chr6-75848483-G-A

Variant names:

• chr6-75848483-G-A
• rs199798449
• NM_004999.4:c.1030G>A

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_Strong BP6

The NM_004999.4(MYO6):​c.1030G>A​(p.Val344Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000293 in 1,613,692 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00049 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00027 (1 hom.)
• Consequence: MYO6 NM_004999.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:2
• Conservation: PhyloP100: 9.57
• Publications: 7 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), PanelApp Australia
• nonsyndromic genetic hearing loss

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

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics
• 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

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

• BP4: Computational evidence support a benign effect (MetaRNN=0.030655801).
• BP6: Variant 6-75848483-G-A is Benign according to our data. Variant chr6-75848483-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 45132.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYO6	NM_004999.4	MANE Select	c.1030G>A	p.Val344Ile	missense	Exon 11 of 35	NP_004990.3
	MYO6	NM_001368865.1		c.1030G>A	p.Val344Ile	missense	Exon 11 of 36	NP_001355794.1
	MYO6	NM_001368866.1		c.1030G>A	p.Val344Ile	missense	Exon 11 of 35	NP_001355795.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYO6	ENST00000369977.8	TSL:1 MANE Select	c.1030G>A	p.Val344Ile	missense	Exon 11 of 35	ENSP00000358994.3
	MYO6	ENST00000615563.4	TSL:1	c.1030G>A	p.Val344Ile	missense	Exon 10 of 32	ENSP00000478013.1
	MYO6	ENST00000664640.1		c.1030G>A	p.Val344Ile	missense	Exon 11 of 36	ENSP00000499278.1

Frequencies

GnomAD3 genomes AF: 0.000487 AC: 74 AN: 152042 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000656

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00483

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000294

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.000438 AC: 110 AN: 251264 AF XY: 0.000471

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00360

Gnomad NFE exome AF: 0.000264

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000273 AC: 399 AN: 1461532 Hom.: 1 Cov.: 31 AF XY: 0.000254 AC XY: 185 AN XY: 727044

African (AFR) AF: 0.0000299 AC: 1 AN: 33458

American (AMR) AF: 0.0000447 AC: 2 AN: 44706

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39680

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86192

European-Finnish (FIN) AF: 0.00262 AC: 140 AN: 53410

Middle Eastern (MID) AF: 0.000347 AC: 2 AN: 5768

European-Non Finnish (NFE) AF: 0.000215 AC: 239 AN: 1111808

Other (OTH) AF: 0.000215 AC: 13 AN: 60382

GnomAD4 genome AF: 0.000486 AC: 74 AN: 152160 Hom.: 0 Cov.: 32 AF XY: 0.000726 AC XY: 54 AN XY: 74372

African (AFR) AF: 0.0000241 AC: 1 AN: 41522

American (AMR) AF: 0.0000655 AC: 1 AN: 15266

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: 0.00483 AC: 51 AN: 10568

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

European-Non Finnish (NFE) AF: 0.000294 AC: 20 AN: 68008

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

Alfa AF: 0.000308 Hom.: 0

Bravo AF: 0.000125

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000233 AC: 2

ExAC AF: 0.000338 AC: 41

EpiCase AF: 0.000273

EpiControl AF: 0.000296

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	1	not provided (2)
-	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
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.17
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.34	T
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Benign	0.031	D
MetaRNN	Benign	0.031	T
MetaSVM	Benign	-0.86	T
MutationAssessor	Benign	0.75	N
PhyloP100		9.6
PrimateAI	Uncertain	0.64	T
PROVEAN	Benign	-0.76	N
REVEL	Benign	0.24
Sift	Benign	0.16	T
Sift4G	Benign	0.44	T
Polyphen		1.0	D
Vest4		0.79
MVP		0.54
MPC		0.21
ClinPred		0.12	T
GERP RS		5.4
gMVP		0.56
Mutation Taster		=77/23	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

Other links and lift over

dbSNP: rs199798449; hg19: chr6-76558200; COSMIC: COSV100889220;