16-69710977-C-G

Variant names:

• chr16-69710977-C-G
• NM_000903.3:c.824G>C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PM4

The NM_000903.3(NQO1):​c.824G>C​(p.Ter275Serext*?) variant causes a stop lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000756 in 1,455,750 control chromosomes in the GnomAD database, with no homozygous occurrence. 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: not found (cov: 32)
  • Exomes 𝑓: 0.0000076 (0 hom.)
• Consequence: NQO1 NM_000903.3 stop_lost
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.692

Genes affected

NQO1 (HGNC:2874): (NAD(P)H quinone dehydrogenase 1) This gene is a member of the NAD(P)H dehydrogenase (quinone) family and encodes a cytoplasmic 2-electron reductase. This FAD-binding protein forms homodimers and reduces quinones to hydroquinones. This protein's enzymatic activity prevents the one electron reduction of quinones that results in the production of radical species. Mutations in this gene have been associated with tardive dyskinesia (TD), an increased risk of hematotoxicity after exposure to benzene, and susceptibility to various forms of cancer. Altered expression of this protein has been seen in many tumors and is also associated with Alzheimer's disease (AD). Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Stoplost variant in NM_000903.3 Downstream stopcodon found after 98 codons.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NQO1	NM_000903.3	c.824G>C	p.Ter275Serext*?	stop_lost	Exon 6 of 6	ENST00000320623.10	NP_000894.1
NQO1	NM_001025433.2	c.722G>C	p.Ter241Serext*?	stop_lost	Exon 5 of 5		NP_001020604.1
NQO1	NM_001025434.2	c.710G>C	p.Ter237Serext*?	stop_lost	Exon 5 of 5		NP_001020605.1
NQO1	NM_001286137.2	c.608G>C	p.Ter203Serext*?	stop_lost	Exon 4 of 4		NP_001273066.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NQO1	ENST00000320623.10	c.824G>C	p.Ter275Serext*?	stop_lost	Exon 6 of 6	1	NM_000903.3	ENSP00000319788.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000756 AC: 11 AN: 1455750 Hom.: 0 Cov.: 31 AF XY: 0.00000829 AC XY: 6 AN XY: 723508

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000992

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.45	T
BayesDel_noAF	Benign	-0.89
CADD	Benign	5.5
DANN	Benign	0.58
Eigen	Benign	0.13
Eigen_PC	Benign	-0.15
FATHMM_MKL	Benign	0.38	N
Vest4		0.30
GERP RS		0.71
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-69744880;