chr2-26232151-T-TA

Position:

• chr2-26232151-T-TA

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP6_Very_Strong BS1 BS2

The NM_000182.5(HADHA):​c.573+8dupT variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00141 in 1,606,826 control chromosomes in the GnomAD database, including 18 homozygotes. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0056 (7 hom., cov: 32)
  • Exomes 𝑓: 0.00097 (11 hom.)
• Consequence: HADHA NM_000182.5 splice_region, intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: 0.557

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 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -16 ACMG points.

• BP6: Variant 2-26232151-T-TA is Benign according to our data. Variant chr2-26232151-T-TA is described in ClinVar as [Benign]. Clinvar id is 203737.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00557 (848/152272) while in subpopulation AFR AF= 0.0191 (793/41548). AF 95% confidence interval is 0.018. There are 7 homozygotes in gnomad4. There are 392 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 7 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HADHA	NM_000182.5	c.573+8dupT		splice_region_variant, intron_variant		ENST00000380649.8	NP_000173.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HADHA	ENST00000380649.8	c.573+8dupT		splice_region_variant, intron_variant		1	NM_000182.5	ENSP00000370023.3

Frequencies

GnomAD3 genomes AF: 0.00555 AC: 845 AN: 152154 Hom.: 7 Cov.: 32

Gnomad AFR AF: 0.0190

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00111

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00600

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00430

GnomAD3 exomes AF: 0.00229 AC: 575 AN: 251216 Hom.: 5 AF XY: 0.00221 AC XY: 300 AN XY: 135770

Gnomad AFR exome AF: 0.0194

Gnomad AMR exome AF: 0.000896

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00725

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000881

Gnomad OTH exome AF: 0.000815

GnomAD4 exome AF: 0.000973 AC: 1415 AN: 1454554 Hom.: 11 Cov.: 29 AF XY: 0.00110 AC XY: 795 AN XY: 724208

Gnomad4 AFR exome AF: 0.0188

Gnomad4 AMR exome AF: 0.000850

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00699

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000814

Gnomad4 OTH exome AF: 0.00221

GnomAD4 genome AF: 0.00557 AC: 848 AN: 152272 Hom.: 7 Cov.: 32 AF XY: 0.00527 AC XY: 392 AN XY: 74450

Gnomad4 AFR AF: 0.0191

Gnomad4 AMR AF: 0.00111

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00580

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00426

Alfa AF: 0.00228 Hom.: 1

Bravo AF: 0.00622

Asia WGS AF: 0.00751 AC: 29 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 08, 2014	The variant is found in FAO-MET,UCD-MET panel(s). -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jul 12, 2018	Variant summary: HADHA c.573+8dupT alters a nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 5/5 computational tools predict no significant changes to splicing, however, these predictions have not been assessed by functional studies. The variant allele was found at a frequency of 0.0026 in 276958 control chromosomes in the gnomAD database, including 8 homozygotes. The observed variant frequency is approximately 1.36 fold above the estimated maximal expected allele frequency for a pathogenic variant in HADHA causing Long Chain 3-Hydroxyacyl-CoA Dehydrogenase Deficiency phenotype (0.0019), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.573+8dupT in individuals affected with Long Chain 3-Hydroxyacyl-CoA Dehydrogenase Deficiency and no experimental evidence demonstrating its impact on protein function have been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as benign. -

Long chain 3-hydroxyacyl-CoA dehydrogenase deficiency Benign:1

Benign, no assertion criteria provided

clinical testing

Natera, Inc.

Sep 16, 2020

- -

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Nov 22, 2023

- -

Mitochondrial trifunctional protein deficiency;C3711645:Long chain 3-hydroxyacyl-CoA dehydrogenase deficiency Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

Computational scores

Source: dbNSFP v4.3

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

LitVar

Other links and lift over

dbSNP: rs112196218; hg19: chr2-26455019;