2-26201139-C-T

Position:

• chr2-26201139-C-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_000182.5(HADHA):​c.1392+10G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0041 in 1,603,088 control chromosomes in the GnomAD database, including 220 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.021 (119 hom., cov: 32)
  • Exomes 𝑓: 0.0023 (101 hom.)
• Consequence: HADHA NM_000182.5 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:8
• Conservation: PhyloP100: 0.699

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]

GAREM2 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.77).
• BP6: Variant 2-26201139-C-T is Benign according to our data. Variant chr2-26201139-C-T is described in ClinVar as [Benign]. Clinvar id is 203738.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0701 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HADHA	NM_000182.5	c.1392+10G>A		intron_variant		ENST00000380649.8
GAREM2	XM_011532567.4	c.1684-1094C>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HADHA	ENST00000380649.8	c.1392+10G>A		intron_variant		1	NM_000182.5	P1

Frequencies

GnomAD3 genomes AF: 0.0209 AC: 3173 AN: 152168 Hom.: 119 Cov.: 32

Gnomad AFR AF: 0.0723

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00759

Gnomad ASJ AF: 0.00374

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000294

Gnomad OTH AF: 0.0134

GnomAD3 exomes AF: 0.00592 AC: 1488 AN: 251230 Hom.: 46 AF XY: 0.00437 AC XY: 593 AN XY: 135814

Gnomad AFR exome AF: 0.0770

Gnomad AMR exome AF: 0.00339

Gnomad ASJ exome AF: 0.00615

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000196

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000291

Gnomad OTH exome AF: 0.00326

GnomAD4 exome AF: 0.00233 AC: 3383 AN: 1450802 Hom.: 101 Cov.: 29 AF XY: 0.00196 AC XY: 1414 AN XY: 722430

Gnomad4 AFR exome AF: 0.0779

Gnomad4 AMR exome AF: 0.00374

Gnomad4 ASJ exome AF: 0.00545

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000244

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000127

Gnomad4 OTH exome AF: 0.00513

GnomAD4 genome AF: 0.0209 AC: 3182 AN: 152286 Hom.: 119 Cov.: 32 AF XY: 0.0198 AC XY: 1471 AN XY: 74458

Gnomad4 AFR AF: 0.0723

Gnomad4 AMR AF: 0.00758

Gnomad4 ASJ AF: 0.00374

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000294

Gnomad4 OTH AF: 0.0132

Alfa AF: 0.0165 Hom.: 29

Bravo AF: 0.0240

Asia WGS AF: 0.00231 AC: 8 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 06, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Mar 23, 2020	Variant summary: HADHA c.1392+10G>A alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.0059 in 251230 control chromosomes, predominantly at a frequency of 0.077 within the African or African-American subpopulation in the gnomAD database, including 45 homozygotes. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 40 fold of 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 a benign polymorphism found primarily in populations of African or African-American origin. To our knowledge, no occurrence of c.1392+10G>A in individuals affected with Long Chain 3-Hydroxyacyl-CoA Dehydrogenase Deficiency and no experimental evidence demonstrating its impact on protein function have been reported. Two ClinVar submitters (evaluation after 2014) cite the variant as benign and likely benign. Based on the evidence outlined above, the variant was classified as benign. -

Long chain 3-hydroxyacyl-CoA dehydrogenase deficiency Benign:2

Benign, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Sep 21, 2023	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Mitochondrial trifunctional protein deficiency Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

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

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.77
CADD	Benign	13
DANN	Benign	0.56

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: rs60085478; hg19: chr2-26424008;