Genetic Variant TNMD:p.Gly295Arg (chrX-100599646-G-A) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_022144.3(TNMD):c.883G>A(p.Gly295Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000182 in 1,098,096 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 22)

Exomes 𝑓: 0.0000018 ( 0 hom. 0 hem. )

Consequence

TNMD
NM_022144.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.51

Publications

0 publications found

Variant links:

Genes affected

TNMD (HGNC:17757): (tenomodulin) This gene encodes a protein that is related to chondromodulin-I, which is a cartilage-specific glycoprotein that functions to stimulate chondrocyte growth and to inhibit tube formation of endothelial cells. This protein is also an angiogenesis inhibitor. Genetic variation in this gene is associated with a risk for type 2 diabetes, central obesity and serum levels of systemic immune mediators in a body size-dependent manner. This gene is also a candidate gene for age-related macular degeneration, though a direct link has yet to be demonstrated. [provided by RefSeq, Sep 2009]

TNMD links:

ENSG00000301679 (HGNC:):

ENSG00000301679 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.958

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TNMD	NM_022144.3 link	c.883G>A	p.Gly295Arg	missense_variant	Exon 7 of 7	ENST00000373031.5	NP_071427.2	Q9H2S6-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TNMD	ENST00000373031.5 link	c.883G>A	p.Gly295Arg	missense_variant	Exon 7 of 7	1	NM_022144.3	ENSP00000362122.4		Q9H2S6-1
ENSG00000301679	ENST00000780746.1 link	n.77+6548C>T		intron_variant	Intron 1 of 1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000219

AC:

AN:

182889

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000289

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000182

AC:

AN:

1098096

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

363454

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26402

American (AMR)

AF:

0.00

AC:

AN:

35199

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19385

East Asian (EAS)

AF:

0.0000662

AC:

AN:

30203

South Asian (SAS)

AF:

0.00

AC:

AN:

54084

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40520

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4136

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

842078

Other (OTH)

AF:

0.00

AC:

AN:

46089

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 01, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.883G>A (p.G295R) alteration is located in exon 7 (coding exon 7) of the TNMD gene. This alteration results from a G to A substitution at nucleotide position 883, causing the glycine (G) at amino acid position 295 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.96

BayesDel_addAF

Uncertain

0.098

BayesDel_noAF

Pathogenic

0.21

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.84

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.93

M_CAP

Pathogenic

0.49

MetaRNN

Pathogenic

0.96

MetaSVM

Benign

-0.79

MutationAssessor

Uncertain

2.0

PhyloP100

7.5

PrimateAI

Pathogenic

0.87

PROVEAN

Pathogenic

-5.4

REVEL

Uncertain

0.52

Sift

Pathogenic

0.0

Sift4G

Uncertain

0.0030

Polyphen

1.0

Vest4

0.82

MutPred

0.85

Gain of methylation at G295 (P = 0.0454);

MVP

0.82

MPC

1.0

ClinPred

0.77

GERP RS

5.9

Varity_R

0.93

gMVP

0.96

Mutation Taster

=66/34

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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X-100599646-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over