chr12-94971477-ATCT-A

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PM4_SupportingBS1_SupportingBS2

The NM_018838.5(NDUFA12):c.398_400delAGA(p.Lys133del) variant causes a disruptive inframe deletion change. The variant allele was found at a frequency of 0.00146 in 1,614,170 control chromosomes in the GnomAD database, including 4 homozygotes. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0010 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0015 ( 4 hom. )

Consequence

NDUFA12
NM_018838.5 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:1

Conservation

PhyloP100: 7.07

Variant links:

Genes affected

NDUFA12 (HGNC:23987): (NADH:ubiquinone oxidoreductase subunit A12) This gene encodes a protein which is part of mitochondrial complex 1, part of the oxidative phosphorylation system in mitochondria. Complex 1 transfers electrons to ubiquinone from NADH which establishes a proton gradient for the generation of ATP. Mutations in this gene are associated with Leigh syndrome due to mitochondrial complex 1 deficiency. Pseudogenes of this gene are located on chromosomes 5 and 13. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2012]

NDUFA12 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PM4

Nonframeshift variant in NON repetitive region in NM_018838.5. Strenght limited to Supporting due to length of the change: 1aa.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.001 (153/152304) while in subpopulation NFE AF= 0.00196 (133/68024). AF 95% confidence interval is 0.00168. There are 0 homozygotes in gnomad4. There are 58 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Homozygotes in GnomAdExome4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NDUFA12	NM_018838.5 link	c.398_400delAGA	p.Lys133del	disruptive_inframe_deletion	Exon 4 of 4	ENST00000327772.7	NP_061326.1	Q9UI09-1
NDUFA12	NM_001258338.2 link	c.118_120delAGA		3_prime_UTR_variant	Exon 3 of 3		NP_001245267.1	Q9UI09-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NDUFA12	ENST00000327772.7 link	c.398_400delAGA	p.Lys133del	disruptive_inframe_deletion	Exon 4 of 4	1	NM_018838.5	ENSP00000330737.2		Q9UI09-1

Frequencies

GnomAD3 genomes

AF:

0.00101

AC:

153

AN:

152186

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000217

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00195

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000808

AC:

203

AN:

251354

Hom.:

AF XY:

0.000861

AC XY:

117

AN XY:

135846

show subpopulations

Gnomad AFR exome

AF:

0.000369

Gnomad AMR exome

AF:

0.000318

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000588

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.00143

Gnomad OTH exome

AF:

0.000652

GnomAD4 exome

AF:

0.00150

AC:

2200

AN:

1461866

Hom.:

AF XY:

0.00148

AC XY:

1075

AN XY:

727238

show subpopulations

Gnomad4 AFR exome

AF:

0.000329

Gnomad4 AMR exome

AF:

0.000246

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000603

Gnomad4 FIN exome

AF:

0.000131

Gnomad4 NFE exome

AF:

0.00185

Gnomad4 OTH exome

AF:

0.000960

GnomAD4 genome

AF:

0.00100

AC:

153

AN:

152304

Hom.:

Cov.:

AF XY:

0.000779

AC XY:

AN XY:

74480

show subpopulations

Gnomad4 AFR

AF:

0.000217

Gnomad4 AMR

AF:

0.000588

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00196

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000387

Hom.:

Bravo

AF:

0.000873

EpiCase

AF:

0.000981

EpiControl

AF:

0.00142

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Oct 29, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant, c.398_400del, results in the deletion of 1 amino acid(s) of the NDUFA12 protein (p.Lys133del), but otherwise preserves the integrity of the reading frame. This variant is present in population databases (rs561604238, gnomAD 0.2%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with NDUFA12-related conditions. ClinVar contains an entry for this variant (Variation ID: 806925). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Jun 01, 2016

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 05, 2025

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In-frame deletion of 1 amino acid in a non-repeat region; In silico analysis supports a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Inborn genetic diseases

Benign:1

Nov 08, 2021

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over