11-72105937-G-T

Variant names:

• chr11-72105937-G-T
• ENST00000307198.11:c.85G>T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001145308.5(LRTOMT):​c.85G>T​(p.Ala29Ser) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000722 in 1,385,364 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 18/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: LRTOMT NM_001145308.5 missense, splice_region
• Scores: Splicing: ADA: 0.000007402
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.325

Genes affected

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]

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]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.056471437).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TOMT	NM_001393500.2	c.-15G>T		5_prime_UTR_variant	Exon 1 of 3	ENST00000541899.3	NP_001380429.1
LRTOMT	NM_001145308.5	c.85G>T	p.Ala29Ser	missense_variant, splice_region_variant	Exon 5 of 7		NP_001138780.1
LRTOMT	NM_001145309.4	c.85G>T	p.Ala29Ser	missense_variant, splice_region_variant	Exon 7 of 9		NP_001138781.1
LRTOMT	NM_001145310.4	c.84-119G>T		intron_variant	Intron 6 of 8		NP_001138782.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LRTOMT	ENST00000307198.11	c.85G>T	p.Ala29Ser	missense_variant, splice_region_variant	Exon 5 of 7	2		ENSP00000305742.7
TOMT	ENST00000541899	c.-15G>T		5_prime_UTR_variant	Exon 1 of 3	5	NM_001393500.2	ENSP00000494667.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.22e-7 AC: 1 AN: 1385364 Hom.: 0 Cov.: 31 AF XY: 0.00000147 AC XY: 1 AN XY: 680528

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: 0.0000205

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.030	T
BayesDel_noAF	Benign	-0.28
CADD	Benign	3.4
DANN	Benign	0.70
DEOGEN2	Benign	0.035	T;T
Eigen	Benign	-1.6
Eigen_PC	Benign	-1.6
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.27	T;.
M_CAP	Benign	0.065	D
MetaRNN	Benign	0.056	T;T
MetaSVM	Benign	-0.74	T
MutationAssessor	Benign	1.1	L;L
PrimateAI	Benign	0.32	T
PROVEAN	Benign	0.040	N;N
REVEL	Benign	0.25
Sift	Benign	0.42	T;T
Sift4G	Benign	0.68	T;T
Polyphen		0.0030	B;B
Vest4		0.21
MutPred		0.36		Loss of helix (P = 0.0068);Loss of helix (P = 0.0068);
MVP		0.45
MPC		0.061
ClinPred		0.057	T
GERP RS		0.91
Varity_R		0.030
gMVP		0.097

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0000074
dbscSNV1_RF	Benign	0.0
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

No publications associated with this variant yet.

Other links and lift over

hg19: chr11-71816983;