5-69419970-A-G

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBS1_Supporting

The NM_001038603.3(MARVELD2):c.585A>G(p.Ile195Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000527 in 1,614,094 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00031 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

MARVELD2
NM_001038603.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: -0.627

Publications

1 publications found

Variant links:

Genes affected

MARVELD2 (HGNC:26401): (MARVEL domain containing 2) The protein encoded by this gene is a membrane protein found at the tight junctions between epithelial cells. The encoded protein helps establish epithelial barriers such as those in the organ of Corti, where these barriers are required for normal hearing. Defects in this gene are a cause of deafness autosomal recessive type 49 (DFNB49). Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2011]

MARVELD2 Gene-Disease associations (from GenCC):

nonsyndromic genetic hearing loss
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
autosomal recessive nonsyndromic hearing loss 49
Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, PanelApp Australia, Labcorp Genetics (formerly Invitae)
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

MARVELD2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.013627201).

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000309 (47/152204) while in subpopulation AFR AF = 0.00106 (44/41524). AF 95% confidence interval is 0.00081. There are 0 homozygotes in GnomAd4. There are 26 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MARVELD2	NM_001038603.3 link	c.585A>G	p.Ile195Met	missense_variant	Exon 2 of 7	ENST00000325631.10	NP_001033692.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MARVELD2	ENST00000325631.10 link	c.585A>G	p.Ile195Met	missense_variant	Exon 2 of 7	1	NM_001038603.3	ENSP00000323264.5

Frequencies

GnomAD3 genomes

AF:

0.000309

AC:

AN:

152086

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00106

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000994

AC:

AN:

251476

AF XY:

0.0000589

show subpopulations

Gnomad AFR exome

AF:

0.00148

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.0000260

AC:

AN:

1461890

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.000896

AC:

AN:

33480

American (AMR)

AF:

0.0000447

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1112010

Other (OTH)

AF:

0.0000993

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.493

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000309

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.000349

AC XY:

AN XY:

74414

show subpopulations

African (AFR)

AF:

0.00106

AC:

AN:

41524

American (AMR)

AF:

0.000196

AC:

AN:

15276

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68014

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000116

Hom.:

Bravo

AF:

0.000389

ExAC

AF:

0.000181

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 25, 2017

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Ile195Met variant in MARVELD2 has been previously reported in the heterozy gous state in 1 individual with hearing loss by our laboratory. This variant has been identified in 0.1% (27/24034) of African chromosomes by the Genome Aggrega tion Database (gnomAD, http://http://gnomad.broadinstitute.org; dbSNP rs14487055 8). Computational prediction tools and conservation analyses do not provide stro ng support for or against an impact to the protein. In summary the clinical sign ificance of the p.Ile195Met variant is uncertain. -

not provided

Uncertain:1

Jul 11, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces isoleucine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 195 of the MARVELD2 protein (p.Ile195Met). This variant is present in population databases (rs144870558, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with MARVELD2-related conditions. ClinVar contains an entry for this variant (Variation ID: 178408). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.34

CADD

Benign

9.9

(source)

DANN

Benign

0.96

DEOGEN2

Benign

0.12

.;T;T;T;.;T;T

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.060

LIST_S2

Benign

0.84

.;.;.;T;T;T;T

M_CAP

Benign

0.015

MetaRNN

Benign

0.014

T;T;T;T;T;T;T

MetaSVM

Benign

-0.28

MutationAssessor

Uncertain

2.2

M;M;M;M;M;.;.

PhyloP100

-0.63

PrimateAI

Uncertain

0.64

PROVEAN

Benign

-0.63

.;N;.;.;N;N;N

REVEL

Uncertain

0.30

Sift

Uncertain

0.0010

.;D;.;.;D;D;D

Sift4G

Uncertain

0.0080

.;D;.;.;D;D;D

Polyphen

0.97

D;P;P;P;D;.;.

Vest4

0.54, 0.55, 0.57

MVP

0.48

MPC

0.36

ClinPred

0.12

GERP RS

-10

Varity_R

0.15

gMVP

0.64

Mutation Taster

=81/19

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over