chr5-69441655-C-T

Variant names:

• chr5-69441655-C-T
• rs570049997
• ENST00000413223.3:n.*1C>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000413223.3(MARVELD2):​n.*1C>T variant causes a non coding transcript exon change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000193 in 1,553,488 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 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000018 (0 hom.)
• Consequence: MARVELD2 ENST00000413223.3 non_coding_transcript_exon
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.171
• Publications: 0 publications found

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

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MARVELD2	NM_001038603.3	c.*1C>T		3_prime_UTR_variant	Exon 7 of 7	ENST00000325631.10	NP_001033692.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MARVELD2	ENST00000325631.10	c.*1C>T		3_prime_UTR_variant	Exon 7 of 7	1	NM_001038603.3	ENSP00000323264.5

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152030 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000656

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000415

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.0000563 AC: 14 AN: 248608 AF XY: 0.0000445

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000204

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000549

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000266

Gnomad OTH exome AF: 0.000166

GnomAD4 exome AF: 0.0000178 AC: 25 AN: 1401340 Hom.: 0 Cov.: 26 AF XY: 0.0000214 AC XY: 15 AN XY: 700188

African (AFR) AF: 0.00 AC: 0 AN: 32098

American (AMR) AF: 0.000181 AC: 8 AN: 44276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25590

East Asian (EAS) AF: 0.0000255 AC: 1 AN: 39210

South Asian (SAS) AF: 0.0000599 AC: 5 AN: 83482

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53066

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4336

European-Non Finnish (NFE) AF: 0.00000848 AC: 9 AN: 1061120

Other (OTH) AF: 0.0000344 AC: 2 AN: 58162

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 152148 Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3 AN XY: 74392

African (AFR) AF: 0.00 AC: 0 AN: 41534

American (AMR) AF: 0.0000655 AC: 1 AN: 15258

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5180

South Asian (SAS) AF: 0.000415 AC: 2 AN: 4816

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10590

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 67990

Other (OTH) AF: 0.000473 AC: 1 AN: 2112

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000302

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jan 26, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.*1C>T variant in MARVELD2 has not been previously reported in ndividuals w ith hearing loss. This variant has been identified in 8/118894 of the total chro mosomes from several populations by the Exome Aggregation Consortium (ExAC, http ://exac.broadinstitute.org; dbSNP rs570049997). Although this variant has been seen in the general population, its frequency is not high enough to rule out a p athogenic role. This variant is in the 3' untranslated region (UTR). The nucle otide at this position is not conserved through species; however, this informati on does not provide strong support for or against an impact to the protein. In s ummary, the clinical significance of the c.*1C>T variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	6.1
DANN	Benign	0.80
PhyloP100		-0.17

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

Other links and lift over

dbSNP: rs570049997; hg19: chr5-68737482;