rs876657500

Variant names:

• chr11-72105969-A-C
• rs876657500
• NM_001393500.2:c.18A>C

Your query was ambiguous. Multiple possible variants found:

• chr11-72105969-A-C
• chr11-72105969-A-G
• chr11-72105969-A-T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001393500.2(TOMT):​c.18A>C​(p.Ala6Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000358 in 1,397,634 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000036 (0 hom.)
• Consequence: TOMT NM_001393500.2 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.39

Genes affected

TOMT (HGNC:55527): (transmembrane O-methyltransferase) This gene encodes a catechol-O-methyltransferase that catalyzes the transfer of a methyl group from S-adenosyl-L-methionine to a hydroxyl group of catechols and is essential for auditory and vestibular function. Mutations in this gene have been associated with nonsyndromic deafness. Readthrough transcription is observed across this gene and the adjacent leucine-rich repeat containing 51 gene. A third locus (GeneID:220074) is defined to represent the readthrough transcripts. [provided by RefSeq, Feb 2021]

LRTOMT (HGNC:25033): (leucine rich transmembrane and O-methyltransferase domain containing) This locus represents naturally occurring readthrough transcription between the neighboring LRRC51 (leucine-rich repeat containing 51) and TOMT (transmembrane O-methyltransferase) genes on chromosome 11. The readthrough transcript encodes a fusion protein that shares sequence identity with each individual gene product. Multiple reports implicate mutations in this gene in nonsyndromic deafness.[provided by RefSeq, Feb 2021]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BP7: Synonymous conserved (PhyloP=-1.39 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TOMT	NM_001393500.2	c.18A>C	p.Ala6Ala	synonymous_variant	Exon 1 of 3	ENST00000541899.3	NP_001380429.1
LRTOMT	NM_001145308.5	c.117A>C	p.Ala39Ala	synonymous_variant	Exon 5 of 7		NP_001138780.1
LRTOMT	NM_001145309.4	c.117A>C	p.Ala39Ala	synonymous_variant	Exon 7 of 9		NP_001138781.1
LRTOMT	NM_001145310.4	c.84-87A>C		intron_variant	Intron 6 of 8		NP_001138782.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TOMT	ENST00000541899.3	c.18A>C	p.Ala6Ala	synonymous_variant	Exon 1 of 3	5	NM_001393500.2	ENSP00000494667.1
LRTOMT	ENST00000307198.11	c.117A>C	p.Ala39Ala	synonymous_variant	Exon 5 of 7	2		ENSP00000305742.7

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000358 AC: 5 AN: 1397634 Hom.: 0 Cov.: 30 AF XY: 0.00000435 AC XY: 3 AN XY: 689324

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: 0.00000278

Gnomad4 OTH exome AF: 0.0000346

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	0.27
DANN	Benign	0.86

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: rs876657500; hg19: chr11-71817015;