chr12-95002431-C-A

Variant names:

• chr12-95002431-C-A
• NM_018838.5:c.169+308G>T

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_018838.5(NDUFA12):​c.169+308G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.000025 (0 hom., cov: 0)
  • Failed GnomAD Quality Control
• Consequence: NDUFA12 NM_018838.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.280
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• mitochondrial complex I deficiency, nuclear type 23

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• Leigh syndrome with leukodystrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Leigh syndrome

  Inheritance: AR Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018838.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NDUFA12	NM_018838.5	MANE Select	c.169+308G>T		intron	N/A	NP_061326.1
	NDUFA12	NM_001258338.2		c.169+308G>T		intron	N/A	NP_001245267.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NDUFA12	ENST00000327772.7	TSL:1 MANE Select	c.169+308G>T		intron	N/A	ENSP00000330737.2
	NDUFA12	ENST00000684171.1		c.169+308G>T		intron	N/A	ENSP00000506808.1
	NDUFA12	ENST00000547986.5	TSL:2	c.169+308G>T		intron	N/A	ENSP00000450130.1

Frequencies

GnomAD3 genomes AF: 0.0000254 AC: 1 AN: 39366 Hom.: 0 Cov.: 0

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000420

Gnomad OTH AF: 0.00

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000254 AC: 1 AN: 39366 Hom.: 0 Cov.: 0 AF XY: 0.0000570 AC XY: 1 AN XY: 17548

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 8072

American (AMR) AF: 0.00 AC: 0 AN: 2268

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 1128

East Asian (EAS) AF: 0.00 AC: 0 AN: 1352

South Asian (SAS) AF: 0.00 AC: 0 AN: 792

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 1128

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 30

European-Non Finnish (NFE) AF: 0.0000420 AC: 1 AN: 23782

Other (OTH) AF: 0.00 AC: 0 AN: 480

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	2.2
DANN	Benign	0.23
PhyloP100		0.28

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

Other links and lift over

hg19: chr12-95396207;