Genetic Variant TMOD3:p.Arg238Gly (chr15-51896503-C-G) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_014547.5(TMOD3):c.712C>G(p.Arg238Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,398 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 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. R238W) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TMOD3
NM_014547.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.12

Publications

0 publications found

Variant links:

Genes affected

TMOD3 (HGNC:11873): (tropomodulin 3) Enables cadherin binding activity involved in cell-cell adhesion. Predicted to be involved in actin filament organization; muscle contraction; and myofibril assembly. Predicted to act upstream of or within actin cytoskeleton organization; erythrocyte development; and positive regulation of mitotic cell cycle phase transition. Located in adherens junction. [provided by Alliance of Genome Resources, Apr 2022]

TMOD3 links:

ENSG00000259201 (HGNC:):

ENSG00000259201 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.86

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMOD3	NM_014547.5 link	c.712C>G	p.Arg238Gly	missense_variant	Exon 7 of 10	ENST00000308580.12	NP_055362.1	Q9NYL9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TMOD3	ENST00000308580.12 link	c.712C>G	p.Arg238Gly	missense_variant	Exon 7 of 10	1	NM_014547.5	ENSP00000308753.7	Q9NYL9
TMOD3	ENST00000560549.5 link	n.295C>G		non_coding_transcript_exon_variant	Exon 5 of 12	1		ENSP00000454040.1	H0YNJ8
TMOD3	ENST00000561438.5 link	n.214C>G		non_coding_transcript_exon_variant	Exon 2 of 8	5		ENSP00000452939.1	H0YKU1
ENSG00000259201	ENST00000558142.1 link	n.228+2509G>C		intron_variant	Intron 2 of 3	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461398

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727014

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44688

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26118

East Asian (EAS)

AF:

0.00

AC:

AN:

39688

South Asian (SAS)

AF:

0.00

AC:

AN:

86182

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53396

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111706

Other (OTH)

AF:

0.00

AC:

AN:

60382

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.038550), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.72

BayesDel_addAF

Pathogenic

0.27

BayesDel_noAF

Pathogenic

0.15

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.50

Eigen

Benign

-0.00034

Eigen_PC

Benign

-0.019

FATHMM_MKL

Uncertain

0.77

LIST_S2

Uncertain

0.96

M_CAP

Uncertain

0.15

MetaRNN

Pathogenic

0.86

MetaSVM

Uncertain

0.36

MutationAssessor

Benign

2.0

PhyloP100

1.1

PrimateAI

Uncertain

0.55

PROVEAN

Pathogenic

-4.4

REVEL

Pathogenic

0.73

Sift

Benign

0.34

Sift4G

Benign

0.087

Polyphen

0.97

Vest4

0.87

MutPred

0.63

Gain of glycosylation at S239 (P = 0.0589);

MVP

0.53

MPC

0.095

ClinPred

0.94

GERP RS

3.6

Varity_R

0.48

gMVP

0.67

Mutation Taster

=62/38

polymorphism

(source)

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

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chr15-51896503-C-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over