19-12705349-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP2 PP3_Moderate

The NM_001382241.1(TNPO2):c.1913T>G(p.Met638Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TNPO2 NM_001382241.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.91

Genes affected

TNPO2 (HGNC:19998): (transportin 2) Predicted to enable nuclear import signal receptor activity and nuclear localization sequence binding activity. Predicted to be involved in protein import into nucleus. Predicted to act upstream of or within negative regulation of muscle cell differentiation. Predicted to be active in cytoplasm and nucleus. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, TNPO2
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.872

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TNPO2	NM_001382241.1	c.1913T>G	p.Met638Arg	missense_variant	18/26	ENST00000425528.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TNPO2	ENST00000425528.6	c.1913T>G	p.Met638Arg	missense_variant	18/26	5	NM_001382241.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Feb 13, 2020

Has not been previously published as pathogenic or benign to our knowledge; Not observed in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Variants in candidate genes are classified as variants of uncertain significance in accordance with ACMG guidelines (Richards et al., 2015) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.19
Cadd	Uncertain	24
Dann	Uncertain	0.99
DEOGEN2	Benign	0.31	T;.;.;T;.
Eigen	Pathogenic	0.73
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	0.99	D;.;.;.;D
M_CAP	Benign	0.056	D
MetaRNN	Pathogenic	0.87	D;D;D;D;D
MetaSVM	Benign	-0.71	T
MutationAssessor	Pathogenic	3.3	M;M;M;M;M
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Pathogenic	-4.8	D;D;D;.;.
REVEL	Pathogenic	0.66
Sift	Uncertain	0.0010	D;D;D;.;.
Sift4G	Uncertain	0.0040	D;D;D;D;D
Polyphen		0.98	D;.;.;D;.
Vest4		0.95
MutPred		0.64		Gain of catalytic residue at M638 (P = 0.0177);Gain of catalytic residue at M638 (P = 0.0177);Gain of catalytic residue at M638 (P = 0.0177);Gain of catalytic residue at M638 (P = 0.0177);Gain of catalytic residue at M638 (P = 0.0177);
MVP		0.55
MPC		2.7
ClinPred		1.0	D
GERP RS		5.6
Varity_R		0.92
gMVP		0.98

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-12816163;