2-26537756-C-G

Position:

• chr2-26537756-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_194248.3(OTOF):​c.98G>C​(p.Arg33Pro) variant causes a missense change. The variant allele was found at a frequency of 0.00000214 in 1,402,418 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: OTOF NM_194248.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.97

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.841

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OTOF	NM_194248.3	c.98G>C	p.Arg33Pro	missense_variant	2/47	ENST00000272371.7	NP_919224.1
OTOF	NM_001287489.2	c.98G>C	p.Arg33Pro	missense_variant	2/46		NP_001274418.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OTOF	ENST00000272371.7	c.98G>C	p.Arg33Pro	missense_variant	2/47	1	NM_194248.3	ENSP00000272371.2
OTOF	ENST00000403946.7	c.98G>C	p.Arg33Pro	missense_variant	2/46	5		ENSP00000385255.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000124 AC: 2 AN: 161902 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 85296

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000785

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000214 AC: 3 AN: 1402418 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 692064

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000549

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: 0.00

Gnomad4 OTH exome AF: 0.0000172

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.39
BayesDel_addAF	Uncertain	0.018	T
BayesDel_noAF	Uncertain	-0.020
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.37	T;.
Eigen	Pathogenic	0.68
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Benign	0.067	D
MetaRNN	Pathogenic	0.84	D;D
MetaSVM	Uncertain	0.0084	D
MutationAssessor	Uncertain	2.4	M;M
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-2.1	N;N
REVEL	Uncertain	0.53
Sift	Uncertain	0.0080	D;D
Sift4G	Uncertain	0.023	D;D
Polyphen		1.0	D;.
Vest4		0.83
MutPred		0.58		Loss of MoRF binding (P = 0.0104);Loss of MoRF binding (P = 0.0104);
MVP		0.94
MPC		0.79
ClinPred		0.97	D
GERP RS		4.8
Varity_R		0.53
gMVP		0.76

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

LitVar

Other links and lift over

dbSNP: rs56332208; hg19: chr2-26760624;