rs727505320

Variant names:

• chr18-46529182-C-T
• rs727505320
• NM_001384474.1:c.4525G>A

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_001384474.1(LOXHD1):​c.4525G>A​(p.Gly1509Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G1509E) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: LOXHD1 NM_001384474.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.77
• Publications: 2 publications found

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

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.958

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LOXHD1	NM_001384474.1	c.4525G>A	p.Gly1509Arg	missense_variant	Exon 29 of 41	ENST00000642948.1	NP_001371403.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LOXHD1	ENST00000642948.1	c.4525G>A	p.Gly1509Arg	missense_variant	Exon 29 of 41		NM_001384474.1	ENSP00000496347.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Nov 07, 2014

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Gly1509Arg variant in LOXHD1 has not been previously reported in individua ls with hearing loss and was absent from large population studies. Another varia nt at the same residue in LOXHD1 (p.Gly1509Glu) meets our criteria to be classif ied as likely benign, suggesting that a change at this amino acid position may b e tolerated. However, computational prediction tools and conservation analysis d o not provide strong support for or against an impact to the protein. In summary , the clinical significance of the p.Gly1509Arg variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.67
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Benign	0.21	.;.;T;.;.;.
Eigen	Pathogenic	0.91
Eigen_PC	Pathogenic	0.84
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D;D;D;D;D;D
M_CAP	Pathogenic	0.40	D
MetaRNN	Pathogenic	0.96	D;D;D;D;D;D
MetaSVM	Benign	-0.36	T
PhyloP100		7.8
PrimateAI	Uncertain	0.68	T
PROVEAN	Pathogenic	-6.1	.;D;.;D;.;.
REVEL	Pathogenic	0.72
Sift	Uncertain	0.0020	.;D;.;D;.;.
Sift4G	Uncertain	0.0040	D;D;D;D;.;D
Polyphen		1.0	.;.;.;D;.;.
Vest4		0.72
MutPred		0.81		.;.;.;Loss of ubiquitination at K1505 (P = 0.0312);Loss of ubiquitination at K1505 (P = 0.0312);.;
MVP		0.24
ClinPred		0.99	D
GERP RS		5.1
Varity_R		0.44
gMVP		0.62
Mutation Taster		=9/91	disease causing

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: rs727505320; hg19: chr18-44109145;