rs199518750

Variant names:

• chr18-46529184-C-A
• rs199518750
• NM_001384474.1:c.4523G>T

Your query was ambiguous. Multiple possible variants found:

• chr18-46529184-C-A
• chr18-46529184-C-G
• chr18-46529184-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001384474.1(LOXHD1):​c.4523G>T​(p.Arg1508Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000143 in 1,399,402 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. R1508K) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: LOXHD1 NM_001384474.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.11
• Publications: 0 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: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001384474.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LOXHD1	NM_001384474.1	MANE Select	c.4523G>T	p.Arg1508Ile	missense	Exon 29 of 41	NP_001371403.1
	LOXHD1	NM_144612.7		c.4523G>T	p.Arg1508Ile	missense	Exon 29 of 40	NP_653213.6
	LOXHD1	NM_001145472.3		c.1190G>T	p.Arg397Ile	missense	Exon 11 of 24	NP_001138944.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LOXHD1	ENST00000642948.1	MANE Select	c.4523G>T	p.Arg1508Ile	missense	Exon 29 of 41	ENSP00000496347.1
	LOXHD1	ENST00000300591.11	TSL:1	c.1190G>T	p.Arg397Ile	missense	Exon 11 of 24	ENSP00000300591.6
	LOXHD1	ENST00000579038.6	TSL:1	c.902G>T	p.Arg301Ile	missense	Exon 9 of 22	ENSP00000463285.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000143 AC: 2 AN: 1399402 Hom.: 0 Cov.: 32 AF XY: 0.00000145 AC XY: 1 AN XY: 690204

African (AFR) AF: 0.00 AC: 0 AN: 31594

American (AMR) AF: 0.00 AC: 0 AN: 35702

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25182

East Asian (EAS) AF: 0.00 AC: 0 AN: 35738

South Asian (SAS) AF: 0.00 AC: 0 AN: 79236

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49288

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5698

European-Non Finnish (NFE) AF: 0.00000185 AC: 2 AN: 1078962

Other (OTH) AF: 0.00 AC: 0 AN: 58002

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.40
BayesDel_addAF	Benign	-0.085	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	22
DANN	Benign	0.91
DEOGEN2	Benign	0.38	T
Eigen	Uncertain	0.36
Eigen_PC	Benign	0.19
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.97	D
M_CAP	Uncertain	0.15	D
MetaRNN	Uncertain	0.74	D
MetaSVM	Benign	-0.40	T
PhyloP100		1.1
PrimateAI	Benign	0.43	T
PROVEAN	Pathogenic	-6.0	D
REVEL	Uncertain	0.31
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.46
MutPred		0.68		Loss of disorder (P = 0.0255)
MVP		0.19
ClinPred		1.0	D
GERP RS		-1.8
Varity_R		0.086
gMVP		0.57
Mutation Taster		=64/36	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs199518750; hg19: chr18-44109147;