Genetic Variant HADHA:c.*464_*465delTG (chr2-26190784-GCA-G) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BS1_SupportingBS2

The NM_000182.5(HADHA):c.*464_*465delTG variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00318 in 252,156 control chromosomes in the GnomAD database, including 4 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0049 ( 3 hom., cov: 33)

Exomes 𝑓: 0.00062 ( 1 hom. )

Consequence

HADHA
NM_000182.5 3_prime_UTR

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, single submitter U:2

Conservation

PhyloP100: 0.159

Publications

0 publications found

Variant links:

Genes affected

HADHA (HGNC:4801): (hydroxyacyl-CoA dehydrogenase trifunctional multienzyme complex subunit alpha) This gene encodes the alpha subunit of the mitochondrial trifunctional protein, which catalyzes the last three steps of mitochondrial beta-oxidation of long chain fatty acids. The mitochondrial membrane-bound heterocomplex is composed of four alpha and four beta subunits, with the alpha subunit catalyzing the 3-hydroxyacyl-CoA dehydrogenase and enoyl-CoA hydratase activities. Mutations in this gene result in trifunctional protein deficiency or LCHAD deficiency. The genes of the alpha and beta subunits of the mitochondrial trifunctional protein are located adjacent to each other in the human genome in a head-to-head orientation. [provided by RefSeq, Jul 2008]

HADHA links:

GAREM2 (HGNC:27172): (GRB2 associated regulator of MAPK1 subtype 2)

GAREM2 links:

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ACMG classification

Classification was made for transcript

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

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00486 (740/152298) while in subpopulation AFR AF = 0.0173 (720/41542). AF 95% confidence interval is 0.0163. There are 3 homozygotes in GnomAd4. There are 373 alleles in the male GnomAd4 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

BS2

High Homozygotes in GnomAd4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HADHA	NM_000182.5 link	c.464_465delTG		3_prime_UTR_variant	Exon 20 of 20	ENST00000380649.8	NP_000173.2	P40939-1E9KL44
GAREM2	XM_011532567.4 link	c.1683+3476_1683+3477delCA		intron_variant	Intron 6 of 6		XP_011530869.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HADHA	ENST00000380649.8 link	c.464_465delTG		3_prime_UTR_variant	Exon 20 of 20	1	NM_000182.5	ENSP00000370023.3		P40939-1

Frequencies

GnomAD3 genomes

AF:

0.00486

AC:

740

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0174

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00105

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00143

GnomAD4 exome

AF:

0.000621

AC:

AN:

99858

Hom.:

AF XY:

0.000556

AC XY:

AN XY:

52178

show subpopulations

African (AFR)

AF:

0.0172

AC:

AN:

3144

American (AMR)

AF:

0.000674

AC:

AN:

4452

Ashkenazi Jewish (ASJ)

AF:

0.000834

AC:

AN:

2398

East Asian (EAS)

AF:

0.00

AC:

AN:

4750

South Asian (SAS)

AF:

0.00

AC:

AN:

14248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

4736

Middle Eastern (MID)

AF:

0.00

AC:

AN:

372

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

60560

Other (OTH)

AF:

0.000577

AC:

AN:

5198

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.494

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00486

AC:

740

AN:

152298

Hom.:

Cov.:

AF XY:

0.00501

AC XY:

373

AN XY:

74478

show subpopulations

African (AFR)

AF:

0.0173

AC:

720

AN:

41542

American (AMR)

AF:

0.00105

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68020

Other (OTH)

AF:

0.00142

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

130

162

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00559

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Long chain 3-hydroxyacyl-CoA dehydrogenase deficiency

Uncertain:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Mitochondrial trifunctional protein deficiency

Uncertain:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.16

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

Publications

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2-26190784-GCA-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over