Genetic Variant TMPRSS12:p.Arg77Trp (chr12-50843883-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_182559.3(TMPRSS12):c.229C>T(p.Arg77Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000147 in 1,565,870 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000035 ( 0 hom. )

Consequence

TMPRSS12
NM_182559.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.875

Variant links:

Genes affected

TMPRSS12 (HGNC:28779): (transmembrane serine protease 12) Predicted to enable serine-type endopeptidase activity. Predicted to be involved in proteolysis. Predicted to act upstream of or within binding activity of sperm to zona pellucida and protein processing. Predicted to be located in acrosomal vesicle. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

TMPRSS12 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMPRSS12	NM_182559.3 link	c.229C>T	p.Arg77Trp	missense_variant	Exon 2 of 5	ENST00000398458.4	NP_872365.2	Q86WS5A0A140VJY1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TMPRSS12	ENST00000398458.4 link	c.229C>T	p.Arg77Trp	missense_variant	Exon 2 of 5	1	NM_182559.3	ENSP00000381476.3		Q86WS5
TMPRSS12	ENST00000551456.5 link	c.229C>T	p.Arg77Trp	missense_variant	Exon 2 of 4	2		ENSP00000447259.1		F8WBX2

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152072

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000435

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000167

AC:

AN:

179702

Hom.:

AF XY:

0.0000105

AC XY:

AN XY:

95188

show subpopulations

Gnomad AFR exome

AF:

0.000291

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000354

AC:

AN:

1413680

Hom.:

Cov.:

AF XY:

0.00000286

AC XY:

AN XY:

698622

show subpopulations

Gnomad4 AFR exome

AF:

0.000155

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.000118

AC:

AN:

152190

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74422

show subpopulations

Gnomad4 AFR

AF:

0.000434

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.00000562

Hom.:

Bravo

AF:

0.0000793

ESP6500AA

AF:

0.00102

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000586

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 27, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.229C>T (p.R77W) alteration is located in exon 2 (coding exon 2) of the TMPRSS12 gene. This alteration results from a C to T substitution at nucleotide position 229, causing the arginine (R) at amino acid position 77 to be replaced by a tryptophan (W). 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

Uncertain

0.38

BayesDel_addAF

Benign

-0.015

BayesDel_noAF

Uncertain

0.12

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.15

.;T

Eigen

Uncertain

0.34

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.83

LIST_S2

Benign

0.80

T;T

M_CAP

Benign

0.066

MetaRNN

Uncertain

0.62

D;D

MetaSVM

Benign

-0.38

MutationAssessor

Benign

0.90

.;L

PrimateAI

Uncertain

0.49

PROVEAN

Pathogenic

-6.7

D;D

REVEL

Uncertain

0.52

Sift

Uncertain

0.020

D;T

Sift4G

Uncertain

0.014

D;D

Polyphen

1.0

D;D

Vest4

0.66

MVP

0.76

MPC

0.63

ClinPred

0.64

GERP RS

5.7

Varity_R

0.62

gMVP

0.73

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.12

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over