2-26489746-G-T

Position:

chr2-26489746-G-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_194248.3(OTOF):c.898-6C>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000145 in 1,610,876 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00015 ( 0 hom. )

Consequence

OTOF
NM_194248.3 splice_region, intron

Scores

Splicing: ADA: 0.001547

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 1.36

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 Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.78).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OTOF	NM_194248.3 linkuse as main transcript	c.898-6C>A		splice_region_variant, intron_variant		ENST00000272371.7	NP_919224.1	Q9HC10-1
OTOF	NM_001287489.2 linkuse as main transcript	c.898-6C>A		splice_region_variant, intron_variant			NP_001274418.1	Q9HC10-5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OTOF	ENST00000272371.7 linkuse as main transcript	c.898-6C>A		splice_region_variant, intron_variant		1	NM_194248.3	ENSP00000272371.2		Q9HC10-1
OTOF	ENST00000403946.7 linkuse as main transcript	c.898-6C>A		splice_region_variant, intron_variant		5		ENSP00000385255.3		Q9HC10-5

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152240

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

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:

0.000118

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000108

AC:

AN:

250142

Hom.:

AF XY:

0.0000811

AC XY:

AN XY:

135622

show subpopulations

Gnomad AFR exome

AF:

0.0000620

Gnomad AMR exome

AF:

0.000261

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:

0.000151

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000150

AC:

219

AN:

1458518

Hom.:

Cov.:

AF XY:

0.000135

AC XY:

AN XY:

725746

show subpopulations

Gnomad4 AFR exome

AF:

0.0000897

Gnomad4 AMR exome

AF:

0.000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000172

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.0000919

AC:

AN:

152358

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74510

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.0000727

Hom.:

Bravo

AF:

0.000106

EpiCase

AF:

0.000327

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 10, 2022	This sequence change falls in intron 9 of the OTOF gene. It does not directly change the encoded amino acid sequence of the OTOF protein. This variant is present in population databases (rs199687628, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with OTOF-related conditions. ClinVar contains an entry for this variant (Variation ID: 164876). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Mar 22, 2021	In silico analysis supports a deleterious effect on splicing; Has not been previously published as pathogenic or benign to our knowledge -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

May 05, 2015

The c.898-6C>A variant in OTOF has not been previously identified in individuals with hearing loss or auditory neuropathy. It has also been identified in 4/1145 4 of Latino chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.b roadinstitute.org; dbSNP rs199687628). This variant is located in the 3' splice region. Computational tools do not suggest an impact to splicing. However, this information is not predictive enough to rule out pathogenicity. In summary, the clinical significance of the c.898-6C>A variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.78

CADD

Benign

4.4

DANN

Benign

0.53

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0015

dbscSNV1_RF

Benign

0.086

SpliceAI score (max)

0.20

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.20

Position offset: -6

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