Genetic Variant NDUFA2:p.Arg56Arg (chr5-140647296-G-A) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_ModerateBP6_ModerateBP7

The NM_002488.5(NDUFA2):c.168C>T(p.Arg56Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000703 in 1,423,304 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 Likely benign (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 7.0e-7 ( 0 hom. )

Consequence

NDUFA2
NM_002488.5 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.0790

Publications

0 publications found

Variant links:

Genes affected

NDUFA2 (HGNC:7685): (NADH:ubiquinone oxidoreductase subunit A2) The encoded protein is a subunit of the hydrophobic protein fraction of the NADH:ubiquinone oxidoreductase (complex 1), the first enzyme complex in the electron transport chain located in the inner mitochondrial membrane, and may be involved in regulating complex I activity or its assembly via assistance in redox processes. Mutations in this gene are associated with Leigh syndrome, an early-onset progressive neurodegenerative disorder. Alternative splicing results in multiple transcript variants.[provided by RefSeq, May 2010]

NDUFA2 links:

IK (HGNC:5958): (IK cytokine) The protein encoded by this gene was identified by its RED repeat, a stretch of repeated arginine, glutamic acid and aspartic acid residues. The protein localizes to discrete dots within the nucleus, excluding the nucleolus. Its function is unknown. This gene maps to chromosome 5; however, a pseudogene may exist on chromosome 2. [provided by RefSeq, Jul 2008]

IK links:

TMCO6 (HGNC:28814): (transmembrane and coiled-coil domains 6) Predicted to enable nuclear import signal receptor activity. Predicted to be involved in protein import into nucleus. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

TMCO6 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.41).

BP6

Variant 5-140647296-G-A is Benign according to our data. Variant chr5-140647296-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 718911.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=0.079 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NDUFA2	NM_002488.5 link	c.168C>T	p.Arg56Arg	synonymous_variant	Exon 2 of 3	ENST00000252102.9	NP_002479.1	O43678-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NDUFA2	ENST00000252102.9 link	c.168C>T	p.Arg56Arg	synonymous_variant	Exon 2 of 3	1	NM_002488.5	ENSP00000252102.5		O43678-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.03e-7

AC:

AN:

1423304

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

703012

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32556

American (AMR)

AF:

0.0000242

AC:

AN:

41382

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23474

East Asian (EAS)

AF:

0.00

AC:

AN:

39290

South Asian (SAS)

AF:

0.00

AC:

AN:

80478

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51748

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5576

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1090206

Other (OTH)

AF:

0.00

AC:

AN:

58594

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Aug 31, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.41

CADD

Benign

(source)

DANN

Benign

0.94

PhyloP100

0.079

PromoterAI

-0.0054

Neutral

(source)

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.7

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over