NM_016239.4:c.7893+1G>A

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_016239.4(MYO15A):c.7893+1G>A variant causes a splice donor, intron change. The variant allele was found at a frequency of 0.00000899 in 1,557,572 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000085 ( 0 hom. )

Consequence

MYO15A
NM_016239.4 splice_donor, intron

Scores

Splicing: ADA: 1.000

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 4.80

Publications

2 publications found

Variant links:

Genes affected

MYO15A (HGNC:7594): (myosin XVA) This gene encodes an unconventional myosin. This protein differs from other myosins in that it has a long N-terminal extension preceding the conserved motor domain. Studies in mice suggest that this protein is necessary for actin organization in the hair cells of the cochlea. Mutations in this gene have been associated with profound, congenital, neurosensory, nonsyndromal deafness. This gene is located within the Smith-Magenis syndrome region on chromosome 17. Read-through transcripts containing an upstream gene and this gene have been identified, but they are not thought to encode a fusion protein. Several alternatively spliced transcript variants have been described, but their full length sequences have not been determined. [provided by RefSeq, Jul 2008]

MYO15A Gene-Disease associations (from GenCC):

autosomal recessive nonsyndromic hearing loss 3
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), PanelApp Australia
nonsyndromic genetic hearing loss
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

MYO15A links:

LOC124903944 (HGNC:):

LOC124903944 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 18 ACMG points.

PVS1

Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, Cryptic splice site detected, with MaxEntScore 5.9, offset of 13, new splice context is: aagGTgggg. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 17-18151952-G-A is Pathogenic according to our data. Variant chr17-18151952-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 164552.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
MYO15A	NM_016239.4 link	c.7893+1G>A	splice_donor_variant, intron_variant	Intron 41 of 65	ENST00000647165.2	NP_057323.3	Q9UKN7-1
MYO15A	XM_017024715.3 link	c.7896+1G>A	splice_donor_variant, intron_variant	Intron 39 of 63		XP_016880204.1
MYO15A	XM_017024714.3 link	c.7833+1G>A	splice_donor_variant, intron_variant	Intron 38 of 62		XP_016880203.1
LOC124903944	XR_007065652.1 link	n.74-46C>T	intron_variant	Intron 1 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYO15A	ENST00000647165.2 link	c.7893+1G>A		splice_donor_variant, intron_variant	Intron 41 of 65		NM_016239.4	ENSP00000495481.1		Q9UKN7-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152218

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000124

AC:

AN:

160972

AF XY:

0.0000117

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000315

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000854

AC:

AN:

1405354

Hom.:

Cov.:

AF XY:

0.00000865

AC XY:

AN XY:

693558

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32286

American (AMR)

AF:

0.00

AC:

AN:

35936

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25194

East Asian (EAS)

AF:

0.00

AC:

AN:

37040

South Asian (SAS)

AF:

0.00

AC:

AN:

79610

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5634

European-Non Finnish (NFE)

AF:

0.0000111

AC:

AN:

1081796

Other (OTH)

AF:

0.00

AC:

AN:

58252

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152218

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74358

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41434

American (AMR)

AF:

0.00

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5202

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68046

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.600

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000294

Hom.:

Bravo

AF:

0.00000756

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:3

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jun 03, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Disruption of this splice site has been observed in individual(s) with clinical features of deafness (PMID: 27068579). ClinVar contains an entry for this variant (Variation ID: 164552). 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 currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. This variant is present in population databases (rs727503316, gnomAD 0.005%). This sequence change affects a donor splice site in intron 41 of the MYO15A gene. It is expected to disrupt RNA splicing. Variants that disrupt the donor or acceptor splice site typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in MYO15A are known to be pathogenic (PMID: 17546645). -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Rare genetic deafness

Pathogenic:1

May 21, 2013

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The 7893+1G>A variant in MYO15A has not been reported in affected individuals or in large population studies. This variant occurs in the invariant region (+/- 1 /2) of the splice consensus sequence and is predicted to cause altered splicing leading to an abnormal or absent protein. Loss of function is an established dis ease mechanism for MYO15A. Therefore, this variant meets our criteria to be clas sified as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.16

BayesDel_noAF

Pathogenic

0.14

CADD

Pathogenic

(source)

DANN

Benign

0.96

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.69

FATHMM_MKL

Benign

0.75

PhyloP100

4.8

GERP RS

4.2

Mutation Taster

=16/84

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.93

SpliceAI score (max)

1.0

Details are displayed if max score is > 0.2

DS_DL_spliceai

1.0

Position offset: -1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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NM_016239.4:c.7893+1G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over