chr18-46559495-G-A

Position:

chr18-46559495-G-A

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_001384474.1(LOXHD1):c.3169C>T(p.Arg1057Ter) variant causes a stop gained change. The variant allele was found at a frequency of 0.0000367 in 1,551,802 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000039 ( 0 hom. )

Consequence

LOXHD1
NM_001384474.1 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 6.76

Variant links:

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]

LOXHD1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 18-46559495-G-A is Pathogenic according to our data. Variant chr18-46559495-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 179755.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr18-46559495-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LOXHD1	NM_001384474.1 linkuse as main transcript	c.3169C>T	p.Arg1057Ter	stop_gained	20/41	ENST00000642948.1	NP_001371403.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LOXHD1	ENST00000642948.1 linkuse as main transcript	c.3169C>T	p.Arg1057Ter	stop_gained	20/41		NM_001384474.1	ENSP00000496347	P1
LOXHD1	ENST00000536736.5 linkuse as main transcript	c.3169C>T	p.Arg1057Ter	stop_gained	20/40	5		ENSP00000444586
LOXHD1	ENST00000441551.6 linkuse as main transcript	c.2599-2006C>T		intron_variant		5		ENSP00000387621		Q8IVV2-1
LOXHD1	ENST00000335730.6 linkuse as main transcript	n.2482C>T		non_coding_transcript_exon_variant	13/27	2

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000188

AC:

AN:

159438

Hom.:

AF XY:

0.0000239

AC XY:

AN XY:

83842

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000588

Gnomad NFE exome

AF:

0.0000162

Gnomad OTH exome

AF:

0.000222

GnomAD4 exome

AF:

0.0000393

AC:

AN:

1399652

Hom.:

Cov.:

AF XY:

0.0000420

AC XY:

AN XY:

690340

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000280

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000280

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000202

Gnomad4 NFE exome

AF:

0.0000482

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152150

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74314

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.0000378

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal recessive nonsyndromic hearing loss 77

Pathogenic:1

Pathogenic, no assertion criteria provided

clinical testing

Natera, Inc.

Sep 16, 2020

- -

not provided

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 06, 2023

For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 179755). This premature translational stop signal has been observed in individual(s) with deafness (PMID: 29676012). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. This variant is present in population databases (rs727505104, gnomAD 0.006%). This sequence change creates a premature translational stop signal (p.Arg1057*) in the LOXHD1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in LOXHD1 are known to be pathogenic (PMID: 19732867, 21465660, 25792669). -

Rare genetic deafness

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

May 15, 2014

The Arg1057X variant in LOXHD1 has not been previously reported in individuals w ith hearing loss and was absent from large population studies. This nonsense var iant leads to a premature termination codon at position 1057, which is predicted to lead to a truncated or absent protein. Loss of function variants in the LOXH D1 gene have been previously reported to segregate in affected individuals from several families with autosomal recessive nonsyndromic hearing loss (Grillet 200 9, Edvardson 2011). In summary, this variant meets our criteria to be classified as pathogenic (http://pcpgm.partners.org/LMM). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Uncertain

0.049

BayesDel_noAF

Benign

-0.16

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.37

FATHMM_MKL

Pathogenic

0.97

MutationTaster

Benign

1.0

A;A;D

Vest4

0.40

ClinPred

0.90

GERP RS

4.4

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over