NM_001384474.1:c.442A>T

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_001384474.1(LOXHD1):c.442A>T(p.Lys148*) variant causes a stop gained change. The variant allele was found at a frequency of 0.0000174 in 1,551,644 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

LOXHD1
NM_001384474.1 stop_gained

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8

Conservation

PhyloP100: 4.18

Publications

5 publications found

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 Gene-Disease associations (from GenCC):

autosomal recessive nonsyndromic hearing loss 77
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics
nonsyndromic genetic hearing loss
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Fuchs' endothelial dystrophy
Inheritance: AD Classification: LIMITED Submitted by: Illumina

LOXHD1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PVS1

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

PP5

Variant 18-46639685-T-A is Pathogenic according to our data. Variant chr18-46639685-T-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 291140.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LOXHD1	NM_001384474.1 link	c.442A>T	p.Lys148*	stop_gained	Exon 4 of 41	ENST00000642948.1	NP_001371403.1
LOXHD1	NM_144612.7 link	c.442A>T	p.Lys148*	stop_gained	Exon 4 of 40		NP_653213.6	Q8IVV2F5GZB4B7Z7T7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
LOXHD1	ENST00000642948.1 link	c.442A>T	p.Lys148*	stop_gained	Exon 4 of 41		NM_001384474.1	ENSP00000496347.1	A0A2R8Y7K4
LOXHD1	ENST00000536736.5 link	c.442A>T	p.Lys148*	stop_gained	Exon 4 of 40	5		ENSP00000444586.1	F5GZB4
LOXHD1	ENST00000441551.6 link	c.442A>T	p.Lys148*	stop_gained	Exon 4 of 39	5		ENSP00000387621.2	Q8IVV2-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152220

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000255

AC:

AN:

156576

AF XY:

0.0000482

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000660

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000164

AC:

AN:

1399424

Hom.:

Cov.:

AF XY:

0.0000159

AC XY:

AN XY:

690222

show subpopulations

African (AFR)

AF:

0.0000316

AC:

AN:

31598

American (AMR)

AF:

0.00

AC:

AN:

35704

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25182

East Asian (EAS)

AF:

0.00

AC:

AN:

35738

South Asian (SAS)

AF:

0.00

AC:

AN:

79236

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49282

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5698

European-Non Finnish (NFE)

AF:

0.0000204

AC:

AN:

1078976

Other (OTH)

AF:

0.00

AC:

AN:

58010

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152220

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74364

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41462

American (AMR)

AF:

0.00

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

68038

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000151

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal recessive nonsyndromic hearing loss 77

Pathogenic:4

Nov 14, 2014

Baylor Genetics

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

Our laboratory reported dual molecular diagnoses in PUF60 (NM_001271099.1, c.1381-2A>G) and LOXHD1 (NM_144612.6, c.4217C>T and c.442A>T in trans) in one individual with reported features which include delayed motor milestones, delayed speech, intellectual disability, bilateral sensorineural hearing loss, febrile seizures, dysmorphic features, short stature, failure to thrive, and abnormal visual tracking. Heterozygotes for the LOXHD1 variants would not be expected to be affected. -

Jan 11, 2018

Counsyl

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Apr 12, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Mar 11, 2022

MGZ Medical Genetics Center

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Pathogenic:3

Oct 28, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Lys148*) 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). This variant is present in population databases (no rsID available, gnomAD 0.007%). This premature translational stop signal has been observed in individual(s) with LOXHD1-related conditions (PMID: 19732867, 21465660, 25792669, 27959697). ClinVar contains an entry for this variant (Variation ID: 291140). For these reasons, this variant has been classified as Pathogenic. -

Sep 05, 2016

Eurofins Ntd Llc (ga)

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 01, 2021

CeGaT Center for Human Genetics Tuebingen

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

LOXHD1-related disorder

Pathogenic:1

Aug 19, 2024

PreventionGenetics, part of Exact Sciences

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

The LOXHD1 c.442A>T variant is predicted to result in premature protein termination (p.Lys148*). This variant was reported in the heterozygous state without a second potentially causative variant in an individual with non-syndromic hearing loss (Table S1, Safka Brozkova et al. 2020. PubMed ID: 32860223) and in the heterozygous state along with a missense variant in a patient with unspecified phenotype (Patient 45, Supplemental Appendix, Posey et al 2017. PubMed ID: 27959697). This variant is reported in 0.0066% of alleles in individuals of European (Non-Finnish) descent in gnomAD. Nonsense variants in LOXHD1 are expected to be pathogenic. This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.48

BayesDel_noAF

Pathogenic

0.63

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Pathogenic

1.0

Eigen_PC

Pathogenic

0.91

FATHMM_MKL

Uncertain

0.95

PhyloP100

4.2

Vest4

0.41

ClinPred

0.97

GERP RS

5.8

Mutation Taster

=0/200

disease causing (ClinVar)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over