 AN: 60202

GnomAD4 genome AF: 0.000276 AC: 42 AN: 152142 Hom.: 0 Cov.: 33 AF XY: 0.000296 AC XY: 22 AN XY: 74374

African (AFR) AF: 0.000145 AC: 6 AN: 41522

American (AMR) AF: 0.000131 AC: 2 AN: 15288

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.000195 AC: 1 AN: 5138

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10580

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 292

European-Non Finnish (NFE) AF: 0.000485 AC: 33 AN: 67996

Other (OTH) AF: 0.00 AC: 0 AN: 2116

Alfa AF: 0.00 Hom.: 924

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Bifunctional peroxisomal enzyme deficiency Uncertain:1

Apr 28, 2017

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Perrault syndrome 1 Uncertain:1

Apr 28, 2017

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.73
CADD	Benign	7.1
DANN	Benign	0.62
PhyloP100		0.068
PromoterAI		-0.14	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.0

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs26180; hg19: chr5-118788196;