rs138437852

Variant names:

• chr6-75907674-T-C
• rs138437852
• NM_004999.4:c.3246T>C
• MYO6 p.Tyr1082Tyr

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_Strong BP6 BP7 BS1 BS2

The NM_004999.4(MYO6):​c.3246T>C​(p.Tyr1082Tyr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000874 in 1,613,522 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). The gene MYO6 is included in the ClinGen Criteria Specification Registry.

• Frequency:
  • Genomes: 𝑓 0.0044 (4 hom., cov: 32)
  • Exomes 𝑓: 0.00051 (2 hom.)
• Consequence: MYO6 NM_004999.4 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:6
• Conservation: PhyloP100: -0.367
• Publications: 1 publications found

Genes affected

MYO6 (HGNC:7605): (myosin VI) This gene encodes a reverse-direction motor protein that moves toward the minus end of actin filaments and plays a role in intracellular vesicle and organelle transport. The protein consists of a motor domain containing an ATP- and an actin-binding site and a globular tail which interacts with other proteins. This protein maintains the structural integrity of inner ear hair cells and mutations in this gene cause non-syndromic autosomal dominant and recessive hearing loss. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Jul 2014]

MYO6 Gene-Disease associations (from GenCC):

• autosomal dominant nonsyndromic hearing loss 22

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• nonsyndromic genetic hearing loss

  Inheritance: AR, AD Classification: DEFINITIVE, MODERATE Submitted by: G2P, ClinGen
• autosomal recessive nonsyndromic hearing loss 37

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• autosomal dominant nonsyndromic hearing loss

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• progressive sensorineural hearing loss-hypertrophic cardiomyopathy syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Specifications for MYO6 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Benign. The variant received -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.63).
• BP6: Variant 6-75907674-T-C is Benign according to our data. Variant chr6-75907674-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 164644.
• BP7: Synonymous conserved (PhyloP=-0.367 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00439 (669/152260) while in subpopulation AFR AF = 0.0151 (629/41556). AF 95% confidence interval is 0.0142. There are 4 homozygotes in GnomAd4. There are 294 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 4 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004999.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYO6	NM_004999.4	MANE Select	c.3246T>C	p.Tyr1082Tyr	synonymous	Exon 31 of 35	NP_004990.3
	MYO6	NM_001368865.1		c.3273T>C	p.Tyr1091Tyr	synonymous	Exon 32 of 36	NP_001355794.1	A0A590UJ40
	MYO6	NM_001368866.1		c.3273T>C	p.Tyr1091Tyr	synonymous	Exon 32 of 35	NP_001355795.1	A0A1Y0BRN3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYO6	ENST00000369977.8	TSL:1 MANE Select	c.3246T>C	p.Tyr1082Tyr	synonymous	Exon 31 of 35	ENSP00000358994.3	Q9UM54-1
	MYO6	ENST00000615563.4	TSL:1	c.3177T>C	p.Tyr1059Tyr	synonymous	Exon 28 of 32	ENSP00000478013.1	Q9UM54-2
	MYO6	ENST00000664640.1		c.3273T>C	p.Tyr1091Tyr	synonymous	Exon 32 of 36	ENSP00000499278.1	A0A590UJ40

Frequencies

GnomAD3 genomes AF: 0.00440 AC: 669 AN: 152142 Hom.: 4 Cov.: 32

Gnomad AFR AF: 0.0152

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00216

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00143

GnomAD2 exomes AF: 0.00117 AC: 294 AN: 251174 AF XY: 0.000781

Gnomad AFR exome AF: 0.0160

Gnomad AMR exome AF: 0.000491

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000967

Gnomad OTH exome AF: 0.000978

GnomAD4 exome AF: 0.000508 AC: 742 AN: 1461262 Hom.: 2 Cov.: 30 AF XY: 0.000442 AC XY: 321 AN XY: 726966

African (AFR) AF: 0.0149 AC: 498 AN: 33456

American (AMR) AF: 0.000961 AC: 43 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39662

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53118

Middle Eastern (MID) AF: 0.000694 AC: 4 AN: 5766

European-Non Finnish (NFE) AF: 0.000104 AC: 116 AN: 1111766

Other (OTH) AF: 0.00132 AC: 80 AN: 60390

GnomAD4 genome AF: 0.00439 AC: 669 AN: 152260 Hom.: 4 Cov.: 32 AF XY: 0.00395 AC XY: 294 AN XY: 74466

African (AFR) AF: 0.0151 AC: 629 AN: 41556

American (AMR) AF: 0.00216 AC: 33 AN: 15288

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5186

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10602

Middle Eastern (MID) AF: 0.00680 AC: 2 AN: 294

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68012

Other (OTH) AF: 0.00142 AC: 3 AN: 2116

Alfa AF: 0.00206 Hom.: 1

Bravo AF: 0.00517

Asia WGS AF: 0.00231 AC: 8 AN: 3478

EpiCase AF: 0.000164

EpiControl AF: 0.000178

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	4	not provided (4)
-	-	1	Autosomal dominant nonsyndromic hearing loss 22 (1)
-	1	-	Autosomal recessive nonsyndromic hearing loss 37 (1)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.63
CADD	Benign	0.33
DANN	Benign	0.39
PhyloP100		-0.37
Mutation Taster		=85/15	polymorphism

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs138437852;

hg19: chr6-76617391;