rs376338995

chr18-46524714-G-A

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6 BP7

The NM_001384474.1(LOXHD1):c.4734C>T(p.Tyr1578=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000651 in 1,551,594 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 Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000059 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000066 (0 hom.)
• Consequence: LOXHD1 NM_001384474.1 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:2
• Conservation: PhyloP100: 0.219

Genes affected

LOXHD1 (HGNC:26521): (lipoxygenase homology PLAT domains 1) This gene encodes a highly conserved protein consisting entirely of PLAT (polycystin/lipoxygenase/alpha-toxin) domains, thought to be involved in targeting proteins to the plasma membrane. Studies in mice show that this gene is expressed in the mechanosensory hair cells in the inner ear, and mutations in this gene lead to auditory defects, indicating that this gene is essential for normal hair cell function. Screening of human families segregating deafness identified a mutation in this gene which causes DFNB77, a progressive form of autosomal-recessive nonsyndromic hearing loss (ARNSHL). Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Mar 2010]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.61).
• BP6: Variant 18-46524714-G-A is Benign according to our data. Variant chr18-46524714-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 227525.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=2}.
• BP7: Synonymous conserved (PhyloP=0.219 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LOXHD1	NM_001384474.1	c.4734C>T	p.Tyr1578=	synonymous_variant	30/41	ENST00000642948.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LOXHD1	ENST00000642948.1	c.4734C>T	p.Tyr1578=	synonymous_variant	30/41		NM_001384474.1	P1

Frequencies

GnomAD3 genomes AF: 0.0000591 AC: 9 AN: 152200 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000942

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000697 AC: 11 AN: 157788 Hom.: 0 AF XY: 0.0000722 AC XY: 6 AN XY: 83118

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000404

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000884

Gnomad SAS exome AF: 0.0000439

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000116

Gnomad OTH exome AF: 0.000225

GnomAD4 exome AF: 0.0000657 AC: 92 AN: 1399394 Hom.: 0 Cov.: 32 AF XY: 0.0000652 AC XY: 45 AN XY: 690204

Gnomad4 AFR exome AF: 0.000127

Gnomad4 AMR exome AF: 0.0000840

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000140

Gnomad4 SAS exome AF: 0.0000379

Gnomad4 FIN exome AF: 0.0000406

Gnomad4 NFE exome AF: 0.0000686

Gnomad4 OTH exome AF: 0.0000172

GnomAD4 genome AF: 0.0000591 AC: 9 AN: 152200 Hom.: 0 Cov.: 33 AF XY: 0.0000404 AC XY: 3 AN XY: 74348

Gnomad4 AFR AF: 0.0000483

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000942

Gnomad4 NFE AF: 0.0000735

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000116 Hom.: 0

Bravo AF: 0.0000793

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Autosomal recessive nonsyndromic hearing loss 77 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Apr 07, 2016

p.Tyr1578Tyr in exon 30 of LOXHD1: This variant is not expected to have clinical significance because it does not alter an amino acid residue and is not located within the splice consensus sequence. -

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 25, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.61
Cadd	Benign	0.29
Dann	Benign	0.34

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

LitVar

Other links and lift over

dbSNP: rs376338995; hg19: chr18-44104677; COSMIC: COSV56064529; COSMIC: COSV56064529;