19-50259245-C-T

Variant names:

• chr19-50259245-C-T
• rs190941610
• NM_001145809.2:c.2334C>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001145809.2(MYH14):​c.2334C>T​(p.Leu778Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000697 in 1,434,274 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. L778L) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: MYH14 NM_001145809.2 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.357
• Publications: 0 publications found

Genes affected

MYH14 (HGNC:23212): (myosin heavy chain 14) This gene encodes a member of the myosin superfamily. The protein represents a conventional non-muscle myosin; it should not be confused with the unconventional myosin-14 (MYO14). Myosins are actin-dependent motor proteins with diverse functions including regulation of cytokinesis, cell motility, and cell polarity. Mutations in this gene result in one form of autosomal dominant hearing impairment. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2011]

MYH14 Gene-Disease associations (from GenCC):

• autosomal dominant nonsyndromic hearing loss 4A

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• peripheral neuropathy-myopathy-hoarseness-hearing loss syndrome

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

  Inheritance: AD Classification: MODERATE Submitted by: ClinGen
• autosomal dominant nonsyndromic hearing loss

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.47).
• BP7: Synonymous conserved (PhyloP=0.357 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001145809.2. 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
	MYH14	NM_001145809.2	MANE Select	c.2334C>T	p.Leu778Leu	synonymous	Exon 19 of 43	NP_001139281.1	Q7Z406-2
	MYH14	NM_001077186.2		c.2235C>T	p.Leu745Leu	synonymous	Exon 18 of 42	NP_001070654.1	Q7Z406-6
	MYH14	NM_024729.4		c.2211C>T	p.Leu737Leu	synonymous	Exon 17 of 41	NP_079005.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYH14	ENST00000642316.2	MANE Select	c.2334C>T	p.Leu778Leu	synonymous	Exon 19 of 43	ENSP00000493594.1	Q7Z406-2
	MYH14	ENST00000599920.5	TSL:1	c.2235C>T	p.Leu745Leu	synonymous	Exon 18 of 24	ENSP00000469573.1	M0QY43
	MYH14	ENST00000425460.6	TSL:5	c.2235C>T	p.Leu745Leu	synonymous	Exon 18 of 42	ENSP00000407879.1	Q7Z406-6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.97e-7 AC: 1 AN: 1434274 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 710726

African (AFR) AF: 0.00 AC: 0 AN: 32862

American (AMR) AF: 0.00 AC: 0 AN: 40602

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25644

East Asian (EAS) AF: 0.00 AC: 0 AN: 38574

South Asian (SAS) AF: 0.00 AC: 0 AN: 82460

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51314

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5618

European-Non Finnish (NFE) AF: 9.11e-7 AC: 1 AN: 1097790

Other (OTH) AF: 0.00 AC: 0 AN: 59410

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.47
CADD	Benign	9.1
DANN	Benign	0.95
PhyloP100		0.36

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: rs190941610; hg19: chr19-50762502;