18-46541815-G-C

Position:

• chr18-46541815-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PM5

The NM_001384474.1(LOXHD1):​c.3874C>G​(p.Leu1292Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000286 in 1,399,410 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L1292F) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000029 (0 hom.)
• Consequence: LOXHD1 NM_001384474.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.45

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 Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr18-46541815-G-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LOXHD1	NM_001384474.1	c.3874C>G	p.Leu1292Val	missense_variant	25/41	ENST00000642948.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LOXHD1	ENST00000642948.1	c.3874C>G	p.Leu1292Val	missense_variant	25/41		NM_001384474.1	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000286 AC: 4 AN: 1399410 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 690210

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000371

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000314 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Benign	-0.031	T
BayesDel_noAF	Benign	-0.28
CADD	Uncertain	25
DANN	Benign	0.87
Eigen	Uncertain	0.61
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Uncertain	0.89	D;D;D;D;D;D
M_CAP	Benign	0.028	D
MetaRNN	Uncertain	0.43	T;T;T;T;T;T
MetaSVM	Benign	-0.63	T
MutationTaster	Benign	1.0	D;D;D;D;D;D;D
PrimateAI	Benign	0.40	T
Sift4G	Uncertain	0.0090	D;D;D;D;.;D
Polyphen		0.98	.;.;.;D;.;.
Vest4		0.44
MVP		0.30
ClinPred		0.76	D
GERP RS		4.8
Varity_R		0.13
gMVP		0.47

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: rs200792636; hg19: chr18-44121778;