2-26537774-C-T

Position:

chr2-26537774-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_194248.3(OTOF):c.80G>A(p.Gly27Glu) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.000018 in 1,552,604 control chromosomes in the GnomAD database, with no homozygous occurrence. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000019 ( 0 hom. )

Consequence

OTOF
NM_194248.3 missense, splice_region

Scores

Splicing: ADA: 0.9956

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.97

Variant links:

Genes affected

OTOF (HGNC:8515): (otoferlin) Mutations in this gene are a cause of neurosensory nonsyndromic recessive deafness, DFNB9. The short form of the encoded protein has 3 C2 domains, a single carboxy-terminal transmembrane domain found also in the C. elegans spermatogenesis factor FER-1 and human dysferlin, while the long form has 6 C2 domains. The homology suggests that this protein may be involved in vesicle membrane fusion. Several transcript variants encoding multiple isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

OTOF links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OTOF	NM_194248.3 linkuse as main transcript	c.80G>A	p.Gly27Glu	missense_variant, splice_region_variant	2/47	ENST00000272371.7
OTOF	NM_001287489.2 linkuse as main transcript	c.80G>A	p.Gly27Glu	missense_variant, splice_region_variant	2/46

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
OTOF	ENST00000272371.7 linkuse as main transcript	c.80G>A	p.Gly27Glu	missense_variant, splice_region_variant	2/47	1	NM_194248.3	A1	Q9HC10-1
OTOF	ENST00000403946.7 linkuse as main transcript	c.80G>A	p.Gly27Glu	missense_variant, splice_region_variant	2/46	5		P4	Q9HC10-5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000125

AC:

AN:

159426

Hom.:

AF XY:

0.00

AC XY:

AN XY:

83904

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000321

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000193

AC:

AN:

1400466

Hom.:

Cov.:

AF XY:

0.0000174

AC XY:

AN XY:

690972

show subpopulations

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:

0.0000250

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152138

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74318

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000386

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000193

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

May 14, 2015

The p.Gly27Glu variant in OTOF has not been previously reported in individuals w ith hearing loss, but has been identified in 1/9224 of European chromosomes by t he Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org). This var iant is located in the first base of the exon, which is part of the 3? splice re gion. Computational tools do not suggest an impact to splicing. However, this in formation is not predictive enough to rule out pathogenicity. Furthermore, while computational prediction tools and conservation analysis suggest that the p.Gly 27Glu substitution may impact the protein, this information is not predictive en ough to determine pathogenicity. In summary, the clinical significance of the p. Gly27Glu variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.33

BayesDel_addAF

Benign

-0.0064

BayesDel_noAF

Benign

-0.25

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.48

T;.

Eigen

Uncertain

0.59

Eigen_PC

Uncertain

0.55

FATHMM_MKL

Uncertain

0.85

LIST_S2

Benign

0.84

T;T

M_CAP

Benign

0.030

MetaRNN

Uncertain

0.68

D;D

MetaSVM

Uncertain

-0.15

MutationAssessor

Uncertain

2.0

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.74

PROVEAN

Uncertain

-3.1

D;D

REVEL

Uncertain

0.44

Sift

Benign

0.063

T;T

Sift4G

Benign

0.11

T;T

Polyphen

1.0

D;.

Vest4

0.59

MVP

0.92

MPC

0.75

ClinPred

0.91

GERP RS

4.8

Varity_R

0.34

gMVP

0.62

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Benign

0.70

SpliceAI score (max)

0.010

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