16-78099787-G-T

Variant names:

• chr16-78099787-G-T
• rs778036247
• NM_016373.4:c.9G>T

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_016373.4(WWOX):​c.9G>T​(p.Ala3Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000712 in 1,404,494 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. Synonymous variant affecting the same amino acid position (i.e. A3A) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: WWOX NM_016373.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.229
• Publications: 0 publications found

Genes affected

WWOX (HGNC:12799): (WW domain containing oxidoreductase) This gene encodes a member of the short-chain dehydrogenases/reductases (SDR) protein family. This gene spans the FRA16D common chromosomal fragile site and appears to function as a tumor suppressor gene. Expression of the encoded protein is able to induce apoptosis, while defects in this gene are associated with multiple types of cancer. Disruption of this gene is also associated with autosomal recessive spinocerebellar ataxia 12. Disruption of a similar gene in mouse results in impaired steroidogenesis, additionally suggesting a metabolic function for the protein. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2014]

WWOX Gene-Disease associations (from GenCC):

• genetic developmental and epileptic encephalopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• autosomal recessive spinocerebellar ataxia 12

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics
• developmental and epileptic encephalopathy, 28

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• 46,XY partial gonadal dysgenesis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• undetermined early-onset epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.3).
• BP7: Synonymous conserved (PhyloP=-0.229 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
WWOX	NM_016373.4	c.9G>T	p.Ala3Ala	synonymous_variant	Exon 1 of 9	ENST00000566780.6	NP_057457.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
WWOX	ENST00000566780.6	c.9G>T	p.Ala3Ala	synonymous_variant	Exon 1 of 9	1	NM_016373.4	ENSP00000457230.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.12e-7 AC: 1 AN: 1404494 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 694292

African (AFR) AF: 0.00 AC: 0 AN: 31400

American (AMR) AF: 0.00 AC: 0 AN: 35374

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24856

East Asian (EAS) AF: 0.00 AC: 0 AN: 36048

South Asian (SAS) AF: 0.00 AC: 0 AN: 78894

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49710

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5214

European-Non Finnish (NFE) AF: 9.22e-7 AC: 1 AN: 1084856

Other (OTH) AF: 0.00 AC: 0 AN: 58142

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.30
CADD	Benign	4.8
DANN	Benign	0.89
PhyloP100		-0.23
PromoterAI		-0.011	Neutral
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

Other links and lift over

dbSNP: rs778036247; hg19: chr16-78133684;